{"product_id":"backert-labs-rhumba-extreme-1-4a-linestage-tube-preamp","title":"Backert Labs Rhumba Extreme 1.4a Linestage Tube Preamp","description":"\u003c!-- ======================================================\nBackert Labs Rhumba Extreme 1.4a Linestage Tube 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\nMSRP \/ Pricing 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 Extreme 1.4a Linestage Tube Preamp\u003c\/h1\u003e\n\u003cp class=\"bh-intro\"\u003eReference Class A Tube Linestage • New 1.4a Pure Silver Wiring • New Chassis Ground Technology • Revised Circuit Board Layouts • Dual-Mono GreenForce Power Supply • Fully Balanced XLR Connectivity • Two 12AU7-Family Tubes • IsoAcoustics Gaia Feet • Solid Brass Bottom Panel\u003c\/p\u003e\n\u003cdiv class=\"bh-order-note\"\u003e\n\u003cstrong\u003eBuilt to Order:\u003c\/strong\u003e The Backert Labs Rhumba Extreme 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 Extreme 1.4a — Refined Tube Linestage Performance\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eBackert Labs Rhumba Extreme 1.4a Linestage Tube Preamp\u003c\/strong\u003e advances the acclaimed Rhumba Extreme platform with the latest refinements from Backert Labs. Building upon the dual-mono power architecture, Class A circuitry, fully balanced connectivity and premium mechanical construction of the Rhumba Extreme 1.4, the new 1.4a introduces pure silver wire in select areas, new chassis-ground technology and redesigned circuit-board layouts developed to further improve clarity, texture and stereo imaging.\u003c\/p\u003e\n\u003cp\u003eAt its core, the Rhumba Extreme remains Backert Labs' bridge between the Rhumba and flagship Rhythm. Two 12AU7-family tubes operate within a zero-negative-feedback Class A circuit supported by Backert Labs' patented GreenForce power-supply technology. Dual-mono regulation, premium polypropylene capacitors, a solid-brass bottom panel, IsoAcoustics Gaia isolation feet and extensive balanced and single-ended connectivity make the Rhumba Extreme 1.4a equally suited to ambitious tube, solid-state and hybrid high-end audio systems.\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 — Select areas now incorporate pure silver wire, an upgrade Backert Labs developed to improve clarity and musical texture.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Chassis Ground Technology\u003c\/strong\u003e — Revised grounding technology is part of the 1.4a update, building upon the already refined architecture of the Rhumba Extreme.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRevised 1.4a Circuit Board Layouts\u003c\/strong\u003e — New circuit-board layouts have been developed specifically to improve imaging and spatial presentation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Dual-Mono GreenForce Power Supply\u003c\/strong\u003e — Independent regulated power-supply paths for the left and right channels help maximize separation, dynamics and stereo dimensionality.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePremium Extreme Construction\u003c\/strong\u003e — A solid-brass bottom panel, IsoAcoustics Gaia isolation feet, automatic tube bias and premium polypropylene capacitors distinguish the Extreme architecture from the standard Rhumba.\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 new \u003cstrong\u003eBackert Labs Rhumba Extreme 1.4a Linestage Tube Preamp\u003c\/strong\u003e evolves the 1.4 rather than replacing its underlying design philosophy. Backert Labs specifies pure silver wiring in select locations for improved clarity and texture, new chassis-ground technology, and redesigned circuit-board layouts intended to deliver better imaging.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDual-Mono GreenForce Power Supply\u003c\/strong\u003e — The Extreme employs a fully dual-mono implementation of Backert Labs' patented GreenForce power-supply technology. Premium polypropylene capacitors are used extensively throughout the power supply, supporting the fast and dynamic presentation for which Backert Labs designs are known.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eClass A Tube Signal Path \u0026amp; Automatic Bias\u003c\/strong\u003e — Two 12AU7 or equivalent tubes operate within Backert Labs' Class A gain stage without global or local negative feedback. Automatic and continuous tube-bias adjustment maintains appropriate operating conditions as tubes age or when compatible replacement tubes are installed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBalanced Architecture \u0026amp; Premium Mechanical Design\u003c\/strong\u003e — Two fully balanced XLR input pairs and two fully balanced XLR output pairs accompany three RCA inputs and two RCA outputs. A solid-brass bottom panel provides a substantial foundation for the internal circuitry, while IsoAcoustics Gaia feet mechanically isolate the chassis from its supporting surface.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"bh-section bh-faq\" id=\"faq\"\u003e\n\u003ch2\u003eFAQ — Backert Labs Rhumba Extreme 1.4a\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is new about the Rhumba Extreme 1.4a?\u003c\/summary\u003e\n\u003cp\u003eThe 1.4a is the newest evolution of Backert Labs' 1.4 platform. Backert Labs specifies three principal improvements: pure silver wire in select areas to improve clarity and texture, new chassis-ground technology, and new circuit-board layouts developed to improve imaging.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs the Rhumba Extreme 1.4a built to order?\u003c\/summary\u003e\n\u003cp\u003eYes. This \u003cstrong\u003eBackert Labs Rhumba Extreme 1.4a Linestage Tube 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 Extreme 1.4a use?\u003c\/summary\u003e\n\u003cp\u003eThe Rhumba Extreme 1.4a uses two 12AU7 or equivalent tubes. Its automatic bias system continuously maintains the appropriate operating bias for the installed tubes.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan the Rhumba Extreme 1.4a be integrated into a home theater system?\u003c\/summary\u003e\n\u003cp\u003eYes. The rear panel includes a dedicated RCA Home Theater Bypass input. The bypass does not require the preamplifier to be powered on, making it easier to integrate a high-performance two-channel system with a compatible home theater processor or A\/V receiver.\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 1.4a Linestage Tube Preamplifier\u003c\/li\u003e\n\u003cli\u003eBackert Labs Rhythm 1.4a Linestage Tube 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 Extreme 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 Extreme 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\"\u003eClass 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\"\u003eZero 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\"\u003eBelow 100 ohms\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\"\u003eTotal Main Outputs\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003e4 stereo output 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\"\u003eExtreme Power Supply\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eDual-mono power supply\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eMusic-Signal Power-Supply Capacitors\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003ePolypropylene capacitors; no electrolytic capacitors\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 Capacitors\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eJantzen Silver polypropylene capacitors\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-made 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\"\u003eBottom Panel\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eSolid brass\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eIsolation Feet\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eIsoAcoustics 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\"\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\"\u003eVolume Indicator\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eLED-lighted volume knob\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 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\"\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 Extreme 1.4a Linestage Tube 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\u003eIsoAcoustics Isolation Feet, Installed\u003c\/li\u003e\n\u003cli\u003eAC 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":54662350537070,"sku":"BACRHUEXT14aSLVBLK","price":9400.0,"currency_code":"USD","in_stock":true},{"title":"Silver \/ Red","offer_id":54662350569838,"sku":"BACRHUEXT14aSLVRED","price":9700.0,"currency_code":"USD","in_stock":true},{"title":"Silver \/ Blue","offer_id":54662350602606,"sku":"BACRHUEXT14aSLVBLU","price":9700.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ Black","offer_id":54662350635374,"sku":"BACRHUEXT14aBLKBLK","price":9400.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ Red","offer_id":54662350668142,"sku":"BACRHUEXT14aBLKRED","price":9700.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ Blue","offer_id":54662350700910,"sku":"BACRHUEXT14aBLKBLU","price":9700.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0583\/1537\/4703\/files\/backert-labs-rhumba-extreme-1-4a-linestage-tube-preamp.webp?v=1787838663","url":"https:\/\/audiolab.com\/products\/backert-labs-rhumba-extreme-1-4a-linestage-tube-preamp","provider":"Audiolab","version":"1.0","type":"link"}