If the mc275 is connected to a mcintosh preamplifier, control center or a v center, the addition of a mcintosh power controller such as a pc4 will allow the mc275 to switch on and off automatically. I used to own an mc275 mk v but i did not have access to an schematic, therefore i chose to be conservative and not mix and match tube. Introduced in 1961 as the powerhouse of that eras newfangled stereo tube amps two 75w amplifiers in one chassis. A few years ago when i bought my mc275 mark 6, i went looking for info on this site and others about how to optimize it via tube rolling or other. Mcintosh mc275 manual stereo power amplifier hifi engine. The only reason i could see for going with a vintage mc275 other than price would be a desire for pointtopoint wiring the modern versions use a circuit board.
I am the original owner and the amplifier is about 18 months old. This is a part of a protection circuit system which will also shut the amp down if. Refer to the right side panel of the mc275 for the correct voltage. Discussion in archived classifieds started by bdesai666, feb 23, 2016. Scroll down for product registration and other helpful links.
This sixth generation mc275 has many subtle enhancements from the previous release that greatly improve performance. Jan 11, 2012 mcintosh popped out a new 50th anniversary edition of its popular mc275 tube amplifier. Gow was vice president of mcln tosh laboratory inc. Two 75 watt output channels will drive any high quality loudspeaker system to its ultimate performance. Oct 18, 2010 its been a while since ive had a classic amplifier in my system, and mcintosh laboratorys mc275 is as classic as they come. For sale rare mcintosh mc275 vi tube amplifier in mint condition original box us version. Feb 23, 2016 for sale rare mcintosh mc275 vi tube amplifier in mint condition original box us version discussion in archived classifieds started by bdesai666, feb 23, 2016.
Mcintosh mc275 versions audiokarma home audio stereo. The only reason i could see for going with a vintage mc275 other than price would be a desire for point. Mcintoshs beautiful goldplated mc275 amplifier could turn. The amplifier probably has about 1200 hours on it and has always performed flawlessly. I used this in a monoblock configuration for my dedicated two channel listening room. Mcintosh diagrams, schematics and service manuals download for free. This tube power amplifier has all the features to meet the needs of todays music enthusiast, while preserving the qualities that have made the mc275 the most revered mcintosh tube amplifier. Im right now looking at the mcintosh service manual for the mc275 model iv which i ordered from mcintosh after purchasing my amp and the schematic clearly shows there is no way for the balanced input signal to go through the v 1 tube and on to the rest of the amp, when the the input switch is in the bal position. The mk vi has completely different tube numbering than the earlier 275s. So even when operating in the balanced mode, with xlr inputs, if you want your amps left channel to work the v 2 12ax7 is the left channel gainmultiplier tube then.
But i have been looking at various kt88 push pull amplifiers, and these are the 2 biggest ones that draw the question i have. It also has a different circuit than the earlier amps. Select product category then model number to find manuals, software drivers and other support documents for current and discontinued models. These components are designed and built specifically for the mc275. This is the current version of the mc275 amplifier. Nov 06, 20 mcintosh mc240 vs mc275 sign in to follow this. Ultra low noise and distortion distortioncanceling properties of mcintoshs unitycoupled circuit and unique output transformer design yield much lower distortion and noise across. Download the mcintosh mc275mk5 manuals for free hifi.
After much research, i discovered theres a new version of the venerable mcintosh mc275, the mk iv. Combining a polished stainless steel chassis with the latest. The reissue mc275 you can buy now and for the last several years is the mk vi. Free mcintosh diagrams, schematics, service manuals. Below you will found our manuals on the mcintosh mc275 mk5. Mcintosh popped out a new 50th anniversary edition of its popular mc275 tube amplifier. Very lightly used and comes with all original tubes, boxes, manual, power cord. A highspeed protection circuit shuts down the amp in case of tube malfunction or short circuits. The current mc275mkiv, v or mkv as now referred to, offered a major improvement with a 490 v power supply vs. Mcintosh mc275 power amplifier bay bloor radio toronto.
Mcintosh mc240 vs mc275 technicalmodifications the. Mcintosh mc275 mkv amplifier mint condition for sale. Device owners manual service manual brochure catalog miscellaneous pictures device. Below you will found our manuals on the mcintosh mc275. Download the mcintosh mc275 manuals for free hifi manuals. Page 4 special components used in the mc275 are listed below. As we learned with teh now allbutextinct 100th anniversary edition denon products, the specially created amp is being offered in a very limited.
Based upon the extraordinary unity coupled circuit, the mc275 vacuum tube amplifier has lush sound that presents a powerful and detailed soundstage. This edition features the same great quality of the mc275, but also comes in an elegant goldtoned chassis. Mcintosh amplifiers for home audio and home theater. I bought a new mk iv from an agon member in canada.
Thats a downgrade imho, but ron cornelius of mcintosh says the switch resulted in a better sn ratio mcintosh loves their numbers. I think the circuit was changed a little and its no longer hardwired. This website is not affiliated with or sponsored by. Based upon the extraordinary unity coupled circuit, the mc275 vacuum tube amplifier has lush sound that pre. Both myself and original owner used nos tubes so original tubes have very low hours. Mcintosh also added more laminations in the output transformers which increased the bass performance over the original designs. Not necessarily macs best, whatever that may mean, but its greatest in the sense of an innovative producttim di. View and download mcintosh mc275 service manual online. Mcintoshs original mc275 featured as an audio milestone hfn dec 10, but. Its been a while since ive had a classic amplifier in my system, and mcintosh laboratorys mc275 is as classic as they come. The current mc275 mk iv, v or mk v as now referred to, offered a major improvement with a 490 v power supply vs. The service manual functions as a repair guide for troubleshooting and sometimes contains tips for refurbishing and modifications.
Mixed driver tube for mcintosh mc275 audiogon discussion forum. Its specd at 75wch but the mk iv actually produces 95wch. Vacuum tube power amplifier an object of desire cherished by music lovers around the world, the mc275 was designed and engineered in 1961 by mcintosh cofounder sidney corderman and the mcintosh engineering team. Combined with the widest bandwidth mcintosh output transformer design, the. Mixed driver tube for mcintosh mc275 audiogon discussion. Legendary mcintosh tube amplifier with a rugged, purist design that makes it capable of high output with virtual any load over 100 watts a side, conservatively, with a damping factor in excess of 22 while retaining the holographic imaging and spectacular design for which mcintosh tube amps are justly renowned. Hp 35007100 mc275 vacuum tube power amplifier full power delivery the mc275 series iv delivers 75 watts per channel into 4, 8, and 16 ohm speakers. They may be purchased directly from mclntosh laboratory by ordering from the service department. If the mc275 is connected to a mcintosh preamplifier, control center or a v center, the addition of a mc intosh power controller such as a pc4 will allow the mc275 to switch on and off automatically. Mcintoshs beautiful goldplated mc275 amplifier could. Mcintosh mc275 mk5 vacuum tube amplifier the latest reissue version series 5. Page 1 stereo power amplifier mc275 owners manual mcintosh laboratory, inc. Mcintosh amplifiers blend eyecatching aesthetics, power and sonic integrity in a way that has been capturing the imagination of music lovers and home theater enthusiasts for decades.
Online warranty registration is available only for products purchased and used in the united. If you look at a schematic for either the mk iv or the mk v, you will see that the v 1 and v 2 12ax7s share a 24v filament supply. Press the power switch to the off posi tion to stop amplifying the audio signal. If this is your first visit, be sure to check out the faq by clicking the link above. It included mcintoshs first patented circuit, the unity coupled circuit, still used by current products. The newest incarnation of the mcintosh mc275, the mk iv, differs a bit from the others. Page 1 maintenance manual mc275 stereo power amplifier serial no. Mcintosh laboratory is an american manufacturer of handcrafted highend audio equipment. The mcintosh sound is the sound of the music itself.
To purchase mc275 spares or accessories, please contact the company via their website or visit an authorised retailer. Unbalanced inputs rightcenter on the vertical front. Theres a dealer in phoenix who sells both mac and martinlogan, who assured me it was a match made in heaven although he said id need two which i didnt, you might with summits. The service manual functions as a repair guide for troubleshooting and. Now you can take advantage of traditional mcintosh standards of excellence in the mc275 stereo power amplifier. The mcintosh mc275 kept coming up, and i learned the latest model iv and v had undergone some major updates which i liked theyve been manufactured since 1961. Mcintosh 50th anniversary mc275 tube amplifier shop your. I am referring to the latest iteration of what is widely and justly regarded as the one of the greatest tube amplifiers ever made and the greatest from mcintosh. Beautiful mcintosh mc275 mkv amplifier with low hours. Very lightly used and comes with all original tubes, boxes, manual, power cord, tube cage, etc. How could they all be kt88 push pull amplifiers and have different power outputs. Visit us online for more information or to download service manuals today.
The owners manual is used as an reference guide, instruction manual and instruction book. Actually, a mk v is in the works the only difference is it has real binding posts. Mcintosh mc275 mk v mark 5 stereo class a tube amplifier pair with almost consecutive sns tube amplifiers. For sale rare mcintosh mc275 vi tube amplifier in mint.
Sal3416205 oistrakh v oborin p beethoven violin sonatas. Combined with the widest bandwidth mcintosh output transformer design, the mc275 features tauter bass control and thermally quiet circuit design. To start viewing messages, select the forum that you want to visit from the selection below. Brochures often advertise certain specifications, the release date and the original price. So even when operating in the balanced mode, with xlr inputs, if you want your amps left channel to work the v2 12ax7 is the left channel gainmultiplier tube then.
The mc275 reproduction is sonically transparent and absolutely accurate. Power cord receptacle and fuse are on the rear panel. Jan 15, 2009 v or any other iteration of the mc275. In addition to use as a stereo amplifier, the flexibility of the mc275 permits it to be used as a monophonic amplifier that delivers 150 watts, or as two separate 75 watt amplifiers with each channel amplifying completely separate programs, or as two amplifiers for use with an. Whether your desires run towards vacuum tubes or solid state, monoblock, stereo or multichannel configurations, mcintosh has your home audio amplifier solution. I am now using it for the low end with the mc275 driving the midhighs. Mcintosh mc275 mk5 vacuumtube amplifier tube audiogon. Not necessarily macs best, whatever that may mean, but its greatest in the sense of an innovative producttim di paravicini, a man not. I know for sure the output transformers are now bigger. Mcintosh mc275 vi power amplifier and c22 preamplifier the. The company was purchased by japanese car audio maker clarion in 1990. Comes complete with original tubes, box, manual and tube cage. I used the original tubes for about 50 hours and then started rolling tubes.
Download the mcintosh mc275mk5 manuals for free hifi manuals. Sporting a goldtoned chassis, this limited edition mc275 merges the classic 1961 tube circuit design of the original with modern niceties like a multicolored led display, a high speed. This website is not affiliated with or sponsored by mcintosh. Mcintosh mc275 vi power amplifier and c22 preamplifier. The mc275 has on one chassis two 75 watt power amplifiers. The sound was fantastic, probably the best rendition i have heard. Mcintosh mc275 mkv amplifier mint condition for sale canuck. My visit to audio classics was the high point of the vacation. An object of desire cherished by music lovers around the world, the mc275 was designed and engineered in 1961 by mcintosh cofounder sidney corderman and the mcintosh engineering team. The latest mc275 features the widest bandwidth transformers mcintosh has ever made, which contribute to the amps deeper bass and more extended highs, and also to a lower operating temperature. By the dude, november 6, 20 in technicalmodifications. Just finished listening to beethovens emperor piano concerto. If you look at a schematic for either the mk iv or the mk v, you will see that the v1 and v2 12ax7s share a 24v filament supply.250 1192 1319 1226 36 751 955 98 425 319 289 1367 824 787 816 115 626 670 915 653 1367 1422 371 1320 822 1135 345 1524 1139 603 64 68 1319 1014 1161 1225 420 1156 915 1420