I'm selling a pair of McIntosh MC275 mk iv amplifiers (serial numbers VN 1157 and VN 1209). I am the second owner of both amps. I started with one amp in stereo mode then added the second to run as monos. What an improvement! In mono mode they deliver 150wpc into 2/4/8 ohms. Of course these can also be used as stereo amps giving four channels. I have upgraded the tubes with recommended matched tubes from Upscale Audio as follows: Winged C 6550 output tubes, Mazda short plate 1957 12ax7 input tubes (2 input tubes per amp only-the single ended tube is the stock McIntosh 12ax7 but not used in balanced mode which I prefered), Mullard 12at7 GT Britain driver tubes. I also will include the stock KT88's and most of the input and driver tubes which still test good. Also I will include Zu Libtec jumper cables needed for mono use .
These are great sounding amps with enough real world tube power to drive almost any speaker. They are in perfect operating condition and good cosmetic condition. There are no dents or dings, but I have managed to scratch the chrome by the output terminals switching out speaker cable-not terrible but noticable. There are also a few light scratches on the chrome around the tube sockets and a very small mark on one of the transformer cases. The tube cages are perfect.
Buyer pays shipping and Paypal fees of 3.5% which will be added to the offer price. I have the original inner boxes and manuals for both amps and will double box. The shipping estimate above is for only one amp so please double that amount. I you have any questions contact me at: firstname.lastname@example.org
Description: Two-channel, tubed power amplifier with unbalanced and balanced input jacks. Tube Compliment: (3) 12AX7, (4)12AT7, (4) KT-88/6550. Rated output power: (Stereo mode) 75Wpc into 4/8/16 ohms, (Mono mode) 150 WPC into 2/4/8 ohms 20Hz–20kHz. S/N ratio: 100dB A-weighted. Frequency Response: 20Hz–20kHz, +0/–0.5dB, 10Hz–70kHz, +0/–3dB. Sensitivity: 1.2V unbalanced, 2.5V balanced. Maximum THD from 250mW to rated power: 0.5%. Maximum Intermodulation Distortion if instantaneous peak output per channel does not exceed twice the rated output, for any combination of frequencies, 20Hz–20kHz, with both channels operating: 0.5%. Wide-band damping factor: >14. Power requirements: 120V, 50/60Hz, 3.6A.