{"product_id":"backert-labs-rhumba-1-4a-preamp","title":"Backert Labs Rhumba 1.4a Preamp","description":"\u003c!-- ======================================================\nBackert Labs Rhumba 1.4a Preamp\nSEO-Optimized Shopify Product Page\n\nCURRENT 1.4a VERSION\nOverview Paragraphs: 2\nHighlights \u0026 Benefits: 5\nTechnology \u0026 Design: 4\nFAQ: 4\nRelated Products \u0026 Accessories: 4\nSpecifications: Scroll-Free CSS Grid\nBuilt-to-Order Note Included\nPricing \/ MSRP Removed\nDuplicate Product Microdata Removed\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  letter-spacing:.08em;\n  text-transform:uppercase;\n  font-size:.8rem;\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  margin:1rem 0 1.5rem;\n  padding:1rem 1.1rem;\n  border:1px solid #d1d5db;\n  border-radius:.5rem;\n  background:#f8fafc;\n}\n\n.bh-order-note strong{\n  font-weight:700;\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  float:none;\n}\n\n@media(min-width:900px){\n  .bh-grid{\n    grid-template-columns:minmax(0,64%) minmax(0,36%);\n    gap:2rem;\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\/* Scroll-free specification grid *\/\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\"\u003e\n\u003cspan class=\"bh-eyebrow\"\u003eBackert Labs\u003c\/span\u003e\n\u003ch1 class=\"bh-title\"\u003eBackert Labs Rhumba 1.4a Preamp\u003c\/h1\u003e\n\u003cp class=\"bh-intro\"\u003eClass A Tube Linestage • New 1.4a Pure Silver Wiring • New Chassis Ground Technology • Revised Circuit Board Layouts • Patented GreenForce Power Supply • Fully Balanced XLR Connectivity • Two 12AU7-Family Tubes • Zero Negative Feedback • Hand-Built in Pennsylvania\u003c\/p\u003e\n\u003cdiv class=\"bh-order-note\"\u003e\n\u003cstrong\u003eBuilt to Order:\u003c\/strong\u003e The Backert Labs Rhumba 1.4a is built to order. Typical lead time is approximately \u003cstrong\u003e10–14 business days\u003c\/strong\u003e 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\u003eBackert Labs Rhumba 1.4a — Refined Class A Tube Linestage Performance\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eBackert Labs Rhumba 1.4a Preamp\u003c\/strong\u003e is the newest evolution of Backert Labs' acclaimed Rhumba linestage, combining the company's patented GreenForce power supply with a pure Class A, zero-negative-feedback tube signal path. Building on the Rhumba 1.4 platform, the new 1.4a introduces pure silver wire in select areas, revised chassis-ground technology and redesigned circuit-board layouts intended to further improve clarity, texture and stereo imaging.\u003c\/p\u003e\n\u003cp\u003eTwo 12AU7-family tubes provide the gain, while fully balanced XLR and single-ended RCA connections make the Rhumba 1.4a easy to integrate with a wide range of high-end source components and power amplifiers. Home Theater Bypass, REC OUT, balance control, mono\/stereo operation, remote volume and mute, a top-mounted acrylic tube-access door and a custom toroidal transformer make it a highly versatile linestage without compromising Backert Labs' focus on simple, high-performance analog circuitry.\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\u003eNew 1.4a Pure Silver Wiring\u003c\/strong\u003e — Pure silver wire is used in select areas to improve clarity and musical texture.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Chassis Ground Technology\u003c\/strong\u003e — Revised grounding architecture is part of the latest 1.4a update, helping further refine low-level detail and signal integrity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Circuit Board Layouts\u003c\/strong\u003e — Redesigned board layouts are engineered to improve stereo imaging and spatial definition.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePatented GreenForce Power Supply\u003c\/strong\u003e — Backert Labs' proprietary supply architecture uses high-quality polypropylene capacitors and is designed for fast response to musical dynamics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Balanced Connectivity\u003c\/strong\u003e — Two fully balanced XLR inputs and two fully balanced XLR outputs complement three RCA inputs and two RCA output pairs.\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\u003eThe 1.4a Evolution\u003c\/strong\u003e — The \u003cstrong\u003eBackert Labs Rhumba 1.4a Preamp\u003c\/strong\u003e retains the core architecture of the Rhumba 1.4 while adding three specific revisions: pure silver wire in selected areas, new chassis-ground technology and new circuit-board layouts. Backert Labs developed these changes to improve clarity, texture and imaging rather than fundamentally change the Rhumba's established circuit philosophy.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGreenForce Power Supply\u003c\/strong\u003e — Backert Labs' patented GreenForce design actively delivers power to the amplification circuit and allows the use of premium polypropylene capacitors in the supply. The design is intended to respond rapidly to changes in musical demand and preserve timing, dynamics and transient accuracy.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eClass A Dynamic Linearity Gain Stage\u003c\/strong\u003e — Two 12AU7 or equivalent tubes operate in Backert Labs' proprietary Class A gain circuit with no global or local negative feedback. The circuit is designed for low distortion, strong dynamic expression and low output impedance, allowing the Rhumba to partner effectively with tube or solid-state power amplifiers.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAutomatic Tube Bias \u0026amp; Easy Tube Access\u003c\/strong\u003e — Backert Labs automatically and continuously adjusts tube bias, simplifying long-term ownership and helping compatible replacement tubes operate under appropriate conditions. The removable acrylic top door provides direct access to both tubes without removing the chassis cover.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"bh-section bh-faq\" id=\"faq\"\u003e\n\u003ch2\u003eFAQ — Backert Labs Rhumba 1.4a\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is new about the Rhumba 1.4a?\u003c\/summary\u003e\n\u003cp\u003eThe 1.4a adds pure silver wire in select areas for improved clarity and texture, new chassis-ground technology, and redesigned circuit-board layouts intended to improve imaging.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs the Rhumba 1.4a built to order?\u003c\/summary\u003e\n\u003cp\u003eYes. This \u003cstrong\u003eBackert Labs Rhumba 1.4a Preamp\u003c\/strong\u003e is built to order. Typical lead time is approximately 10–14 business days before shipment.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow many tubes does the Rhumba 1.4a use?\u003c\/summary\u003e\n\u003cp\u003eThe Rhumba 1.4a uses two 12AU7 or equivalent tubes. Backert Labs' automatic bias system helps maintain the proper operating conditions for the installed tubes.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan the Rhumba 1.4a be used in a home theater system?\u003c\/summary\u003e\n\u003cp\u003eYes. Its dedicated RCA Home Theater Bypass input can pass the front-channel signal from a compatible surround processor or A\/V receiver without requiring the Rhumba to be powered on.\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 Tube, Power Amplifier and High-End Two-Channel System Matching Support\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection class=\"bh-section\" id=\"related\"\u003e\n\u003ch2\u003eRelated Backert Labs Products\u003c\/h2\u003e\n\u003cul class=\"bh-bullets\"\u003e\n\u003cli\u003eBackert Labs Rhumba Extreme 1.4a Linestage Tube Preamp\u003c\/li\u003e\n\u003cli\u003eBackert Labs Rhythm 1.4a Preamplifier\u003c\/li\u003e\n\u003cli\u003eBackert Labs Rhumba XPhono 1.1 Tube Phono Preamplifier\u003c\/li\u003e\n\u003cli\u003eBackert Labs Optik 1.1 Phono Equalizer for DS Audio Cartridges\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 Rhumba 1.4a 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\"\u003eVacuum-tube linestage 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\"\u003eModel\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eRhumba 1.4a\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003e1.4a Silver-Wire Upgrade\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003ePure silver wire used in select areas\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003e1.4a Grounding Upgrade\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eNew chassis-ground 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\"\u003e1.4a Circuit Board Upgrade\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eNew circuit-board layouts designed for improved imaging\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eAmplification\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003ePure Class A\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\"\u003eNone — no 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\"\u003e2 × 12AU7 or equivalent 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 and continuously adjusted\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\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003e10dB\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eOutput Impedance\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eLow output impedance\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eTotal Inputs\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003e5 stereo input pairs\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 Inputs\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003e2 × fully balanced stereo XLR pairs\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eRCA Inputs\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003e3 × stereo RCA pairs\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 Outputs\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003e2 × fully balanced stereo XLR pairs\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eRCA Outputs\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003e2 × stereo RCA pairs\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eREC OUT\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003e1 × stereo RCA 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\"\u003eHome Theater Bypass\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003e1 × RCA input pair; preamp does not need to be powered on\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\"\u003eBalance, mute, mono\/stereo, input selector and volume\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\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003ePatented GreenForce power-supply architecture\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 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\"\u003eTube Access\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eTop-mounted acrylic 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\"\u003eRemote Control\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eHeavy metal handset with volume and mute control\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\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\"\u003eStandard Body\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\"\u003eOptional Body Colors\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eRed or Blue\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\"\u003eBuilt in the 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\"\u003eBuilt to Order\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eYes\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\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 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 Rhumba 1.4a Preamp\u003c\/li\u003e\n\u003cli\u003e2 × 12AU7-Family Tubes, Installed\u003c\/li\u003e\n\u003cli\u003e1 × Heavy Metal Remote Handset\u003c\/li\u003e\n\u003cli\u003e1 × Acrylic Tube Access Door, Installed\u003c\/li\u003e\n\u003cli\u003e1 × AC Power Cord\u003c\/li\u003e\n\u003cli\u003eOwner's Documentation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003ePower amplifier, source components, interconnect cables, loudspeakers and other system components are sold separately.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Backert Labs","offers":[{"title":"Silver \/ Black","offer_id":54662519456110,"sku":"BACRHUMBA14aSLVBLK","price":5800.0,"currency_code":"USD","in_stock":true},{"title":"Silver \/ Red","offer_id":54662519488878,"sku":"BACRHUMBA14aSLVRED","price":6100.0,"currency_code":"USD","in_stock":true},{"title":"Silver \/ Blue","offer_id":54662519521646,"sku":"BACRHUMBA14aSLVBLU","price":6100.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ Black","offer_id":54662519554414,"sku":"BACRHUMBA14aBLKBLK","price":5800.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ Red","offer_id":54662519587182,"sku":"BACRHUMBA14aBLKRED","price":6100.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ Blue","offer_id":54662519619950,"sku":"BACRHUMBA14aBLKBLU","price":6100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0583\/1537\/4703\/files\/backert-labs-rhumba-1-4-preamp.webp?v=1784915209","url":"https:\/\/audiolab.com\/products\/backert-labs-rhumba-1-4a-preamp","provider":"Audiolab","version":"1.0","type":"link"}