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McIntosh MC275 Version IV Vacuum Tube Amplifier - $4,999 (Baldwin City)
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Great sounding and collectible amplifier from McIntosh in its MK IV (MK 4) designation which is second next to newest. Not old enough to be considered vintage, but new enough to have all the reliability benefits of the newer generation models including balanced inputs and usable speaker terminal strips.
The MK IV sounds as good, if not better than the current MK VI (MK 6), and foregoes what many think to be silly LED lighting on the tubes and the more complicated speaker binding posts.
This amplifier was also fitted with a full set of official Russian Genalex Gold Lion KT88 and new McIntosh Branded JJ 12AT7 and 12AX7. The original tube cover "cage" is also included as well as the manual forming a complete kit, in superb condition.
Best of all have theofficial McIntosh box for safe travels.
Technical Notes:
Tube Notes:
This amplifier was fitted with a strong testing set of Russian Genalex Gold Lion KT88 and new McIntosh Branded JJ 12AT7 and 12AX7.
Brand Background:
McIntosh Laboratory is an American manufacturer of handcrafted high-end audio equipment based in Binghamton, New York. The company was founded in 1949 by Frank McIntosh. The company designs and produces audio amplifiers, stereo tuners and other consumer electronics products.
Connections:
RCA and XLR Inputs, Removable Power Cord, Screw Terminal Speaker Connectors.
General Sound:
Big beautiful musical sound with little fatigue.
Cosmetic Condition:
9/10 = Very Good. Excellent front faceplate, one minor flaw on chassis side or top. See our detailed rating description here.
Working Condition:
Working perfectly and tested in our lab and listening room.
Included:
Unit, manual, and power cord.
Manual:
Click Here
Packing:
Original Manufacturers Packing
Specs:
CONTROLS and CONNECTORS:
• Speaker barrier strips for 4, 8 and 16 OHMS
• XLR BALANCED INPUTS (L+R)
• RCA UNBALANCED INPUTS (L+R)
• UNBALANCED GAIN controls: 2.5V to 1.0V
• MODE Switch: MONO or STEREO
• INPUT Switch: XLR Balanced or RCA Unbalanced
TECHNICAL SPECIFICATIONS:
Power Output:
75 Watts Per Channel (Stereo Mode)
150 Watts Total Bridged (Mono Mode)
Frequency Response:
20 - 20 kHz (+0 -0.2dB)
Distortion:
0.5%
Noise & Hum:
-100 dB (A weighted)
Output Impedance:
4, 8, 16 ohms in Stereo Mode
2, 4, and 8 ohms in Mono Mode
(25 V line)
Damping Factor:
Greater than 10
Input Impedance:
100 k Unbalanced
180 k Balanced
Input Sensitivity:
1.0 V Unbalanced
2.0 V Balanced
(Unity Coupled)
Power Requirements:
120V at 400 Watts
Tube Complement:
4 x KT88/6550 output
3 x 12AX7A
4 x 12AZ7
(Solid state rectifier Bridge)
Dimensions:
7-1/2" H, 12" W, 16" D
Weight:
67 lbs