{"title":"Backert Labs Phono Pre-Amps","description":null,"products":[{"product_id":"backert-labs-rhumba-xphono-1-1-tube-phono-preamplifier","title":"Backert Labs Rhumba XPhono 1.1 Tube Phono Preamplifier","description":"\u003c!-- ======================================================\nBackert Labs Rhumba XPhono 1.1 Tube Phono Preamplifier\nSEO-Optimized Shopify Product Page\nBuilt-to-Order Notice Included\n====================================================== --\u003e\n\u003cstyle\u003e\n.bh-wrap,\n.bh-wrap *,\n.bh-wrap *::before,\n.bh-wrap *::after{\n  box-sizing:border-box;\n}\n\n.bh-wrap{\n  width:100%;\n  max-width:1100px;\n  margin:0 auto;\n  padding:1rem 1.25rem;\n  line-height:1.6;\n}\n\n.bh-eyebrow{\n  display:block;\n  margin:0;\n  font-size:.8rem;\n  letter-spacing:.08em;\n  text-transform:uppercase;\n  opacity:.7;\n}\n\n.bh-title{\n  margin:.25rem 0 1rem;\n  font-size:2.75rem;\n  font-weight:700;\n  line-height:1.2;\n  overflow-wrap:normal;\n  word-break:normal;\n}\n\n.bh-intro{\n  margin:0 0 1.25rem;\n  font-style:italic;\n}\n\n.bh-order-note{\n  width:100%;\n  margin:1rem 0 1.5rem;\n  padding:1rem 1.1rem;\n  border-left:4px solid #1f766f;\n  border-radius:.35rem;\n  background:#f2f8f7;\n  line-height:1.5;\n}\n\n.bh-order-note strong{\n  display:block;\n  margin-bottom:.15rem;\n}\n\n.bh-grid{\n  display:grid;\n  grid-template-columns:minmax(0,1fr);\n  gap:2rem;\n  width:100%;\n  max-width:100%;\n}\n\n.bh-main,\n.bh-side{\n  display:block;\n  width:100%;\n  min-width:0;\n  max-width:100%;\n  margin:0;\n  padding:0;\n}\n\n@media(min-width:900px){\n  .bh-grid{\n    grid-template-columns:minmax(0,64%) minmax(0,36%);\n    align-items:start;\n  }\n}\n\n.bh-section{\n  width:100%;\n  max-width:100%;\n  margin:2rem 0;\n}\n\n.bh-section h2{\n  margin:0 0 1rem;\n  line-height:1.3;\n  overflow-wrap:normal;\n  word-break:normal;\n  hyphens:none;\n}\n\n.bh-section p,\n.bh-section li{\n  overflow-wrap:break-word;\n  word-break:normal;\n}\n\n.bh-bullets{\n  margin:.5rem 0 0;\n  padding-left:1.25rem;\n  list-style:disc;\n}\n\n.bh-bullets li{\n  margin-bottom:.45rem;\n}\n\n.bh-specs{\n  display:block;\n  width:100%;\n  min-width:0;\n  max-width:100%;\n  margin:0;\n  border-top:1px solid #e5e7eb;\n  border-left:1px solid #e5e7eb;\n  overflow:visible;\n}\n\n.bh-spec-row{\n  display:grid;\n  grid-template-columns:minmax(0,42%) minmax(0,58%);\n  width:100%;\n  min-width:0;\n}\n\n.bh-spec-label,\n.bh-spec-value{\n  min-width:0;\n  padding:.58rem;\n  border-right:1px solid #e5e7eb;\n  border-bottom:1px solid #e5e7eb;\n  font-size:.86rem;\n  line-height:1.4;\n  white-space:normal;\n  overflow-wrap:anywhere;\n  word-break:normal;\n  overflow:visible;\n}\n\n.bh-spec-label{\n  background:#f8fafc;\n  font-weight:600;\n}\n\n.bh-faq details{\n  margin:.5rem 0;\n  padding:.75rem 1rem;\n  border:1px solid #e5e7eb;\n  border-radius:.5rem;\n  background:#fafafa;\n}\n\n.bh-faq summary{\n  font-weight:600;\n  cursor:pointer;\n}\n\n@media(max-width:899px){\n  .bh-wrap{\n    padding:.75rem 1rem;\n  }\n\n  .bh-title{\n    font-size:2.1rem;\n  }\n\n  .bh-grid{\n    gap:.5rem;\n  }\n}\n\n@media(max-width:480px){\n  .bh-title{\n    font-size:1.8rem;\n  }\n\n  .bh-spec-row{\n    grid-template-columns:minmax(0,40%) minmax(0,60%);\n  }\n\n  .bh-spec-label,\n  .bh-spec-value{\n    padding:.48rem;\n    font-size:.8rem;\n  }\n}\n\u003c\/style\u003e\n\u003cdiv class=\"bh-wrap\" itemscope=\"\" itemtype=\"https:\/\/schema.org\/Product\"\u003e\n\u003cspan class=\"bh-eyebrow\"\u003eBackert Labs\u003c\/span\u003e\n\u003ch1 class=\"bh-title\" itemprop=\"name\"\u003eBackert Labs Rhumba XPhono 1.1 Tube Phono Preamplifier\u003c\/h1\u003e\n\u003cp class=\"bh-intro\"\u003ePure Class A Tube Phono Stage • Moving-Magnet and Moving-Coil Inputs • Four Gold Lion 12AT7 Tubes • Switchable Gain • 15 MC Loading Options • Balanced XLR Output • GreenForce Power Supply • Made in Pennsylvania\u003c\/p\u003e\n\u003cdiv class=\"bh-order-note\"\u003e\n\u003cstrong\u003eBuilt to Order\u003c\/strong\u003e The Backert Labs Rhumba XPhono 1.1 Tube Phono Preamplifier is built to order. The typical lead time is approximately 10–14 business days before shipment. Actual production time may vary depending on current demand, configuration, finish selection and parts availability.\u003c\/div\u003e\n\u003cdiv class=\"bh-grid\"\u003e\n\u003c!-- LEFT COLUMN --\u003e\n\u003cdiv class=\"bh-main\"\u003e\n\u003csection id=\"overview\" class=\"bh-section\"\u003e\n\u003ch2\u003eReference Tube Phono Performance for Moving-Magnet and Moving-Coil Cartridges\u003c\/h2\u003e\n\u003cp itemprop=\"description\"\u003eThe \u003cstrong\u003eBackert Labs Rhumba XPhono 1.1 Tube Phono Preamplifier\u003c\/strong\u003e is designed to uncover the musical energy, tonal color and dimensional realism preserved in vinyl records. Separate moving-magnet and moving-coil inputs accommodate a wide range of cartridges, while front-panel switching provides convenient access to two gain settings for each cartridge type. Its pure Class A amplification circuit uses four Gold Lion gold-pin 12AT7 tubes and operates without global or local negative feedback.\u003c\/p\u003e\n\u003cp\u003eBackert Labs combines its patented GreenForce power-supply technology with separate dedicated power supplies for the phono circuit’s individual gain stages. Fifteen moving-coil loading options allow the phono stage to be matched to different cartridge requirements, while balanced XLR and unbalanced RCA outputs support a variety of high-performance audio systems. Each unit is built to order by hand in Pennsylvania, with a typical lead time of approximately 10–14 business days before shipment.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection id=\"highlights\" class=\"bh-section\"\u003e\n\u003ch2\u003eHighlights \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul class=\"bh-bullets\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeparate MM and MC Inputs\u003c\/strong\u003e — Dedicated RCA input pairs support moving-magnet and moving-coil cartridges without requiring internal input rewiring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour Selectable Gain Levels\u003c\/strong\u003e — Front-panel switching provides 41dB or 47dB of moving-magnet gain and 61dB or 67dB of moving-coil gain.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFifteen MC Loading Options\u003c\/strong\u003e — Supplied loading plugs allow the moving-coil input to be tailored to the electrical requirements of a compatible cartridge.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalanced and Unbalanced Outputs\u003c\/strong\u003e — XLR and RCA connections provide flexible integration with line-stage preamplifiers, integrated amplifiers and other high-end audio components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTube-Friendly Ownership\u003c\/strong\u003e — Automatic tube biasing, gentle operating conditions and a removable top access door simplify tube replacement and support long service life.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection id=\"technology\" class=\"bh-section\"\u003e\n\u003ch2\u003eTechnology \u0026amp; Design\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eSeparate GreenForce Power Supplies\u003c\/strong\u003e — A phono preamplifier requires multiple amplification stages to raise a cartridge’s low-level signal to a usable line-level output. The Rhumba XPhono provides a dedicated GreenForce power supply for each active gain stage rather than requiring both stages to draw from one shared supply.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePure Class A Tube Amplification\u003c\/strong\u003e — The \u003cstrong\u003eBackert Labs Rhumba XPhono 1.1 Tube Phono Preamplifier\u003c\/strong\u003e incorporates technology derived from the company’s acclaimed tube line stages. Four 12AT7 tubes provide active amplification without global or local negative feedback.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePassive Moving-Coil Step-Up Stage\u003c\/strong\u003e — Moving-coil signals receive additional gain through a passive step-up transformer before reaching the active tube amplification stages. This arrangement provides the additional gain needed by low-output MC cartridges without adding another powered gain circuit.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFlexible Cartridge Matching\u003c\/strong\u003e — Fifteen MC loading choices are selected using supplied rear-panel RCA loading plugs. Separate chassis-ground and power-supply-ground connections allow the quieter grounding arrangement to be selected for the connected turntable and audio system.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection id=\"faq\" class=\"bh-section bh-faq\"\u003e\n\u003ch2\u003eFAQ — Backert Labs Rhumba XPhono 1.1 Tube Phono Preamplifier\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs the Rhumba XPhono 1.1 built to order?\u003c\/summary\u003e\n\u003cp\u003eYes. This product is built to order, and the typical lead time is approximately 10–14 business days before shipment. Actual production time may vary depending on current demand, cartridge configuration, finish selection and parts availability.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes it support both moving-magnet and moving-coil cartridges?\u003c\/summary\u003e\n\u003cp\u003eYes. The \u003cstrong\u003eBackert Labs Rhumba XPhono 1.1 Tube Phono Preamplifier\u003c\/strong\u003e provides separate RCA inputs for moving-magnet and moving-coil cartridges, with cartridge type and gain selected from the front panel.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow is moving-coil cartridge loading adjusted?\u003c\/summary\u003e\n\u003cp\u003eThe moving-coil input provides 15 loading options. The desired load is applied by installing the appropriate supplied RCA loading plugs into the designated rear-panel connections.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan two turntables or tonearms be connected?\u003c\/summary\u003e\n\u003cp\u003eThe separate MM and MC inputs can accommodate two compatible cartridge sources. A second moving-coil cartridge may also be used through a suitable external step-up transformer connected to the moving-magnet input.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection id=\"why-buy\" class=\"bh-section\"\u003e\n\u003ch2\u003eWhy Buy From Us\u003c\/h2\u003e\n\u003cul class=\"bh-bullets\"\u003e\n\u003cli\u003eAuthorized Backert Labs Dealer\u003c\/li\u003e\n\u003cli\u003e5% Reward Points on Every Purchase\u003c\/li\u003e\n\u003cli\u003ePrice Match Guarantee\u003c\/li\u003e\n\u003cli\u003eExpert Cartridge Matching, Loading Configuration and Turntable Setup Support\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection id=\"related\" class=\"bh-section\"\u003e\n\u003ch2\u003eRelated Products \u0026amp; Accessories\u003c\/h2\u003e\n\u003cul class=\"bh-bullets\"\u003e\n\u003cli\u003eBackert Labs Rhythm 1.4 Preamplifier\u003c\/li\u003e\n\u003cli\u003eBackert Labs Rhumba Extreme 1.4 Preamplifier\u003c\/li\u003e\n\u003cli\u003eBackert Labs Rhumba 1.4 Preamplifier\u003c\/li\u003e\n\u003cli\u003eBackert Labs Selected 12AT7 Replacement Tube Set\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c!-- RIGHT COLUMN --\u003e\n\u003cdiv class=\"bh-side\"\u003e\n\u003csection id=\"specs\" class=\"bh-section\"\u003e\n\u003ch2\u003eBackert Labs Rhumba XPhono 1.1 Specifications\u003c\/h2\u003e\n\u003cdiv class=\"bh-specs\" role=\"table\"\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eProduct Type\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eTube moving-magnet and moving-coil phono preamplifier\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eAvailability\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eBuilt to order\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eTypical Lead Time\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eApproximately 10–14 business days before shipment\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eSupported Cartridges\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eMoving-magnet and moving-coil\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eMM Input\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003e1 × stereo RCA input pair\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eMC Input\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003e1 × stereo RCA input pair\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eCartridge Selection\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eFront-panel MM\/MC switch\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eMM Gain\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003e41dB or 47dB\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eMC Gain\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003e61dB or 67dB\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eGain Selection\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eFront-panel high\/low gain switch\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eMC Loading Options\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003e15 selectable load settings\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eMC Loading Method\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eSupplied rear-panel RCA loading plugs\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eMC Gain Stage\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003ePassive step-up transformer preceding the active tube stages\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eCircuit Type\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003ePure Class A tube amplification\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eNegative Feedback\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eNo global or local negative feedback\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eTube Complement\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003e4 × 12AT7 vacuum tubes\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eSupplied Tubes\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eGold Lion gold-pin 12AT7 tubes\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eTube Bias\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eAutomatic biasing for all four tubes\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eTube Access\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eRemovable top-panel tube-access door\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003ePower-Supply Design\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003ePatented Backert Labs GreenForce power-supply technology\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eGain-Stage Power Supplies\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eSeparate dedicated power supply for each active gain stage\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003ePower Transformer\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eCustom-designed toroidal transformer\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eBalanced Output\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003e1 × stereo XLR output pair\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eUnbalanced Output\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003e1 × stereo RCA output pair\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eGrounding Connections\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eChassis-ground and power-supply-ground options\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eFront-Panel Controls\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eMM\/MC selection, gain selection, mute and power\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eFeet\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eCustom solid-brass feet\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eChassis Construction\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eAmerican-machined aluminum chassis\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eStandard Body Finish\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eBlack\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eFaceplate Finishes\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eBlack or silver\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eOptional Body Finishes\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eRed or blue by special order\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eManufacturing\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eDesigned and built by hand in Pennsylvania, USA\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eQuantity\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eEach\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eBrand\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eBackert Labs\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection id=\"whats-in-the-box\" class=\"bh-section\"\u003e\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul class=\"bh-bullets\"\u003e\n\u003cli\u003e1 × Backert Labs Rhumba XPhono 1.1 Tube Phono Preamplifier\u003c\/li\u003e\n\u003cli\u003e4 × Gold Lion Gold-Pin 12AT7 Vacuum Tubes\u003c\/li\u003e\n\u003cli\u003e1 × Set of Moving-Coil Loading Plugs\u003c\/li\u003e\n\u003cli\u003e1 × Detachable AC Power Cable\u003c\/li\u003e\n\u003cli\u003e1 × Owner’s Documentation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eTurntable, phono cartridge, tonearm, external step-up transformer, line-stage preamplifier, interconnect cables and replacement tubes are sold separately.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cmeta itemprop=\"brand\" content=\"Backert Labs\"\u003e \u003cmeta itemprop=\"category\" content=\"Phono Preamplifiers, Tube Phono Stages, Moving-Coil Phono Preamplifiers, Moving-Magnet Phono Preamplifiers\"\u003e\n\u003c\/div\u003e","brand":"Backert Labs","offers":[{"title":"Silver \/ Black","offer_id":54394651836782,"sku":"BACRHUMBAXPHONO11SLVBLK","price":7800.0,"currency_code":"USD","in_stock":true},{"title":"Silver \/ Red","offer_id":54394651869550,"sku":"BACRHUMBAXPHONO11SLVRED","price":8100.0,"currency_code":"USD","in_stock":true},{"title":"Silver \/ Blue","offer_id":54394651902318,"sku":"BACRHUMBAXPHONO11SLVBLU","price":8100.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ Black","offer_id":54394651935086,"sku":"BACRHUMBAXPHONO11BLKBLK","price":7800.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ Red","offer_id":54394651967854,"sku":"BACRHUMBAXPHONO11BLKRED","price":8100.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ Blue","offer_id":54394652000622,"sku":"BACRHUMBAXPHONO11BLKBLU","price":8100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0583\/1537\/4703\/files\/backert-labs-rhumba-xphono-1-1-tube-phono-preamplifier.webp?v=1785161775"},{"product_id":"backert-labs-optik-phono-equalizer-for-ds-audio-cartridges","title":"Backert Labs Optik Phono Equalizer For DS Audio Cartridges","description":"\u003c!-- ======================================================\nBackert Labs Optik Phono Equalizer for DS Audio Cartridges\nSEO-Optimized Shopify Product Page\nBuilt-to-Order Notice Included\n====================================================== --\u003e\n\u003cstyle\u003e\n.bh-wrap,\n.bh-wrap *,\n.bh-wrap *::before,\n.bh-wrap *::after{\n  box-sizing:border-box;\n}\n\n.bh-wrap{\n  width:100%;\n  max-width:1100px;\n  margin:0 auto;\n  padding:1rem 1.25rem;\n  line-height:1.6;\n}\n\n.bh-eyebrow{\n  display:block;\n  margin:0;\n  font-size:.8rem;\n  letter-spacing:.08em;\n  text-transform:uppercase;\n  opacity:.7;\n}\n\n.bh-title{\n  margin:.25rem 0 1rem;\n  font-size:2.75rem;\n  font-weight:700;\n  line-height:1.2;\n  overflow-wrap:normal;\n  word-break:normal;\n}\n\n.bh-intro{\n  margin:0 0 1.25rem;\n  font-style:italic;\n}\n\n.bh-order-note{\n  width:100%;\n  margin:1rem 0 1.5rem;\n  padding:1rem 1.1rem;\n  border-left:4px solid #1f766f;\n  border-radius:.35rem;\n  background:#f2f8f7;\n  line-height:1.5;\n}\n\n.bh-order-note strong{\n  display:block;\n  margin-bottom:.15rem;\n}\n\n.bh-grid{\n  display:grid;\n  grid-template-columns:minmax(0,1fr);\n  gap:2rem;\n  width:100%;\n  max-width:100%;\n}\n\n.bh-main,\n.bh-side{\n  display:block;\n  width:100%;\n  min-width:0;\n  max-width:100%;\n  margin:0;\n  padding:0;\n}\n\n@media(min-width:900px){\n  .bh-grid{\n    grid-template-columns:minmax(0,64%) minmax(0,36%);\n    align-items:start;\n  }\n}\n\n.bh-section{\n  width:100%;\n  max-width:100%;\n  margin:2rem 0;\n}\n\n.bh-section h2{\n  margin:0 0 1rem;\n  line-height:1.3;\n  overflow-wrap:normal;\n  word-break:normal;\n  hyphens:none;\n}\n\n.bh-section p,\n.bh-section li{\n  overflow-wrap:break-word;\n  word-break:normal;\n}\n\n.bh-bullets{\n  margin:.5rem 0 0;\n  padding-left:1.25rem;\n  list-style:disc;\n}\n\n.bh-bullets li{\n  margin-bottom:.45rem;\n}\n\n.bh-specs{\n  display:block;\n  width:100%;\n  min-width:0;\n  max-width:100%;\n  margin:0;\n  border-top:1px solid #e5e7eb;\n  border-left:1px solid #e5e7eb;\n  overflow:visible;\n}\n\n.bh-spec-row{\n  display:grid;\n  grid-template-columns:minmax(0,42%) minmax(0,58%);\n  width:100%;\n  min-width:0;\n}\n\n.bh-spec-label,\n.bh-spec-value{\n  min-width:0;\n  padding:.58rem;\n  border-right:1px solid #e5e7eb;\n  border-bottom:1px solid #e5e7eb;\n  font-size:.86rem;\n  line-height:1.4;\n  white-space:normal;\n  overflow-wrap:anywhere;\n  word-break:normal;\n  overflow:visible;\n}\n\n.bh-spec-label{\n  background:#f8fafc;\n  font-weight:600;\n}\n\n.bh-faq details{\n  margin:.5rem 0;\n  padding:.75rem 1rem;\n  border:1px solid #e5e7eb;\n  border-radius:.5rem;\n  background:#fafafa;\n}\n\n.bh-faq summary{\n  font-weight:600;\n  cursor:pointer;\n}\n\n@media(max-width:899px){\n  .bh-wrap{\n    padding:.75rem 1rem;\n  }\n\n  .bh-title{\n    font-size:2.1rem;\n  }\n\n  .bh-grid{\n    gap:.5rem;\n  }\n}\n\n@media(max-width:480px){\n  .bh-title{\n    font-size:1.8rem;\n  }\n\n  .bh-spec-row{\n    grid-template-columns:minmax(0,40%) minmax(0,60%);\n  }\n\n  .bh-spec-label,\n  .bh-spec-value{\n    padding:.48rem;\n    font-size:.8rem;\n  }\n}\n\u003c\/style\u003e\n\u003cdiv itemtype=\"https:\/\/schema.org\/Product\" itemscope=\"\" class=\"bh-wrap\"\u003e\n\u003cspan class=\"bh-eyebrow\"\u003eBackert Labs\u003c\/span\u003e\n\u003ch1 itemprop=\"name\" class=\"bh-title\"\u003eBackert Labs Optik Phono Equalizer for DS Audio Cartridges\u003c\/h1\u003e\n\u003cp class=\"bh-intro\"\u003eTube Optical-Cartridge Equalizer • Two DS Audio Cartridge Inputs • Two NOS 12AU7 Tubes • Selectable Gain • Balanced and Unbalanced Outputs • Three GreenForce Power Supplies • Made in Pennsylvania\u003c\/p\u003e\n\u003cdiv class=\"bh-order-note\"\u003e\n\u003cstrong\u003eBuilt to Order\u003c\/strong\u003e The Backert Labs Optik Phono Equalizer for DS Audio Cartridges is built to order. The typical lead time is approximately 10–14 business days before shipment.\u003c\/div\u003e\n\u003cdiv class=\"bh-grid\"\u003e\n\u003c!-- LEFT COLUMN --\u003e\n\u003cdiv class=\"bh-main\"\u003e\n\u003csection class=\"bh-section\" id=\"overview\"\u003e\n\u003ch2\u003eReference Tube Equalization Created Exclusively for DS Audio Optical Cartridges\u003c\/h2\u003e\n\u003cp itemprop=\"description\"\u003eThe \u003cstrong\u003eBackert Labs Optik Phono Equalizer for DS Audio Cartridges\u003c\/strong\u003e is a purpose-built analog component designed to reveal the speed, clarity and exceptionally low moving mass of DS Audio optical cartridges. Unlike a conventional phono preamplifier, it supplies the light-source power and specialized equalization required by the optical-cartridge system. Two independent RCA inputs allow two compatible cartridges or tonearms to remain connected, with convenient selection available from the front panel.\u003c\/p\u003e\n\u003cp\u003eBackert Labs combines a tube-based audio circuit with three patented GreenForce power supplies to create a spacious, dynamic and naturally textured presentation. Separate left- and right-channel supplies power the dual-mono audio circuitry, while a third dedicated supply powers the cartridge’s photo detector. Each unit is built to order by hand in Pennsylvania, with a typical lead time of approximately 10–14 business days before shipment.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"bh-section\" id=\"highlights\"\u003e\n\u003ch2\u003eHighlights \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul class=\"bh-bullets\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesigned for DS Audio Cartridges\u003c\/strong\u003e — Provides the specialized power and equalization required by compatible DS Audio optical cartridges.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo Optical-Cartridge Inputs\u003c\/strong\u003e — Connect two DS Audio-equipped tonearms and switch between them directly from the front panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTube-Based Signal Circuit\u003c\/strong\u003e — Two NOS 12AU7-type tubes contribute natural tonal color, dimensional imaging and expressive dynamics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree GreenForce Power Supplies\u003c\/strong\u003e — Separate supplies power the left audio channel, right audio channel and cartridge photo detector.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible System Connectivity\u003c\/strong\u003e — Balanced XLR and unbalanced RCA outputs support a wide variety of premium line stages and integrated amplifiers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection class=\"bh-section\" id=\"technology\"\u003e\n\u003ch2\u003eTechnology \u0026amp; Design\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDual-Mono GreenForce Audio Supplies\u003c\/strong\u003e — Independent GreenForce power supplies serve the left- and right-channel audio circuits. This dual-mono arrangement reduces interaction between channels and supports stable imaging, low noise and greater musical separation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDedicated Optical-Cartridge Supply\u003c\/strong\u003e — A third GreenForce supply is reserved exclusively for the photo detector inside the connected DS Audio cartridge. Keeping this supply separate from the audio stages helps prevent the optical system’s power requirements from interfering with the music signal.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRhythm-Derived Tube Amplification\u003c\/strong\u003e — The \u003cstrong\u003eBackert Labs Optik Phono Equalizer for DS Audio Cartridges\u003c\/strong\u003e incorporates tube-circuit technology developed for the company’s reference line-stage preamplifiers. Two automatically biased 12AU7 tubes operate under gentle conditions intended to support consistent performance and extended tube life.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePremium Mechanical Construction\u003c\/strong\u003e — The Optik Phono uses an American-machined aluminum chassis, a solid-brass circuit-board support panel and isolation feet designed to reduce unwanted mechanical vibration. Solid-silver wiring is used in key areas of the internal signal path.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"bh-section bh-faq\" id=\"faq\"\u003e\n\u003ch2\u003eFAQ — Backert Labs Optik Phono Equalizer\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs the Backert Labs Optik Phono built to order?\u003c\/summary\u003e\n\u003cp\u003eYes. This product is built to order. The typical lead time is approximately 10–14 business days before shipment.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan it be used with moving-magnet or moving-coil cartridges?\u003c\/summary\u003e\n\u003cp\u003eNo. The \u003cstrong\u003eBackert Labs Optik Phono Equalizer for DS Audio Cartridges\u003c\/strong\u003e is designed specifically for DS Audio optical cartridges. Conventional MM and MC cartridges require a traditional phono preamplifier.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan two DS Audio cartridges be connected at the same time?\u003c\/summary\u003e\n\u003cp\u003eYes. The two stereo RCA inputs allow two compatible DS Audio cartridges or tonearms to remain connected. The desired cartridge can be selected from the front panel.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs a separate DS Audio equalizer required?\u003c\/summary\u003e\n\u003cp\u003eNo. The Backert Labs Optik Phono provides the cartridge power and equalization required by compatible DS Audio optical cartridges, replacing the need for a separate DS Audio equalizer.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection class=\"bh-section\" id=\"why-buy\"\u003e\n\u003ch2\u003eWhy Buy From Us\u003c\/h2\u003e\n\u003cul class=\"bh-bullets\"\u003e\n\u003cli\u003eAuthorized Backert Labs Dealer\u003c\/li\u003e\n\u003cli\u003e5% Reward Points on Every Purchase\u003c\/li\u003e\n\u003cli\u003ePrice Match Guarantee\u003c\/li\u003e\n\u003cli\u003eExpert DS Audio Cartridge Matching, Turntable Setup and System Integration Support\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection class=\"bh-section\" id=\"related\"\u003e\n\u003ch2\u003eRelated Products \u0026amp; Accessories\u003c\/h2\u003e\n\u003cul class=\"bh-bullets\"\u003e\n\u003cli\u003eBackert Labs Rhythm 1.4 Preamplifier\u003c\/li\u003e\n\u003cli\u003eBackert Labs Rhumba Extreme 1.4 Preamplifier\u003c\/li\u003e\n\u003cli\u003eBackert Labs Rhumba 1.4 Preamplifier\u003c\/li\u003e\n\u003cli\u003eBackert Labs Rhumba XPhono 1.1 Tube Phono Preamplifier\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c!-- RIGHT COLUMN --\u003e\n\u003cdiv class=\"bh-side\"\u003e\n\u003csection class=\"bh-section\" id=\"specs\"\u003e\n\u003ch2\u003eBackert Labs Optik Phono Specifications\u003c\/h2\u003e\n\u003cdiv aria-label=\"Backert Labs Optik Phono specifications\" role=\"table\" class=\"bh-specs\"\u003e\n\u003cdiv role=\"row\" class=\"bh-spec-row\"\u003e\n\u003cdiv role=\"rowheader\" class=\"bh-spec-label\"\u003eProduct Type\u003c\/div\u003e\n\u003cdiv role=\"cell\" class=\"bh-spec-value\"\u003eTube equalizer and power supply for DS Audio optical cartridges\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv role=\"row\" class=\"bh-spec-row\"\u003e\n\u003cdiv role=\"rowheader\" class=\"bh-spec-label\"\u003eModel\u003c\/div\u003e\n\u003cdiv role=\"cell\" class=\"bh-spec-value\"\u003eOptik Phono 1.1\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv role=\"row\" class=\"bh-spec-row\"\u003e\n\u003cdiv role=\"rowheader\" class=\"bh-spec-label\"\u003eAvailability\u003c\/div\u003e\n\u003cdiv role=\"cell\" class=\"bh-spec-value\"\u003eBuilt to order\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv role=\"row\" class=\"bh-spec-row\"\u003e\n\u003cdiv role=\"rowheader\" class=\"bh-spec-label\"\u003eTypical Lead Time\u003c\/div\u003e\n\u003cdiv role=\"cell\" class=\"bh-spec-value\"\u003eApproximately 10–14 business days before shipment\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv role=\"row\" class=\"bh-spec-row\"\u003e\n\u003cdiv role=\"rowheader\" class=\"bh-spec-label\"\u003eCartridge Compatibility\u003c\/div\u003e\n\u003cdiv role=\"cell\" class=\"bh-spec-value\"\u003eDS Audio optical cartridges only\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv role=\"row\" class=\"bh-spec-row\"\u003e\n\u003cdiv role=\"rowheader\" class=\"bh-spec-label\"\u003eCartridge Inputs\u003c\/div\u003e\n\u003cdiv role=\"cell\" class=\"bh-spec-value\"\u003e2 × stereo RCA input pairs\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv role=\"row\" class=\"bh-spec-row\"\u003e\n\u003cdiv role=\"rowheader\" class=\"bh-spec-label\"\u003eInput Selection\u003c\/div\u003e\n\u003cdiv role=\"cell\" class=\"bh-spec-value\"\u003eFront-panel Input 1 \/ Input 2 selector\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv role=\"row\" class=\"bh-spec-row\"\u003e\n\u003cdiv role=\"rowheader\" class=\"bh-spec-label\"\u003eUnused Input Management\u003c\/div\u003e\n\u003cdiv role=\"cell\" class=\"bh-spec-value\"\u003eThe unselected cartridge’s light source is automatically deactivated\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv role=\"row\" class=\"bh-spec-row\"\u003e\n\u003cdiv role=\"rowheader\" class=\"bh-spec-label\"\u003eGain Settings\u003c\/div\u003e\n\u003cdiv role=\"cell\" class=\"bh-spec-value\"\u003eHigh and low\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv role=\"row\" class=\"bh-spec-row\"\u003e\n\u003cdiv role=\"rowheader\" class=\"bh-spec-label\"\u003eGain Selection\u003c\/div\u003e\n\u003cdiv role=\"cell\" class=\"bh-spec-value\"\u003eFront-panel selector\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv role=\"row\" class=\"bh-spec-row\"\u003e\n\u003cdiv role=\"rowheader\" class=\"bh-spec-label\"\u003eCircuit Type\u003c\/div\u003e\n\u003cdiv role=\"cell\" class=\"bh-spec-value\"\u003eTube amplification circuit derived from Backert Labs line-stage technology\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv role=\"row\" class=\"bh-spec-row\"\u003e\n\u003cdiv role=\"rowheader\" class=\"bh-spec-label\"\u003eTube Complement\u003c\/div\u003e\n\u003cdiv role=\"cell\" class=\"bh-spec-value\"\u003e2 × 12AU7 or compatible equivalent tubes\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv role=\"row\" class=\"bh-spec-row\"\u003e\n\u003cdiv role=\"rowheader\" class=\"bh-spec-label\"\u003eTube Bias\u003c\/div\u003e\n\u003cdiv role=\"cell\" class=\"bh-spec-value\"\u003eAutomatic continuous bias adjustment\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv role=\"row\" class=\"bh-spec-row\"\u003e\n\u003cdiv role=\"rowheader\" class=\"bh-spec-label\"\u003eTube Access\u003c\/div\u003e\n\u003cdiv role=\"cell\" class=\"bh-spec-value\"\u003eTop-panel tube-access door\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv role=\"row\" class=\"bh-spec-row\"\u003e\n\u003cdiv role=\"rowheader\" class=\"bh-spec-label\"\u003eAudio Power Supplies\u003c\/div\u003e\n\u003cdiv role=\"cell\" class=\"bh-spec-value\"\u003e2 × patented GreenForce supplies in dual-mono configuration\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv role=\"row\" class=\"bh-spec-row\"\u003e\n\u003cdiv role=\"rowheader\" class=\"bh-spec-label\"\u003ePhoto-Detector Supply\u003c\/div\u003e\n\u003cdiv role=\"cell\" class=\"bh-spec-value\"\u003eSeparate patented GreenForce power supply\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv role=\"row\" class=\"bh-spec-row\"\u003e\n\u003cdiv role=\"rowheader\" class=\"bh-spec-label\"\u003eBalanced Output\u003c\/div\u003e\n\u003cdiv role=\"cell\" class=\"bh-spec-value\"\u003e1 × stereo XLR output pair\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv role=\"row\" class=\"bh-spec-row\"\u003e\n\u003cdiv role=\"rowheader\" class=\"bh-spec-label\"\u003eUnbalanced Output\u003c\/div\u003e\n\u003cdiv role=\"cell\" class=\"bh-spec-value\"\u003e1 × stereo RCA output pair\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv role=\"row\" class=\"bh-spec-row\"\u003e\n\u003cdiv role=\"rowheader\" class=\"bh-spec-label\"\u003eMute\u003c\/div\u003e\n\u003cdiv role=\"cell\" class=\"bh-spec-value\"\u003eFront-panel mute control\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv role=\"row\" class=\"bh-spec-row\"\u003e\n\u003cdiv role=\"rowheader\" class=\"bh-spec-label\"\u003eFront-Panel Controls\u003c\/div\u003e\n\u003cdiv role=\"cell\" class=\"bh-spec-value\"\u003eInput selection, gain selection, mute and power\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv role=\"row\" class=\"bh-spec-row\"\u003e\n\u003cdiv role=\"rowheader\" class=\"bh-spec-label\"\u003eInternal Signal Wiring\u003c\/div\u003e\n\u003cdiv role=\"cell\" class=\"bh-spec-value\"\u003eSolid-silver wiring in key areas of the signal path\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv role=\"row\" class=\"bh-spec-row\"\u003e\n\u003cdiv role=\"rowheader\" class=\"bh-spec-label\"\u003eCircuit-Board Support\u003c\/div\u003e\n\u003cdiv role=\"cell\" class=\"bh-spec-value\"\u003eSolid unfinished brass bottom panel\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv role=\"row\" class=\"bh-spec-row\"\u003e\n\u003cdiv role=\"rowheader\" class=\"bh-spec-label\"\u003eIsolation Feet\u003c\/div\u003e\n\u003cdiv role=\"cell\" class=\"bh-spec-value\"\u003eIsoAcoustics GAIA feet\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv role=\"row\" class=\"bh-spec-row\"\u003e\n\u003cdiv role=\"rowheader\" class=\"bh-spec-label\"\u003eChassis Construction\u003c\/div\u003e\n\u003cdiv role=\"cell\" class=\"bh-spec-value\"\u003eUSA-machined aluminum chassis\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv role=\"row\" class=\"bh-spec-row\"\u003e\n\u003cdiv role=\"rowheader\" class=\"bh-spec-label\"\u003eStandard Body Finish\u003c\/div\u003e\n\u003cdiv role=\"cell\" class=\"bh-spec-value\"\u003eBlack\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv role=\"row\" class=\"bh-spec-row\"\u003e\n\u003cdiv role=\"rowheader\" class=\"bh-spec-label\"\u003eFaceplate Finishes\u003c\/div\u003e\n\u003cdiv role=\"cell\" class=\"bh-spec-value\"\u003eBlack or silver\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv role=\"row\" class=\"bh-spec-row\"\u003e\n\u003cdiv role=\"rowheader\" class=\"bh-spec-label\"\u003eManufacturing\u003c\/div\u003e\n\u003cdiv role=\"cell\" class=\"bh-spec-value\"\u003eDesigned and built by hand in Pennsylvania, USA\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv role=\"row\" class=\"bh-spec-row\"\u003e\n\u003cdiv role=\"rowheader\" class=\"bh-spec-label\"\u003eQuantity\u003c\/div\u003e\n\u003cdiv role=\"cell\" class=\"bh-spec-value\"\u003eEach\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv role=\"row\" class=\"bh-spec-row\"\u003e\n\u003cdiv role=\"rowheader\" class=\"bh-spec-label\"\u003eBrand\u003c\/div\u003e\n\u003cdiv role=\"cell\" class=\"bh-spec-value\"\u003eBackert Labs\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"bh-section\" id=\"whats-in-the-box\"\u003e\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul class=\"bh-bullets\"\u003e\n\u003cli\u003e1 × Backert Labs Optik Phono Equalizer for DS Audio Cartridges\u003c\/li\u003e\n\u003cli\u003e2 × NOS 12AU7-Type Vacuum Tubes\u003c\/li\u003e\n\u003cli\u003e1 × Detachable AC Power Cable\u003c\/li\u003e\n\u003cli\u003e1 × Owner’s Documentation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eTurntable, tonearm, DS Audio optical cartridge, line-stage preamplifier, integrated amplifier and interconnect cables are sold separately.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cmeta itemprop=\"brand\" content=\"Backert Labs\"\u003e \u003cmeta itemprop=\"model\" content=\"Optik Phono 1.1\"\u003e \u003cmeta itemprop=\"category\" content=\"Optical Cartridge Equalizers, Tube Phono Equalizers, DS Audio Cartridge Equalizers, High-End Analog Components\"\u003e\n\u003c\/div\u003e","brand":"Backert Labs","offers":[{"title":"Silver \/ Black","offer_id":54394698137966,"sku":"BACOPTIKSLVBLK","price":11500.0,"currency_code":"USD","in_stock":true},{"title":"Silver \/ Red","offer_id":54394698170734,"sku":"BACOPTIKSLVRED","price":11800.0,"currency_code":"USD","in_stock":true},{"title":"Silver \/ Blue","offer_id":54394698203502,"sku":"BACOPTIKSLVBLU","price":11800.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ Black","offer_id":54394698236270,"sku":"BACOPTIKBLKBLK","price":11500.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ Red","offer_id":54394698269038,"sku":"BACOPTIKBLKRED","price":11800.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ Blue","offer_id":54394698301806,"sku":"BACOPTIKBLKBLU","price":11800.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0583\/1537\/4703\/files\/backert-labs-optik-phono-equalizer-for-ds-audio-cartridges.webp?v=1785164644"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0583\/1537\/4703\/collections\/backert-labs-phono-pre-amps.webp?v=1794339917","url":"https:\/\/audiolab.com\/collections\/backert-labs-phono-pre-amps.oembed","provider":"Audiolab","version":"1.0","type":"link"}