{"product_id":"ladder-chopin-ii-desktop-dac-amp","title":"LADDER Chopin II Desktop R2R Pre-amplifier","description":"\u003ch1\u003e\u003cstrong\u003eBalanced line-stage preamplifier\u003c\/strong\u003e\u003c\/h1\u003e\n\u003cp\u003eThe Ladder Chopin II is a fully-balanced, fully discrete Class-A line-stage preamplifier with precise analog volume control and low-noise power delivery. It combines XLR and RCA connectivity, a microprocessor-controlled 60-step relay attenuator, precision-matched components, a 65W toroidal transformer, and remote operation in an aluminum-alloy chassis.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eFully-balanced Class-A architecture\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe Chopin II uses a fully-balanced differential amplification circuit with discrete field-effect transistors for output amplification. The signal path is designed for strong noise rejection and consistent channel balance, with a specified signal-to-noise ratio of 120 dB and stereo crosstalk of -110 dB.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003e60-step relay volume control\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eA microprocessor-controlled, relay-based 60-step attenuator handles volume adjustment. Precision-matched resistors and components support accurate level changes and channel tracking, while the front-panel display provides a clear indication of the selected input and volume setting.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eLow-noise linear power supply\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eA 65W pure-copper toroidal transformer supplies the preamplifier, supported by a bank of ERSE capacitors. Eight independently regulated power supplies distribute power throughout the circuitry to help maintain stable operating conditions and limit electrical noise.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eBalanced and single-ended connectivity\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe rear panel provides two balanced XLR input pairs and one RCA input pair for source components. Outputs are available through both balanced XLR and single-ended RCA connections, making the Chopin II suitable for integration with a range of power amplifiers and active audio systems.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eGold-plated RCA terminals\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eGold-plated single-crystal copper RCA terminals provide the single-ended analog connections. The connector design complements the preamplifier’s emphasis on precision components throughout the analog signal path.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eFront-panel controls and display\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe left control provides power, source selection, standby, and mute functions, while the right control adjusts volume. A central display shows operating information at a glance. Remote control is also supported for convenient adjustment from the listening position.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eCompact aluminum-alloy chassis\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe aluminum-alloy enclosure keeps the component relatively compact while accommodating the discrete audio circuitry and substantial linear power supply. The product imagery specifies chassis dimensions of 12.6 x 13.0 x 2.4 in (320 x 330 x 60 mm).\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eProduct highlights\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePure Class-A, fully discrete line stage\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFully-balanced differential circuit architecture\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eMicroprocessor-controlled 60-step relay attenuator\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePrecision-matched resistors and components\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e65W pure-copper toroidal transformer\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eEight independently regulated power supplies\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eLow-noise ERSE capacitor bank\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eTwo balanced XLR input pairs\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eOne stereo RCA input\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eBalanced XLR and single-ended RCA outputs\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eGold-plated single-crystal copper RCA terminals\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFront-panel display\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eRemote control\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eAluminum-alloy chassis\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eSpecs\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eProduct name: Ladder Chopin II\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eAmplifier architecture: Pure Class-A, fully-balanced, fully discrete line stage\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eVolume control: 60-step microprocessor-controlled relay attenuator\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eInputs: 2 x stereo XLR, 1 x stereo RCA\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eInput impedance: 12.2 kΩ single-ended, 60 kΩ balanced\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eOutputs: Stereo RCA, stereo XLR\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eOutput level: 2.0 Vrms RCA, 4.0 Vrms XLR\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eOutput impedance: 200 Ω single-ended, 400 Ω balanced\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eGain: Unity gain, 0 dB\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFrequency response: 10 Hz–80 kHz, -0.3 dB\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eTHD+N: 0.00% as specified by manufacturer\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSNR: 120 dB\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eDynamic range: Greater than 121 dB\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eStereo crosstalk: -110 dB\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePower supply: 65W toroidal transformer\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eAC power requirement: 100–240 VAC, 50\/60 Hz\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePower consumption: 1W idle, 20W operational\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eChassis material: Aluminum alloy\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eDimensions: 12.6 x 13.0 x 2.4 in (320 x 330 x 60 mm)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eNet weight: 14.3 lb (6.5 kg)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eGross weight: 21.4 lb (9.7 kg)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eAvailable colors: Silver, black\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eWarranty: 12 months\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eWhat’s included\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eLadder Chopin II preamplifier\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eRemote control\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"LADDER","offers":[{"title":"Black","offer_id":48186201276652,"sku":"APS-1373-1","price":1545.0,"currency_code":"USD","in_stock":false},{"title":"Silver","offer_id":48186201309420,"sku":"APS-1373-2","price":1545.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/Chopin-II-_4.jpg?v=1790609596","url":"https:\/\/apos.audio\/products\/ladder-chopin-ii-desktop-dac-amp","provider":"Apos","version":"1.0","type":"link"}