I dont have a mcintosh, but love their designs and plan to pick up a few of them. Printed ci rcuit board components are outl ined on the schematics by dotted lines. Mcintosh has been always associated with high quality and beautiful styling, producing vacuumtube amplifiers since its early days, including the famed mc275 stereo amp, that was and still is a big hit among audio enthusiasts. Each channel has 14 to3 cased transistors, all of the same type. This is the amp they called the jerry garcia mac as the gratefull dead used these amps to fill a stadium with sound. Its not a bad amp some folks here swear by its stereo sisters, the mc250, and the full dress mc2505. Mcintosh mc2300 manual solid state stereo power amplifier. It doesnt matter if its tubes, transistors, or a hamster on wheel. I think that these boards are the same as many mc amps i know that the drivers q112114 a mcintosh mc2300 driver boards transistors diyaudio. Mcintosh ma6600 transistor amplifier inner magazines. Oct 08, 2003 the mc50 is first generation solid state it just looks like a tube amp. Introduced in 1961 as the powerhouse of that eras newfangled stereo tube amps two 75w amplifiers in one chassis. When i was using the mc2300 in the listening room, which had meters like.
Help me pick a preamp for mcintosh mc 2300 steve hoffman. Repair and upgrade examples mcintosh home audio for sale. Discussion in mcintosh audio started by whabamp, nov 28, 2014. This is the first installment of the mcintosh mc30 rebuild.
Subject to the terms and conditions stated below, mcintosh laboratory, inc. The idea here is to do the same thing to a pair of mcintosh mc30 monoblocks as i did to the a pair of heathkit w5ms if you recall i took a pair of rusty heathkits and rebuilt them to better than new specifications using nothing but the best parts. Gate driver transistors are designed to minimize switching losses with emitterfollower configuration and optimized pinout. The mc50 is first generation solid state it just looks like a tube amp.
View and download mcintosh mc2300 service manual online. To purchase mc2300 spares or accessories, please contact the company via their website or visit an. We sell parts and components for mcintosh hifi audio. Remove the driver plugin circuit boards from the power amplifier. Remove the knobs from amps that have glass front panels otherwise we could be looking for. Unfollow mcintosh amplifier to stop getting updates on your ebay feed. Mcintosh mc2505 the solid state amplifier that change the world as any vinyl enthusiast will agree, the pure audio enjoyment of this hobby will only go as far as the limitations of your system. This is a pair of 2070 fully tested, working date code 1979. Mcintosh diagrams, schematics and service manuals download for free. Jun 30, 2007 until i found mcintosh, i changed amps and brands every 6 months. A key part of the rebuild is to install the upgraded predriver transistors and rebias the amp with 18 ohm resistors replacing the 22 ohm resistors.
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. Technical description the new mclntosh ma230 combines, for the first time, a mclntosh engineered stereo solid state preamplifier and tube power amplifier on the same chassis. It can be utilized either as a 300wattperchannel stereo amp, or a 600watt monoblock, and was rated by its manufacturer as being able to produce this amount of power continuously, with very little less than 0. The mc2300 is a solidstate power amplifier which was built by the american highend audio company mcintosh, and sold between the years 1971 and 1980. Mcintosh mc2300 amplifier for sale canuck audio mart. It looks that the correct value of r119120 depends on the version of the amp and the type of driver and power transitors used. The terminal numbering of rotary switches is for reference only. While everyone has varying opinions on what is the most integral link in the audio chain. I was one of the people who thought that mcintosh was for doctors and lawyer types who knew squat about audio and just wanted to show off sort of a highend version of bose. Device owners manual service manual brochure catalog miscellaneous pictures device.
Mcintosh mc2300 driver boards transistors diyaudio. One very good 300wattch mcintosh mc 2300 power amplifier. Transistors in mc2100, mc2105, and mc2300 power amplifiers. Mcintosh mc30 rebuild first installment turret boards for. Used mcintosh mc2300 stereo power amplifiers for sale.
Mcintosh mc30 rebuild first installment turret boards. Ive had my mc252 for over 18 months now and i listen to more music than i ever have. New power supply filter new bias supply and adjust new capacitors in signal path check all resistors full check out for power and distortion mx110 and mc225 full power supply and audio upgrades. The heavy 1 ines on the schematics denote the primary signal path. Corderman joined the company in 1949, when frank mcintosh and gordon gow founded it. The mclntosh mc 2300 solid state stereo power amplifier. His 52year career with mcintosh is probably the longest association of any individual with any one company in the industryexcept for paul klipschs nearly six decades with the company that bears his name. Later, mcintosh used a mpsa05 2171 and mpsa55 2172 pair as replacements. Mcintosh mc2200 manual stereo power amplifier hifi engine. I think the mc2100 is almost identical to the mc2105 except for the casing.
My problem is, the transistors are nla, part number from mcintosh is 2070, number on the transistor is 32070, motorola. Mcintosh laboratory is an american manufacturer of handcrafted highend audio equipment based in binghamton, new york. Could an oldschool tube amp make the music you love sound. Sidney corderman is a living link to mcintoshs origins. Siliconplanar transistors were selected because of their high thermal stability, low leakage, low noise, and superior high frequency response. For your protection, we thoroughly investigate the validity of all credit card charges.
First, audioxpress magazine ran an article a few years back about a complete restoration of a mc2100. It can be utilized either as a 300wattperchannel stereo amp, or a 600watt monoblock, and was rated by its manufacturer as being able to produce this amount of power continuously, with very. Company in washington state service audio video home electronics. Until i found mcintosh, i changed amps and brands every 6 months. One of the pioneers of audio electronics, mcintosh laboratory got started with an idea. The use of 10 complementary connected output transistors per channel, allows not only full power output into normal loads, but extra high current output to drive uneven speaker loads. Mcintosh mc2505 the solid state amplifier that change the world. Cofounders frank mcintosh and gordon gow came into electronics from world war defense communications jobs and later operated a consulting firm in washington, d. We sell parts and components for mcintosh hifi audio equipment. Mc33926pnbr2 motor driver cmos parallel 32pqfn 8x8 from nxp usa inc pricing and availability on millions of electronic components from digikey electronics. Ive sold the matching c30 preamplifier, so this is just sitting in the box waiting for someone to enjoy it. I dont like guesswork and was thinking replacing r119120 by a high quality adjustable. If you could find one in sweden, or have one shipped, thats within your budget, i think you would.
Many amplifiers, including mcintosh, could be inadvertently driven into clipping. The grateful deads wall of sound from 1974 was driven by 48 mcintosh mc2300 amps. Output transistors used such units as biamp, marantz, mitsubishi, nad, onkyo, pioneer, rotel, sansui, technics, yamaha and others. The circled numbers on the dotted i ines correspond to the numbers on the pc board layouts. I thought you posted that you rebuilt the driver boards. If you suspect that a transistor is causing an issue, you can take two different approaches to testing transistors in circuit with a multimeter, depending on the type of transistor. It has been serviced by syd beaumont at ideal innovationstire kickers stay away.
Im using a mcintosh c33 with my mc2300 and it sounds great. Double boxing is used for extra protection on most items and your shipment is insured. It has the same slant front and chrome and black chassis that the golden era mac tubes had, but with heat sinks and transistors where the tubes ought to be. Units were placed on boards covered with carpet underlayment and rolled. If you have the mcintosh double box shipping carton use it. Use lamp cord, bell wire, or wire with similar type of insulation to connect the speakers to the amplifier. Technically speaking, mcintosh amplifiers are, of course, wellknown for their transformer coupling. The mcintosh ma252 is a oneofakind hybrid amplifier mcintosh has been always associated with high quality and beautiful styling, producing vacuumtube amplifiers since its early days, including the famed mc275 stereo amp, that was and still is a big hit among audio enthusiasts. Discussion in audio hardware started by erikullvin, may 23, 2014. I had them for sale on the website here and i could of sold 4 pair since then. Transistors in electronic circuits do not fail often. I found that one of the driver boards was original while the other had the service bulletin performed.
View and download mcintosh c2300 owners manual online. Output transistor stereo receiver amplifier crossreference chart transistor crossreference chart showing stereo receiver amplifier models that use the same original oem output transistors semiconductors. We sell parts and components for tv and vintage audio gears. I am trying to repair a mcintosh mc 2205 power ampi have narrowed it down to the power supply or meter pcbs behind the power metersdoes anybody know the 2n number on the transistors used and the opamp comparator number that is used on theses two boards thanks don aka hifidoctor p. Some speaker designs have impedance characteristics that may dip to as low as 1. I am trying to repair a mcintosh mc 2205 power ampi have narrowed it down to the power supply or meter pcbs behind the power metersdoes anybody know the 2n number on the transistors used and the opamp comparator number that is used on theses two. Large or heavy items can be crated at an additional charge. Amp has been used in a home environment all its life so it shows rather well. Mcintosh was on the second floor of the old downtown building. The mcintosh ma252 is a oneofakind hybrid amplifier. Its been a while since ive had a classic amplifier in my system, and mcintosh laboratorys mc275 is as classic as they come.
Mc 2300 filter caps audiokarma home audio stereo discussion. Mcintosh mc2300 mc2300 amplifier service manual orig mcintosh power output transistor320701. One amp was missing the meter driver board and one output driver board, the other amp was missing both driver boards. As for tube amps, this means socalled unity coupled circuit switching, whereby two primary strands, one connected through the power supply to the plate and cathode of one of the output tubes, and the other in the same way to the another tube, are tightly wound together for complete magnetic. Mcintosh mc 30 power amplifiers set 1after and before these amplifiers were in extremely sad shape. To avoid delays, we prefer to send credit card orders to your billing address only. To purchase mc2300 spares or accessories, please contact the company via their website or visit an authorised retailer. Mcintosh warrants to the original owner that this product shall be free from defects in workmanship or materials for a term of three 3 years from the date when it was purchased from an authorized mcintosh dealer. Mcintosh mc2300 power amplifier in very very good condition. A power transistor circuit prevented excessive voltage from being delivered to the lamp.
There was a service bulletin for the mc2100mc2105 mc2300 that changed a couple of transistors as well as a few resistors and capacitors. With most of the amps in the companys current catalog relying on solidstate transistors, mcintosh went for a different approach these days, designing its first. Mcintosh mc50 2channel home audio the klipsch audio. The 2032 is similar to a 2n3645 and according to my mcintosh info, is an approved replacement. Newer and better power transistors rebuilt driver boards better power caps every circuit checked and newerbetter parts installed, including resistors, connectors and the use of shielded wiring where necessary too many to list. Mcintosh transistor pair 2070 motorola mc2300, etc. Corderman joined mcintosh and was placed in charge of engineering, research and development. If the driver boards have round, saucer looking heat sinks the amp has the updated predriver transistors, the mandatory upgrade we needed to do at amp clinics back in the 80s. Mcintosh expanded into the car audio and home theater areas since the clarion purchase. You also remove and add some ceramic caps to control possible oscillations. Mcintosh mc2300 stereo power amplifier for sale canuck.
Mcintosh mc2200 manual stereo power amplifier hifi. To purchase mc2200 spares or accessories, please contact the company via their website or visit an authorised retailer. This amplifier was in my main system for several years and ive been hesitant to let it go since ive found this to be the most pleasant sounding of the open chassis mcintosh amplifiers. Because of the high power available it is necessary to emphasize some prudent and. Meanwhile, engineering was working on the first 12volt car amplifier. Discussion in audio hardware started by erikullvin. Free mcintosh diagrams, schematics, service manuals. Mcintosh the compendium vintagemacs mcintosh compendium has moved. The mc2100 is on a tube amp chassis while the mc2105 is in their woodglass case. How to diagnose a circuit board with a bad transistor. Frank van alstine recommended a modification to the dynaco pat 4back in the late 70s that i applied to the preampdriver boards on this amplifier also. One unit took me about 2 years but well worth the money and time. Mcintosh mc2300 becomes unstable at 120 volts page 2.
I think that these boards are the same as many mc amps i know that the drivers q112114 are 2n5320 and 2n5322 but what are the q108q110 and q102q104 do someone has an idea about the original parts numbers or replacement parts numbers that have the same characteristics as original parts. Three transistors are used in each channel of the phono preamplifier section. This website is not affiliated with or sponsored by mcintosh. New stainless steel chassis were procured and a ground up restoration was begun. The mclntosh mc 2300 is a high quality, extremely high power, solid state stereo amplifier. Mr71 audio path upgrade using solen, pheonix, and iec capacitors, included in this upgrade is a full rf, if, and demultiplex alignment. I have to replace the transistors in a mc2300 driver boards. Transistor crossreference chart showing stereo receiver amplifier models that use the same output transistors.
1185 330 1026 1216 921 1315 1179 458 906 111 1560 538 48 619 803 182 806 212 172 1411 248 212 1016 973 150 270 1442 1004 766 82 503 1360 668 1037 264 1032 940 1400 35 741 1021 1162 1371 1247