{"product_id":"backert-labs-rhythm-1-4a-preamplifier","title":"Backert Labs Rhythm 1.4a Preamplifier","description":"\u003c!-- ======================================================\nBackert Labs Rhythm 1.4a Preamplifier\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 specifications 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 Rhythm 1.4a Preamplifier\u003c\/h1\u003e\n\u003cp class=\"bh-intro\"\u003eFlagship Class A Tube Linestage • New 1.4a Pure Silver Wiring • New Chassis Ground Technology • Revised Circuit Board Layouts • Patented GreenForce Power Supply • Dual-Mono Transformer Windings • Fluoropolymer Power-Supply Capacitors • Fully Balanced XLR Connectivity • Two 12AU7-Family Tubes • IsoAcoustics Gaia Feet\u003c\/p\u003e\n\u003cdiv class=\"bh-order-note\"\u003e\n\u003cstrong\u003eBuilt to Order:\u003c\/strong\u003e The Backert Labs Rhythm 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 Rhythm 1.4a — Flagship Tube Linestage Performance\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eBackert Labs Rhythm 1.4a Preamplifier\u003c\/strong\u003e is the flagship expression of Backert Labs' approach to high-performance tube linestage design. Building on the Rhythm 1.4 platform, the new 1.4a adds pure silver wire in select areas, new chassis-ground technology and redesigned circuit-board layouts intended to further improve clarity, texture and stereo imaging while retaining the advanced GreenForce power supply, proprietary Class A gain stage and premium mechanical construction of the established Rhythm.\u003c\/p\u003e\n\u003cp\u003eTwo carefully selected 12AU7-family tubes operate within a zero-negative-feedback signal path supported by a power supply engineered specifically for speed, low noise and dynamic accuracy. Fully balanced XLR connectivity, dual-mono transformer windings, fluoropolymer power-supply capacitors, a solid-brass circuit-board support panel, IsoAcoustics Gaia feet, automatic tube bias and an all-machined aluminum chassis make the Rhythm 1.4a Backert Labs' most ambitious linestage for reference-level two-channel 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 — Pure silver wire is used in select areas to improve clarity, musical texture and low-level resolution.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Chassis Ground Technology\u003c\/strong\u003e — The 1.4a revision incorporates new grounding technology designed to further refine signal integrity and background quietness.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRevised 1.4a Circuit Board Layouts\u003c\/strong\u003e — New circuit-board layouts are specifically intended to improve stereo imaging and spatial presentation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlagship GreenForce Power Supply\u003c\/strong\u003e — Backert Labs' patented supply architecture allows premium fluoropolymer capacitors to be used in the raw B+ supply for fast transient response and exceptional dynamic capability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Mono Architecture\u003c\/strong\u003e — Separate transformer windings for the left and right channels preserve channel separation through the power supply for a wide, dimensional soundstage.\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 Rhythm 1.4a Preamplifier\u003c\/strong\u003e retains the core engineering of the Rhythm 1.4 while introducing the newest Backert Labs refinements. Pure silver wire is incorporated in select locations to improve clarity and texture, revised chassis-ground technology addresses grounding behavior, and newly developed circuit-board layouts are intended to further improve imaging.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePatented GreenForce Power Supply\u003c\/strong\u003e — Rhythm uses Backert Labs' GreenForce architecture to actively regulate and deliver power to the gain stage. Its flagship implementation incorporates premium fluoropolymer capacitors in the raw B+ supply, an unusual approach made possible by the GreenForce design and selected for its speed, low dielectric absorption and transient performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eClass A Gain Stage with Automatic Bias\u003c\/strong\u003e — Two 12AU7 or equivalent tubes operate at exceptionally low voltage within Backert Labs' proprietary Class A gain circuit. The design uses zero global or local negative feedback, while automatic and continuous tube-bias adjustment maintains appropriate operating conditions throughout the tubes' service life.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eReference Mechanical Construction\u003c\/strong\u003e — The Rhythm chassis is machined from solid aluminum and uses a solid-brass bottom panel to support the circuit board. IsoAcoustics Gaia feet provide mechanical isolation, while a top-mounted acrylic tube door allows the two tubes to be changed without tools.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"bh-section bh-faq\" id=\"faq\"\u003e\n\u003ch2\u003eFAQ — Backert Labs Rhythm 1.4a\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is new about the Rhythm 1.4a?\u003c\/summary\u003e\n\u003cp\u003eThe Rhythm 1.4a adds three principal improvements to the 1.4 platform: pure silver wire in select areas for improved clarity and texture, new chassis-ground technology, and new circuit-board layouts designed to improve imaging.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs the Rhythm 1.4a built to order?\u003c\/summary\u003e\n\u003cp\u003eYes. This \u003cstrong\u003eBackert Labs Rhythm 1.4a Preamplifier\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 Rhythm 1.4a use?\u003c\/summary\u003e\n\u003cp\u003eThe Rhythm 1.4a uses only two 12AU7 or equivalent tubes. Backert Labs selects its stock tubes for low noise and musical performance, while automatic bias helps maintain appropriate operating conditions.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan the Rhythm 1.4a be integrated into a home theater system?\u003c\/summary\u003e\n\u003cp\u003eYes. A dedicated RCA Home Theater Bypass input passes the front-channel signal from a compatible processor or A\/V receiver without requiring the Rhythm to be powered on, so its tubes do not need to remain energized during home theater playback.\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 Reference 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 Rhumba 1.4a Preamp\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 Rhythm 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\"\u003eFlagship vacuum-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\"\u003eRhythm 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 tube linestage\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 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\"\u003eFrequency Response\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003e6Hz–108kHz, within 1.5dB\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eTHD + Noise\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003e0.09%\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eSignal-to-Noise Ratio\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003e98dB; 90dB referenced to 1V output\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eInput Impedance\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003e34k 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\"\u003eOutput Impedance\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eBelow 80 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\"\u003eCrosstalk\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003e78dB\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, fixed output\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; does not require preamp 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\"\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\"\u003eVolume Control\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eAnalog volume control with remote operation\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 Backert Labs GreenForce 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\"\u003ePower-Supply Capacitors\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003ePremium fluoropolymer capacitors in raw B+ 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\"\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\"\u003eTransformer Architecture\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eSeparate windings for left and right channels\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eIEC Power Inlet\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eFurutech IEC connector\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\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eMachined solid-aluminum construction\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 Board Support\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eSolid-brass bottom panel\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 Gaia 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\"\u003eSubtle LED on 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 up\/down and mute\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 Finish\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003eEntire chassis available in Black 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\"\u003eDimensions\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003e17 × 14 × 5 in.\u003cbr\u003eW × D × H\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eWeight\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003e29 lbs.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-row\" role=\"row\"\u003e\n\u003cdiv class=\"bh-spec-label\" role=\"rowheader\"\u003eIdle Power Consumption\u003c\/div\u003e\n\u003cdiv class=\"bh-spec-value\" role=\"cell\"\u003e31 watts\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, machined and assembled 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 Rhythm 1.4a Preamplifier\u003c\/li\u003e\n\u003cli\u003e2 × Selected 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 × Set of IsoAcoustics Gaia Isolation Feet, 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","offer_id":54662699286894,"sku":"BACRHYTHM14aSLV","price":14500.0,"currency_code":"USD","in_stock":true},{"title":"Black","offer_id":54662699319662,"sku":"BACRHYTHM14aBLK","price":14500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0583\/1537\/4703\/files\/backert-labs-rhythm-1-4-preamplifier.webp?v=1785158870","url":"https:\/\/audiolab.com\/products\/backert-labs-rhythm-1-4a-preamplifier","provider":"Audiolab","version":"1.0","type":"link"}