{"product_id":"mcintosh-mc275b","title":"MC275 2-Channel Power Amplifier","description":"\u003cdiv class=\"mc-editorial\"\u003e\n\u003cfigure class=\"mc-img-block\"\u003e\u003cimg src=\"https:\/\/www.mcintoshlabs.com\/-\/media\/Images\/mcintoshlabs\/Products\/ProductImages\/Shared\/2022RecComp.png?rev=4bd27f5f3f2f4f1db99ec9aa68bf8803\" alt=\"Stereophile 2022 Recommended Component logo\" loading=\"lazy\"\u003e\u003c\/figure\u003e\n\u003csection id=\"overview\" class=\"mc-section\"\u003e\u003cp\u003eUpon its initial release in 1961, the MC275 Vacuum Tube Amplifier became an instant favorite due to its ability to drive the power-hungry speakers of that time period with great power at low distortion levels. However, as transistors emerged and vacuum tubes became 'old technology,' the MC275 was discontinued in 1971. Thankfully, that is not where the story of the MC275 ends.\u003c\/p\u003e\u003c\/section\u003e\n\u003csection id=\"section-1\" class=\"mc-section\"\u003e\u003cp\u003e\"Good audio engineering is timeless.\" - Stereophile\u003c\/p\u003e\u003c\/section\u003e\n\u003cfigure class=\"mc-img-block\"\u003e\u003cimg src=\"https:\/\/www.mcintoshlabs.com\/-\/media\/images\/mcintoshlabs\/products\/productimages\/mc275b\/mc275b-0981_r2_qc_adobe_rgb.jpg?rev=f8903bdbe8ab439ebad76f7e88d91e4b\u0026amp;revision=f8903bdb-e8ab-439e-bad7-6f7e88d91e4b\" alt=\"McIntosh MC275 Amplifier\" loading=\"lazy\"\u003e\u003c\/figure\u003e\n\u003csection id=\"section-2\" class=\"mc-section\"\u003e\u003cp\u003eIt came back into production as a special commemoration edition in 1993 to posthumously honor McIntosh co-founder and longtime president Gordon Gow. The reincarnated MC275 received incredibly high acclaim and earned its spot back in the product lineup. The overall storyline behind the MC275 and its history with McIntosh is exceptionally rich and it has been the driving force behind countless home audio systems for decades. It is hard to imagine McIntosh without the MC275.\u003c\/p\u003e\u003c\/section\u003e\n\u003cfigure class=\"mc-img-block\"\u003e\u003cimg src=\"https:\/\/www.mcintoshlabs.com\/-\/media\/images\/mcintoshlabs\/products\/productimages\/mc275b\/mc275b-1006_qc_adobe_rgb.jpg?rev=0b79c4d4fd5e44df82e3f66cf06a3c98\u0026amp;revision=0b79c4d4-fd5e-44df-82e3-f66cf06a3c98\" alt=\"McIntosh MC275 Amplifier\" loading=\"lazy\"\u003e\u003c\/figure\u003e\n\u003csection id=\"section-3\" class=\"mc-section\"\u003e\u003cp\u003eNow in its sixth generation, the MC275 has many subtle enhancements from the previous releases that have greatly improved performance. Combined with the widest bandwidth McIntosh output transformer design, the MC275 features tauter bass control and thermally quiet circuit design. The result is pure music. This vacuum tube power amplifier has all the features to meet the needs of today’s music enthusiast, while preserving the qualities that have made the MC275 the most revered McIntosh vacuum tube amplifier.\u003c\/p\u003e\u003c\/section\u003e\n\u003cfigure class=\"mc-img-block\"\u003e\u003cimg src=\"https:\/\/www.mcintoshlabs.com\/-\/media\/images\/mcintoshlabs\/products\/productimages\/mc275b\/mc275b-1045_b_qc_adobe_rgb.jpg?rev=9d5c0c99e0a6468aa9873ae24fc80e48\u0026amp;revision=9d5c0c99-e0a6-468a-a987-3ae24fc80e48\" alt=\"McIntosh MC275 Amplifier\" loading=\"lazy\"\u003e\u003c\/figure\u003e\n\u003csection id=\"section-4\" class=\"mc-section\"\u003e\u003cp\u003eThe MC275 can be used in either stereo or mono mode. When used as a stereo amplifier, it will deliver 75 Watts per channel to 4, 8 or 16 Ohm speakers; in mono mode it will output 150 Watts to a single speakerwith an impedance of 2, 4 or 8 Ohms. The MC275's full power can be delivered regardless of the speaker impedance thanks to our patented Unity Coupled Circuit output transformer technology – the same technology McIntosh was founded on in 1949. The two Unity Coupled Circuit output transformers are located next to the power transformer.\u003c\/p\u003e\u003c\/section\u003e\n\u003cfigure class=\"mc-img-block\"\u003e\u003cimg src=\"https:\/\/www.mcintoshlabs.com\/-\/media\/images\/mcintoshlabs\/products\/productimages\/mc275b\/mc275b-1049_qc_adobe_rgb.jpg?rev=37cf94b5d6bf475a8523406c764dd576\u0026amp;revision=37cf94b5-d6bf-475a-8523-406c764dd576\" alt=\"McIntosh MC275 Amplifier\" loading=\"lazy\"\u003e\u003c\/figure\u003e\n\u003csection id=\"section-5\" class=\"mc-section\"\u003e\u003cp\u003eFour KT88 vacuum tubes power the output section while four 12AT7 and three 12AX7A smaller vacuum tubes are used for the Input, Voltage, and Driver amps. The MC275 offers both balanced and unbalanced inputs to connect to your preamplifier and home audio system. It comes with our fuse-less Sentry Monitor™ short-circuit protection that disengages the output stage before current exceeds safe operating levels and then resets automatically when operating conditions return to normal. Our patented gold-plated Solid Cinch™ speaker binding posts assure the best connection to all speaker cables.\u003c\/p\u003e\u003c\/section\u003e\n\u003cfigure class=\"mc-video-block\"\u003e\u003cvideo autoplay loop muted playsinline poster=\"https:\/\/www.mcintoshlabs.com\/-\/media\/videos\/mcintoshlabs\/short---solid-cinch-binding-posts-thumbnail.jpg?rev=1f4e39e1994b498ab3159ac6bf37e94e\u0026amp;revision=1f4e39e1-994b-498a-b315-9ac6bf37e94e\"\u003e\u003csource src=\"https:\/\/www.mcintoshlabs.com\/-\/media\/Videos\/McIntoshLabs\/Short---Solid-Cinch-binding-posts-1280a.mp4?rev=8d5ed2f72f4440f68caab51425a8e46e\u0026amp;revision=8d5ed2f7-2f44-40f6-8caa-b51425a8e46e\" type=\"video\/mp4\"\u003e\u003c\/video\u003e\u003c\/figure\u003e\n\u003csection id=\"section-6\" class=\"mc-section\"\u003e\u003cp\u003eThe seven small tubes are LED illuminated to indicate the amplifiers functional status: upon power up, they sequentially glow amber for a few seconds and then all turn green to signify system readiness. In the rare case of an output tube failure, the small tube(s) in front of it will turn red to notify you of the problem. An input and output for our Power Control technology allows other connected McIntosh components, such as preamplifiers, CD players, turntables, or media steamers, to automatically turn on and off. Contact your local dealer to learn more.\u003c\/p\u003e\u003c\/section\u003e\n\u003cdetails id=\"specifications\" class=\"mc-accordion\"\u003e\u003csummary\u003eSpecifications\u003c\/summary\u003e\u003cdiv class=\"mc-spec-body\"\u003e\n\u003cp class=\"mc-spec-heading\"\u003eElectronic Specifications\u003c\/p\u003e\n\u003cdiv class=\"mc-spec-grid\"\u003e\n\u003cdiv class=\"mc-spec-item\"\u003e\n\u003cp class=\"mc-spec-name\"\u003eFTC Power Output Rating\u003c\/p\u003e\n\u003cp class=\"mc-spec-value\"\u003e75 W\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mc-spec-item\"\u003e\n\u003cp class=\"mc-spec-name\"\u003ePower Output per Channel\u003c\/p\u003e\n\u003cp class=\"mc-spec-value\"\u003e75 W into 4, 8 or 16 ohms\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mc-spec-item\"\u003e\n\u003cp class=\"mc-spec-name\"\u003eNumber of Channels\u003c\/p\u003e\n\u003cp class=\"mc-spec-value\"\u003e2\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mc-spec-item\"\u003e\n\u003cp class=\"mc-spec-name\"\u003eTotal Harmonic Distortion\u003c\/p\u003e\n\u003cp class=\"mc-spec-value\"\u003e0.5% maximum harmonic distortion at any power level from 250 milliwatts to rated power, 20Hz to 20kHz\u003c\/p\u003e\n\u003cp class=\"mc-spec-sub\"\u003e(≤ 0.25% harmonic distortion at 1kHz)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mc-spec-item\"\u003e\n\u003cp class=\"mc-spec-name\"\u003eS\/N below rated output\u003c\/p\u003e\n\u003cp class=\"mc-spec-value\"\u003e105dB\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mc-spec-item\"\u003e\n\u003cp class=\"mc-spec-name\"\u003eDynamic Headroom\u003c\/p\u003e\n\u003cp class=\"mc-spec-value\"\u003e1.2dB\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mc-spec-item\"\u003e\n\u003cp class=\"mc-spec-name\"\u003eDamping Factor\u003c\/p\u003e\n\u003cp class=\"mc-spec-value\"\u003e\u0026gt;22\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mc-spec-item\"\u003e\n\u003cp class=\"mc-spec-name\"\u003eRated Power Band\u003c\/p\u003e\n\u003cp class=\"mc-spec-value\"\u003e20Hz to 20kHz\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mc-spec-item\"\u003e\n\u003cp class=\"mc-spec-name\"\u003eFrequency Response\u003c\/p\u003e\n\u003cp class=\"mc-spec-value\"\u003e+0, -0.5dB from 20Hz to 20kHz\u003c\/p\u003e\n\u003cp class=\"mc-spec-sub\"\u003e+0, -3.0dB from 10Hz to 100kHz\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"mc-spec-heading\"\u003eControl\u003c\/p\u003e\n\u003cdiv class=\"mc-spec-grid\"\u003e\n\u003cdiv class=\"mc-spec-item\"\u003e\n\u003cp class=\"mc-spec-name\"\u003eRemote Power Control\u003c\/p\u003e\n\u003cp class=\"mc-spec-value\"\u003eYes, input and output\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mc-spec-item\"\u003e\n\u003cp class=\"mc-spec-name\"\u003eMulti-Channel DB25 Cable\u003c\/p\u003e\n\u003cp class=\"mc-spec-value\"\u003eN\/A\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"mc-spec-heading\"\u003eGeneral Specifications\u003c\/p\u003e\n\u003cdiv class=\"mc-spec-grid\"\u003e\n\u003cdiv class=\"mc-spec-item\"\u003e\n\u003cp class=\"mc-spec-name\"\u003eCircuit Configuration\u003c\/p\u003e\n\u003cp class=\"mc-spec-value\"\u003eUnity Coupled\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mc-spec-item\"\u003e\n\u003cp class=\"mc-spec-name\"\u003eCircuit Design\u003c\/p\u003e\n\u003cp class=\"mc-spec-value\"\u003eVacuum Tube\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mc-spec-item\"\u003e\n\u003cp class=\"mc-spec-name\"\u003eMono Bridge\u003c\/p\u003e\n\u003cp class=\"mc-spec-value\"\u003eYes\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mc-spec-item\"\u003e\n\u003cp class=\"mc-spec-name\"\u003eMono Parallel\u003c\/p\u003e\n\u003cp class=\"mc-spec-value\"\u003eYes, 150W @ 2, 4 or 8 Ohms\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mc-spec-item\"\u003e\n\u003cp class=\"mc-spec-name\"\u003eOutput Type\u003c\/p\u003e\n\u003cp class=\"mc-spec-value\"\u003eUnity Coupled Output Transformer\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mc-spec-item\"\u003e\n\u003cp class=\"mc-spec-name\"\u003eMeters\u003c\/p\u003e\n\u003cp class=\"mc-spec-value\"\u003eNo\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mc-spec-item\"\u003e\n\u003cp class=\"mc-spec-name\"\u003eMeter Light Switch\u003c\/p\u003e\n\u003cp class=\"mc-spec-value\"\u003eSmall signal tubes LEDs controlled by McIntosh preamp\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mc-spec-item\"\u003e\n\u003cp class=\"mc-spec-name\"\u003eBalanced Input\u003c\/p\u003e\n\u003cp class=\"mc-spec-value\"\u003eYes\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mc-spec-item\"\u003e\n\u003cp class=\"mc-spec-name\"\u003eFront Panel\u003c\/p\u003e\n\u003cp class=\"mc-spec-value\"\u003eN\/A\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mc-spec-item\"\u003e\n\u003cp class=\"mc-spec-name\"\u003eIllumination\u003c\/p\u003e\n\u003cp class=\"mc-spec-value\"\u003eSmall Signal Tubes, LED\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mc-spec-item\"\u003e\n\u003cp class=\"mc-spec-name\"\u003eChassis Style\u003c\/p\u003e\n\u003cp class=\"mc-spec-value\"\u003ePolished Stainless Steel\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"mc-spec-heading\"\u003eConnectivity\u003c\/p\u003e\n\u003cdiv class=\"mc-spec-grid\"\u003e\u003cdiv class=\"mc-spec-item\"\u003e\n\u003cp class=\"mc-spec-name\"\u003eSpeaker Binding Post Type\u003c\/p\u003e\n\u003cp class=\"mc-spec-value\"\u003ePatented Solid Cinch™ Speaker Binding Posts\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003cp class=\"mc-spec-heading\"\u003eWeights \u0026amp; Dimensions\u003c\/p\u003e\n\u003cdiv class=\"mc-spec-grid\"\u003e\n\u003cdiv class=\"mc-spec-item\"\u003e\n\u003cp class=\"mc-spec-name\"\u003eUnit Dimensions (W x H x D)\u003c\/p\u003e\n\u003cp class=\"mc-spec-value\"\u003e16-1\/2\" (41.9cm) x 8-1\/2\" (21.6cm) x 12\" (30.5cm)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mc-spec-item\"\u003e\n\u003cp class=\"mc-spec-name\"\u003eUnit Weight\u003c\/p\u003e\n\u003cp class=\"mc-spec-value\"\u003e67 lbs (30.5 kg)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mc-spec-item\"\u003e\n\u003cp class=\"mc-spec-name\"\u003eShipping Weight\u003c\/p\u003e\n\u003cp class=\"mc-spec-value\"\u003e75 lbs (34.1 kg)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails id=\"downloads\" class=\"mc-accordion\"\u003e\u003csummary\u003eDownloads\u003c\/summary\u003e\u003cul class=\"mc-downloads\"\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.mcintoshlabs.com\/-\/media\/Files\/mcintoshlabs\/DocumentMaster\/us\/MC275B-brochure-35015800.pdf?rev=8a51a1b6b92643c583c907a73adeb6f4\u0026amp;revision=8a51a1b6-b926-43c5-83c9-07a73adeb6f4\"\u003eMC275 Power Amplifier Brochure\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.mcintoshlabs.com\/-\/media\/Files\/mcintoshlabs\/DocumentMaster\/us\/mc275bom01.pdf?rev=0c6db59bb1b141baac73dadb6b9c76b0\u0026amp;revision=0c6db59b-b1b1-41ba-ac73-dadb6b9c76b0\"\u003eMC275 Power Amplifier Owner's Manual\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.mcintoshlabs.com\/-\/media\/Files\/mcintoshlabs\/DocumentMaster\/us\/mc275bcd1and2-01.pdf?rev=8149da678acd4e32bb08be81b8c8c89e\u0026amp;revision=8149da67-8acd-4e32-bb08-be81b8c8c89e\"\u003eMC275 Power Amplifier Connection Diagram\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.mcintoshlabs.com\/-\/media\/Files\/mcintoshlabs\/DocumentMaster\/us\/safety-01.pdf?rev=c0c4572819634d80beab83072e4218df\u0026amp;revision=c0c45728-1963-4d80-beab-83072e4218df\"\u003eImportant Additional Operation Information Guide - Lithium Batteries\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n.mc-editorial{font-family:inherit;color:inherit;line-height:inherit}\n.mc-section{padding:2.5rem 0;border-top:1px solid rgba(128,128,128,.2)}\n.mc-section:first-child{border-top:none;padding-top:0}\n.mc-section h3{margin:0 0 .75rem;font-size:inherit}\n.mc-section p{margin:0 0 1rem;opacity:.8}\n.mc-section p:last-child{margin-bottom:0}\n.mc-img-block,.mc-video-block{margin:0;padding:0}\n.mc-img-block img,.mc-video-block video{width:100%;height:auto;display:block}\n.mc-video-block video{max-height:600px;object-fit:cover}\n.mc-accordion{border-top:1px solid rgba(128,128,128,.2);margin:0}\n.mc-accordion summary{cursor:pointer;padding:1.25rem 0;list-style:none;display:flex;justify-content:space-between;align-items:center;font-weight:600;font-family:inherit;color:inherit}\n.mc-accordion summary::-webkit-details-marker{display:none}\n.mc-accordion summary::after{content:'+';font-size:1.5rem;font-weight:300;line-height:1}\n.mc-accordion[open] summary::after{content:'−'}\n.mc-spec-body{padding-bottom:1.5rem}\n.mc-spec-heading{font-size:.7em;font-weight:700;text-transform:uppercase;letter-spacing:.08em;opacity:.5;padding:.75rem 0 .25rem;margin:0}\n.mc-spec-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:0 2rem;margin:0 0 .5rem}\n.mc-spec-item{padding:.5rem 0;border-bottom:1px solid rgba(128,128,128,.15)}\n.mc-spec-name{margin:0 0 .2rem;font-size:.875em;font-weight:600;opacity:.9}\n.mc-spec-value,.mc-spec-sub{margin:0;font-size:.875em}\n.mc-spec-value{opacity:.8}\n.mc-spec-sub{opacity:.6}\n.mc-downloads{list-style:none;padding:0;margin:0 0 1.5rem}\n.mc-downloads li{padding:.5rem 0;border-bottom:1px solid rgba(128,128,128,.15)}\n.mc-downloads a{color:inherit;text-underline-offset:3px}\n@media(max-width:600px){.mc-spec-grid{grid-template-columns:1fr}}\n\u003c\/style\u003e","brand":"McIntosh","offers":[{"title":"Default Title","offer_id":54166342041937,"sku":"MC275B","price":7500.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1047\/7178\/0945\/files\/mc275b-angle_53e22c2d-9d63-4d5c-afbf-7708e1b5d419.jpg?v=1782728447","url":"https:\/\/gridhifi.com\/products\/mcintosh-mc275b","provider":"The Grid","version":"1.0","type":"link"}