{"product_id":"mcintosh-ma252-hybrid-integrated-amplifier","title":"McIntosh MA252 Hybrid Integrated Amplifier 2x100W (8 ohms) with Tube Preamp \u0026 MM Phono Stage","description":"\u003cp\u003eThe McIntosh MA12000 is the most powerful integrated amplifier McIntosh builds, a hybrid design delivering 350 watts per channel into 2, 4 or 8 ohms. The constant power across all three impedances comes from McIntosh Autoformer outputs, which match the amplifier to the loudspeaker rather than letting power fall away as the load changes. Four 12AX7A vacuum tubes, two per channel, form the preamplifier stage ahead of a solid-state power amplifier, an arrangement McIntosh calls Hybrid Drive.\u003c\/p\u003e\n\n\u003cp\u003eSeventeen inputs cover almost any source: two balanced and six unbalanced analogue, separate moving coil and moving magnet phono inputs with adjustable loading, two coaxial, two optical, USB, an MCT input for McIntosh SACD transports, and HDMI ARC for television audio. The factory-installed DA2 digital module is upgradeable, and handles PCM to 32-bit\/384 kHz, DSD to DSD512 and DXD to 384 kHz. An 8-band analogue tone control, a high-drive headphone amplifier with HXD crossfeed, Power Guard, Sentry Monitor and the two McIntosh Blue watt meters complete the specification.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#0F527F;\"\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e350 watts per channel into 2, 4 or 8 ohms\u003c\/li\u003e\n\u003cli\u003eMcIntosh Autoformer outputs for constant power across impedances\u003c\/li\u003e\n\u003cli\u003eHybrid Drive tube preamplifier with solid-state output stage\u003c\/li\u003e\n\u003cli\u003eFour 12AX7A vacuum tubes, two per channel\u003c\/li\u003e\n\u003cli\u003eSeparate MM and MC phono inputs with adjustable loading\u003c\/li\u003e\n\u003cli\u003eUpgradeable DA2 digital module with 32-bit\/384 kHz DAC\u003c\/li\u003e\n\u003cli\u003eUSB supporting DSD512 and DXD 384 kHz\u003c\/li\u003e\n\u003cli\u003eHDMI ARC input for television audio\u003c\/li\u003e\n\u003cli\u003eMCT input for McIntosh SACD and CD transports\u003c\/li\u003e\n\u003cli\u003eDiscrete 8-band analogue tone control with bypass\u003c\/li\u003e\n\u003cli\u003ePower Guard and Sentry Monitor protection\u003c\/li\u003e\n\u003cli\u003eTwo peak-responding McIntosh Blue watt meters\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color:#0F527F;\"\u003eWarranty\u003c\/h3\u003e\n\u003cp\u003eThis product comes with a 3-year manufacturer warranty.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#0F527F;\"\u003eWhy Consider the McIntosh MA12000\u003c\/h3\u003e\n\u003cp\u003eThe Autoformer output is what sets the MA12000 apart from every conventional amplifier at this level. Because the full 350 watts is available into 2, 4 and 8 ohms alike, loudspeaker choice is no longer constrained by impedance, and difficult low-impedance loads that make other amplifiers struggle are simply a normal operating condition here. The input count is the second argument: with two phono stages, HDMI ARC, USB and an MCT connection, this single chassis replaces a preamplifier, a DAC, two phono stages and a headphone amplifier without compromise on any of them.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIdeal For\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eReference systems with demanding or low-impedance loudspeakers\u003c\/li\u003e\n\u003cli\u003eVinyl collections using both moving magnet and moving coil cartridges\u003c\/li\u003e\n\u003cli\u003eLarge rooms where power reserves matter\u003c\/li\u003e\n\u003cli\u003eListeners consolidating several high-end separates into one chassis\u003c\/li\u003e\n\u003cli\u003eHigh-resolution digital libraries including DSD and DXD\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color:#0F527F;\"\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMcIntosh MA12000 Integrated Amplifier\u003c\/li\u003e\n\u003cli\u003eVacuum tubes fitted\u003c\/li\u003e\n\u003cli\u003eHR085 remote control\u003c\/li\u003e\n\u003cli\u003ePower cable\u003c\/li\u003e\n\u003cli\u003eOwner's manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color:#0F527F;\"\u003eDownloads\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.mcintoshlabs.com\/-\/media\/Files\/mcintoshlabs\/DocumentMaster\/us\/ma12000-om-24110101.pdf\" target=\"_blank\" rel=\"nofollow noopener\"\u003eOwner's Manual (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.mcintoshlabs.com\/-\/media\/Files\/mcintoshlabs\/DocumentMaster\/us\/MA12000-brochure-35110800.pdf\" target=\"_blank\" rel=\"nofollow noopener\"\u003eProduct Brochure (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.mcintoshlabs.com\/-\/media\/Files\/mcintoshlabs\/DocumentMaster\/us\/MA12000-cd1and2-01.pdf\" target=\"_blank\" rel=\"nofollow noopener\"\u003eConnection Diagrams (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color:#0F527F;\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv class=\"ph-spec-wrap\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr class=\"ph-sec-hd\"\u003e\u003ctd colspan=\"2\"\u003eAmplifier Performance\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Power Output\"\u003ePower Output, 2, 4 and 8 ohms\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e350 W per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Rated Power Band\"\u003eRated Power Band\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e20 Hz - 20 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Dynamic Headroom\"\u003eDynamic Headroom\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e1.5 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"THD (Amp)\"\u003eTotal Harmonic Distortion, Amplifier\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e0.005%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"THD (Preamp)\"\u003eTotal Harmonic Distortion, Preamplifier\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e0.03%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Frequency Response\"\u003eFrequency Response\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e20 Hz - 20 kHz (+0, -0.5 dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Frequency Response (Extended)\"\u003eFrequency Response, Extended\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e10 Hz - 100 kHz (+0, -3 dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Damping Factor\"\u003eDamping Factor\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003eGreater than 40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Output Type\"\u003eOutput Type\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003eMcIntosh Autoformer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Max Output (Balanced)\"\u003eMaximum Output, Balanced\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e16 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Max Output (Unbalanced)\"\u003eMaximum Output, Unbalanced\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e8 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr class=\"ph-sec-hd\"\u003e\u003ctd colspan=\"2\"\u003eTube Complement\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Preamp Tubes\"\u003ePreamplifier Tubes\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e4 x 12AX7A, 2 per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Output Stage\"\u003eOutput Stage\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003eSolid state\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr class=\"ph-sec-hd\"\u003e\u003ctd colspan=\"2\"\u003eSignal to Noise and Sensitivity\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"S\/N (High Level)\"\u003eS\/N Ratio, High Level\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e95 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"S\/N (Phono MM)\"\u003eS\/N Ratio, Phono MM\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e77 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"S\/N (Phono MC)\"\u003eS\/N Ratio, Phono MC\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e75 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"S\/N (Power Amp)\"\u003eS\/N Ratio, Power Amp Input\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e114 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Sensitivity (Balanced)\"\u003eInput Sensitivity, Balanced\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e600 mV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Sensitivity (Unbalanced)\"\u003eInput Sensitivity, Unbalanced\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e300 mV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Sensitivity (Phono MM)\"\u003eInput Sensitivity, Phono MM\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e3.0 mV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Sensitivity (Phono MC)\"\u003eInput Sensitivity, Phono MC\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e0.30 mV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Sensitivity (Power Amp)\"\u003eInput Sensitivity, Power Amp\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e1.7 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Input Impedance\"\u003eInput Impedance\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e44 kilohms balanced, 22 kilohms unbalanced\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr class=\"ph-sec-hd\"\u003e\u003ctd colspan=\"2\"\u003eAnalogue Inputs and Outputs\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Balanced Inputs\"\u003eBalanced Inputs\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e2 XLR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Unbalanced Inputs\"\u003eUnbalanced Inputs\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e6, gold-plated solid brass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Phono MM\"\u003eMoving Magnet Phono Input\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e1, adjustable loading\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Phono MC\"\u003eMoving Coil Phono Input\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e1, adjustable loading\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Variable Outputs\"\u003eVariable Outputs\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e1 balanced, 1 unbalanced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Fixed Output\"\u003eFixed Output\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e1 unbalanced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Headphone Output\"\u003eHeadphone Output\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e1\/4 inch, High Drive with HXD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Binding Posts\"\u003eSpeaker Binding Posts\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003eSolid Cinch, gold-plated\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr class=\"ph-sec-hd\"\u003e\u003ctd colspan=\"2\"\u003eDigital Inputs and Conversion\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Digital Module\"\u003eDigital Module\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003eDA2, factory installed and upgradeable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"DAC\"\u003eDigital to Analogue Converter\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e8-channel, 32-bit\/384 kHz PCM and DSD, quad balanced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Coaxial\"\u003eCoaxial Inputs\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e2, 24-bit\/44.1 kHz to 192 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Optical\"\u003eOptical Inputs\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e2, 24-bit\/44.1 kHz to 192 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"USB\"\u003eUSB Input\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e1, PCM 32-bit up to 384 kHz, DSD64 to DSD512, DXD 352.8 and 384 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"MCT\"\u003eMCT Input\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e1, 16-bit\/44.1 kHz CD or DSD64 SACD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"HDMI\"\u003eHDMI Input\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e1 ARC, audio only, multichannel converted to 2-channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Roon\"\u003eRoon\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003eRoon Tested\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr class=\"ph-sec-hd\"\u003e\u003ctd colspan=\"2\"\u003eControl and Protection\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Tone Controls\"\u003eTone Controls\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003eDiscrete 8-band analogue with bypass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Input Assign\"\u003eInput Assign and Level Match\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Home Theater PassThru\"\u003eHome Theater PassThru\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Power Guard\"\u003ePower Guard\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Sentry Monitor\"\u003eSentry Monitor\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003eYes, fuseless with automatic reset\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Meters\"\u003eOutput Meters\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e2 peak-responding McIntosh Blue watt meters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"RS232\"\u003eRS232 Control Input\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Power Control\"\u003ePower Control\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e1 main output, 2 trigger outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Data Ports\"\u003eRear Panel Data Ports\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"IR Inputs\"\u003eRear Panel IR Sensor Inputs\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr class=\"ph-sec-hd\"\u003e\u003ctd colspan=\"2\"\u003eGeneral\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Type\"\u003eType\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003eHybrid, vacuum tube preamplifier with solid-state output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Finish\"\u003eFinish\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003ePolished stainless steel and black painted steel, black glass front panel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Dimensions\"\u003eDimensions (W x H x D)\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e445 x 240 x 502 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Standby Consumption\"\u003eStandby Power Consumption\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003eLess than 0.25 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Net Weight\"\u003eNet Weight\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e48.9 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Shipping Weight\"\u003eShipping Weight\u003c\/td\u003e\n\u003ctd data-label=\"Value\"\u003e63.9 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003cstyle\u003e\n.ph-spec-wrap table{width:100%;border-collapse:collapse;font-size:15px;}\n.ph-spec-wrap td{padding:10px 12px;border-bottom:1px solid #e5e5e5;vertical-align:top;}\n.ph-spec-wrap td:first-child{width:42%;font-weight:600;color:#333;}\n.ph-spec-wrap tr.ph-sec-hd 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