{"product_id":"mcintosh-c12000-2-channel-preamplifier","title":"McIntosh C12000 2-Channel Preamplifier","description":"\u003ch1\u003eMcIntosh C12000 2-Channel Preamplifier\u003c\/h1\u003e\n\u003ch3\u003eTwo-chassis preamplifier with selectable vacuum tube and solid-state outputs, fully balanced circuitry, and configurable phono stages\u003c\/h3\u003e\n\u003cp\u003eThe McIntosh C12000 is a two-chassis preamplifier that separates its audio circuitry from its control and power functions. The C12000 Controller houses power control, data ports, external control connections, and dual isolated power supplies, while the C12000 Preamplifier contains the signal circuitry and all analog audio connections. The two units are linked by specially designed shielded umbilical cables and operate together as a single component.\u003c\/p\u003e\n\u003cp\u003eInside both chassis, the left and right channels are electrically and mechanically isolated for true dual-mono operation. The audio circuitry is fully balanced, while McIntosh Hybrid Drive technology gives the user a choice of vacuum tube or solid-state output. The tube output stage uses six tubes—two 12AT7s and one 12AX7A per channel—while the solid-state output uses a discrete balanced op-amp.\u003c\/p\u003e\n\u003cp\u003eThe C12000 provides 12 analog inputs: six balanced, four unbalanced, and two phono. Both phono inputs can be independently configured for Moving Coil or Moving Magnet cartridges, with adjustable resistance and capacitance loading as well as gain settings from 40 dB to 64 dB. The phonostage itself uses four 12AX7A tubes in a fully balanced configuration with RIAA equalization.\u003c\/p\u003e\n\u003cp\u003eFour analog outputs provide considerable system flexibility. Separate balanced outputs are provided for the vacuum tube and solid-state signal paths, while a fixed unbalanced output and programmable unbalanced output are also included. A High Drive headphone amplifier with Headphone Crossfeed Director and Home Theater PassThru round out a preamplifier designed to accommodate both simple and highly elaborate two-channel systems.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003ch4\u003eTwo-Chassis Architecture\u003c\/h4\u003e\n\u003cp\u003eThe C12000 separates its audio circuitry from its control and power functions. The C12000 Controller handles system control, power, and external connections, while the C12000 Preamplifier chassis is dedicated to the audio signal path.\u003c\/p\u003e\n\u003ch4\u003eHybrid Drive\u003c\/h4\u003e\n\u003cp\u003eMcIntosh Hybrid Drive provides both vacuum tube and solid-state output stages. The user can select either signal path to suit the rest of the system or personal listening preferences.\u003c\/p\u003e\n\u003ch4\u003eVacuum Tube Output Stage\u003c\/h4\u003e\n\u003cp\u003eSix tubes are used for the high-level vacuum tube preamplifier section, with two 12AT7 tubes and one 12AX7A assigned to each channel.\u003c\/p\u003e\n\u003ch4\u003eFully Balanced Dual-Mono Design\u003c\/h4\u003e\n\u003cp\u003eThe left and right channels are electrically and mechanically isolated within both chassis, while fully balanced circuitry helps maximize channel separation and reject common-mode noise.\u003c\/p\u003e\n\u003ch4\u003eTwo Configurable Phono Inputs\u003c\/h4\u003e\n\u003cp\u003eBoth phono inputs can be independently configured for Moving Coil or Moving Magnet cartridges. Resistance loading, capacitance loading, and gain are adjustable to accommodate a wide range of cartridges.\u003c\/p\u003e\n\u003ch4\u003eVacuum Tube Phonostage\u003c\/h4\u003e\n\u003cp\u003eFour 12AX7A tubes—two per channel—are used in the fully balanced phono section, which incorporates RIAA equalization for both Moving Coil and Moving Magnet cartridges.\u003c\/p\u003e\n\u003ch4\u003eSeparate Tube and Solid-State Outputs\u003c\/h4\u003e\n\u003cp\u003eDedicated balanced outputs are provided for the vacuum tube and solid-state signal paths, allowing either output stage to be selected without changing the rest of the system configuration.\u003c\/p\u003e\n\u003ch4\u003eHigh Drive Headphone Amplifier\u003c\/h4\u003e\n\u003cp\u003eThe front-panel 1\/4\" headphone output incorporates McIntosh High Drive circuitry and Headphone Crossfeed Director technology, with selectable settings for headphones from 16 to 600 ohms.\u003c\/p\u003e\n\u003ch4\u003eHome Theater PassThru\u003c\/h4\u003e\n\u003cp\u003eHome Theater PassThru allows the C12000 to be incorporated into a multichannel system while retaining its role as a dedicated two-channel preamplifier.\u003c\/p\u003e\n\u003ch4\u003eSystem Control\u003c\/h4\u003e\n\u003cp\u003eRS232, Power Control, Data Ports, and IR sensor connections provide integration with other McIntosh components and external control systems.\u003c\/p\u003e\n\u003ch3\u003eWhat’s Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMcIntosh C12000C Controller\u003c\/li\u003e\n\u003cli\u003eMcIntosh C12000ST Preamplifier\u003c\/li\u003e\n\u003cli\u003eRemote control\u003c\/li\u003e\n\u003cli\u003eShielded interconnect cables for the two chassis\u003c\/li\u003e\n\u003cli\u003eAC power cord\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eType:\u003c\/b\u003e Hybrid vacuum tube and solid-state stereo preamplifier\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eChannels:\u003c\/b\u003e 2\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eConfiguration:\u003c\/b\u003e Two chassis, C12000C Controller and C12000ST Preamplifier\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eHigh-Level Vacuum Tubes:\u003c\/b\u003e 2 × 12AX7A, 4 × 12AT7\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003ePhono Vacuum Tubes:\u003c\/b\u003e 4 × 12AX7A\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eTotal Harmonic Distortion:\u003c\/b\u003e 0.005% high level; 0.05% phono\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eFrequency Response:\u003c\/b\u003e 20 Hz–20 kHz, +0\/–0.5 dB; 10 Hz–100 kHz \u003cb\u003e(+0\/–3 dB)\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eRated Output:\u003c\/b\u003e 5 V balanced; 2.5 V unbalanced\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eMaximum Output:\u003c\/b\u003e 20 V RMS balanced; 10 V RMS unbalanced\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eHigh-Level Input Sensitivity:\u003c\/b\u003e 900 mV balanced; 450 mV unbalanced\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eMoving Coil Input Sensitivity:\u003c\/b\u003e 0.25–2.5 mV\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eMoving Magnet Input Sensitivity:\u003c\/b\u003e 5–10 mV\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eHigh-Level Signal-to-Noise Ratio:\u003c\/b\u003e 107 dB\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eMoving Coil Signal-to-Noise Ratio:\u003c\/b\u003e 79 dB\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eMoving Magnet Signal-to-Noise Ratio:\u003c\/b\u003e 83 dB\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eHigh-Level Voltage Gain:\u003c\/b\u003e 15 dB\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eMoving Coil Gain:\u003c\/b\u003e 58–64 dB\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eMoving Magnet Gain:\u003c\/b\u003e 40–46 dB\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eInput Impedance:\u003c\/b\u003e 50 kΩ balanced; 25 kΩ unbalanced\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eOutput Impedance:\u003c\/b\u003e 200 ohms balanced; 100 ohms unbalanced\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eBalanced Inputs:\u003c\/b\u003e 6\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eUnbalanced Inputs:\u003c\/b\u003e 4\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003ePhono Inputs:\u003c\/b\u003e 2, each configurable for Moving Coil or Moving Magnet\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eBalanced Variable Outputs:\u003c\/b\u003e 2, one solid state and one vacuum tube\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eUnbalanced Variable Outputs:\u003c\/b\u003e 1\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eUnbalanced Fixed Outputs:\u003c\/b\u003e 1\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eHeadphone Output:\u003c\/b\u003e 1\/4\" High Drive with Headphone Crossfeed Director\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eHeadphone Load Impedance:\u003c\/b\u003e Selectable 16–40, 40–150, or 150–600 ohms\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eInput Level Matching:\u003c\/b\u003e ±6 dB\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eHome Theater PassThru:\u003c\/b\u003e Yes\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eRS232 Control:\u003c\/b\u003e Yes\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003ePower Control Outputs:\u003c\/b\u003e 1 Main, 2 Output, 4 Trigger\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eData Ports:\u003c\/b\u003e 8\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eIR Sensor Input:\u003c\/b\u003e Yes\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eService Port:\u003c\/b\u003e 1\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eOutput Meters:\u003c\/b\u003e C12000ST only\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003ePower Consumption:\u003c\/b\u003e 75 W\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eDimensions, Each Module (H × W × D):\u003c\/b\u003e 6\" × 17-1\/2\" × 18\" (152.4 × 444.5 × 457 mm)\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eController Weight:\u003c\/b\u003e 27 lb. (12.3 kg)\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003ePreamplifier Weight:\u003c\/b\u003e 25 lb. (11.3 kg)\u003c\/p\u003e","brand":"McIntosh Labs","offers":[{"title":"Default Title","offer_id":54132212859064,"sku":"C12000","price":19000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1564\/1247\/files\/C12000CandSTFrontBalancedhires.jpg?v=1790796139","url":"https:\/\/upscaleaudio.com\/products\/mcintosh-c12000-2-channel-preamplifier","provider":"Upscale Audio","version":"1.0","type":"link"}