{"product_id":"mcintosh-mc462-2-channel-vacuum-tube-power-amplifier","title":"McIntosh MC275 2-Channel Vacuum Tube Power Amplifier","description":"\u003ch1\u003eMcIntosh MC275 2-Channel Vacuum Tube Power Amplifier\u003c\/h1\u003e\n\u003ch3\u003e75 Wpc stereo tube amplifier with Unity Coupled output transformers and 150 W monoblock operation\u003c\/h3\u003e\n\u003cp\u003eThe McIntosh MC275 is one of the company’s longest-running and most recognizable vacuum tube power amplifiers. Originally introduced in 1961, the current sixth-generation version preserves the basic architecture and exposed-tube layout of the original while incorporating modern protection, connectivity, and component refinements.\u003c\/p\u003e\n\u003cp\u003eIn stereo operation, the MC275 delivers 75 Wpc into 4-, 8-, or 16-ohm loudspeakers. Its two channels can also be combined for 150 W monoblock operation into 2-, 4-, or 8-ohm loads. McIntosh’s Unity Coupled Circuit output transformers allow the amplifier to deliver full rated power across those supported impedances rather than limiting maximum output to a single nominal load.\u003c\/p\u003e\n\u003cp\u003eFour KT88 output tubes provide the power, while four 12AT7 and three 12AX7A tubes handle the input, voltage-amplification, phase-inverter, and driver stages. The small-signal tubes are LED illuminated to indicate operating status: they glow amber during startup, turn green when the amplifier is ready, and can indicate an output-tube fault by turning red.\u003c\/p\u003e\n\u003cp\u003eBalanced and unbalanced inputs provide compatibility with a wide range of preamplifiers, while Sentry Monitor protects the output stage against unsafe operating conditions without relying on conventional fuses. McIntosh Solid Cinch speaker binding posts, Power Control input and output, and a polished stainless-steel chassis complete an amplifier that remains closely tied to the company’s classic tube designs.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\n\u003ch4\u003e75 Wpc Stereo Operation\u003c\/h4\u003e\n\u003cp\u003eThe MC275 delivers 75 Wpc into 4-, 8-, or 16-ohm loudspeakers, with both channels operating across the full 20 Hz–20 kHz rated power band.\u003c\/p\u003e\n\n\u003ch4\u003e150 W Monoblock Operation\u003c\/h4\u003e\n\u003cp\u003eThe two channels can be combined for 150 W mono operation into 2-, 4-, or 8-ohm loudspeaker loads when additional output is required.\u003c\/p\u003e\n\n\u003ch4\u003eUnity Coupled Circuit\u003c\/h4\u003e\n\u003cp\u003eMcIntosh’s Unity Coupled Circuit output transformer technology allows the MC275 to deliver its full rated output into multiple loudspeaker impedances while maintaining low distortion and wide bandwidth.\u003c\/p\u003e\n\n\u003ch4\u003eAll-Tube Signal Path\u003c\/h4\u003e\n\u003cp\u003eFour KT88 output tubes are joined by four 12AT7 and three 12AX7A small-signal tubes for an entirely vacuum tube amplification circuit.\u003c\/p\u003e\n\n\u003ch4\u003eTube Status Illumination\u003c\/h4\u003e\n\u003cp\u003eThe seven small-signal tubes are LED illuminated to show amplifier status. Amber illumination indicates startup, green indicates normal operation, and red can identify a fault associated with an output tube.\u003c\/p\u003e\n\n\u003ch4\u003eSentry Monitor\u003c\/h4\u003e\n\u003cp\u003eSentry Monitor provides fuse-less protection for the output stage, shutting the amplifier down if operating conditions become unsafe and automatically restoring operation when conditions return to normal.\u003c\/p\u003e\n\n\u003ch4\u003eBalanced and Unbalanced Inputs\u003c\/h4\u003e\n\u003cp\u003eBoth balanced and unbalanced inputs are provided, allowing the MC275 to integrate easily with a wide variety of contemporary and vintage preamplifiers.\u003c\/p\u003e\n\n\u003ch4\u003eSolid Cinch Speaker Binding Posts\u003c\/h4\u003e\n\u003cp\u003eMcIntosh Solid Cinch speaker binding posts provide secure, gold-plated connections for speaker cables and support the amplifier’s dedicated output impedance taps.\u003c\/p\u003e\n\n\u003ch4\u003ePower Control\u003c\/h4\u003e\n\u003cp\u003ePower Control input and output connections allow the MC275 to power on and off in coordination with compatible McIntosh components.\u003c\/p\u003e\n\n\u003ch3\u003eWhat’s Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMcIntosh MC275 2-Channel Vacuum Tube Power Amplifier\u003c\/li\u003e\n\u003cli\u003eTube protection cage\u003c\/li\u003e\n\u003cli\u003eAC power cord\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eType:\u003c\/b\u003e Vacuum tube stereo power amplifier\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eChannels:\u003c\/b\u003e 2\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003ePower Output:\u003c\/b\u003e 75 Wpc into 4, 8, or 16 ohms; 150 W mono into 2, 4, or 8 ohms\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eRated Power Band:\u003c\/b\u003e 20 Hz–20 kHz\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\u003eTotal Harmonic Distortion:\u003c\/b\u003e 0.5% maximum, 250 mW to rated power, 20 Hz–20 kHz\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eIntermodulation Distortion:\u003c\/b\u003e 0.5% maximum\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eSignal-to-Noise Ratio:\u003c\/b\u003e 105 dB below rated output, A-weighted\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eDynamic Headroom:\u003c\/b\u003e 1.2 dB\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eDamping Factor:\u003c\/b\u003e Greater than 22\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eInput Sensitivity:\u003c\/b\u003e 3.4 V balanced; 1.7 V unbalanced\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eInput Impedance:\u003c\/b\u003e 20 kΩ balanced; 47 kΩ unbalanced\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eVacuum Tubes:\u003c\/b\u003e 4 × KT88\/6550, 4 × 12AT7, 3 × 12AX7A\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eCircuit Configuration:\u003c\/b\u003e Unity Coupled\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eOutput Type:\u003c\/b\u003e Unity Coupled output transformer\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eBalanced Inputs:\u003c\/b\u003e 1 stereo pair\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eUnbalanced Inputs:\u003c\/b\u003e 1 stereo pair\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eMono Operation:\u003c\/b\u003e Parallel, 150 W into 2, 4, or 8 ohms\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eRemote Power Control:\u003c\/b\u003e Input and output\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eOutput Meters:\u003c\/b\u003e No\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eSpeaker Connections:\u003c\/b\u003e Solid Cinch speaker binding posts\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eIllumination:\u003c\/b\u003e LED-illuminated small-signal tubes\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eChassis:\u003c\/b\u003e Polished stainless steel\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eStandby Power Consumption:\u003c\/b\u003e Less than 0.3 W\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eDimensions (H × W × D):\u003c\/b\u003e 8-1\/2\" × 16-1\/2\" × 12\" (21.6 × 41.9 × 30.5 cm)\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eWeight:\u003c\/b\u003e 67 lb. (30.5 kg)\u003c\/p\u003e","brand":"McIntosh Labs","offers":[{"title":"Default Title","offer_id":54132212695224,"sku":"MC275","price":7500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1564\/1247\/files\/MC275B_Front_Topcopy.jpg?v=1791303926","url":"https:\/\/upscaleaudio.pro\/products\/mcintosh-mc462-2-channel-vacuum-tube-power-amplifier","provider":"Upscale Audio","version":"1.0","type":"link"}