McIntosh MC7150 (1991-1995)
A solid-state stereo power amplifier using output transformer coupling and derived from the MC2600 design
Overview
The McIntosh MC7150 is a 2-channel solid state power amplifier produced from 1991 to 1995. It delivers 150 watts per channel into 2, 4, or 8 ohm loads and was developed using technology inherited from the high-end MC2600 amplifier. The unit features an output transformer to improve thermal stability and protect against overloads, a hallmark of McIntosh's engineering approach.
Specifications
| Year of Production | 1991 - 1995 |
| Power Output | 150 Watts per channel (2/4/8 Ω) |
| Output Impedance | 2 Ω, 4 Ω, 8 Ω |
| Frequency Response | 10 Hz to 100 kHz, +0 -3.0 dB (at 1W) |
| Total Harmonic Distortion | 0.005% or less (20 Hz - 20 kHz, 250 mW to 150W) |
| Intermodulation Distortion | 0.005% or less (20 Hz - 20 kHz) |
| Signal-to-Noise Ratio | 105 dB (A-weighted, at rated output) |
| Dynamic Headroom | 1.8 dB (IHF) |
| Damping Factor | 40 or more |
| Input Impedance | 20 kΩ (unbalanced) |
| Input Sensitivity | 1.4 V (Input VR Full) / 2.5 V (Input VR Center Click) |
| Power Requirements | 100 VAC, 50Hz/60Hz, 0.5A ~ 7A |
| Dimensions (W x H x D) | 410 x 145 x 416 mm (including terminals) |
| Weight | 26.3 kg |
| Original Price | ¥ 390,000 |
Design
The MC7150 uses an output transformer to reduce operating temperature, enhance stability, and guard against overloads. The amplifier circuit after the pre-drive stage employs a symmetric design developed for the MC2600. Each channel’s final stage uses three parallel metal-can high-reliability transistors (12 total). Protection systems include Power Guard with a visual indicator that reduces gain during clipping and a current limiter circuit. Input sensitivity is adjustable via independent left and right continuous variable level controls.
Product Family
Developed from MC2600 technology, inheriting core amplifier and protection circuit designs from the higher-end model.
eBay Listings
As an eBay Partner, we earn from qualifying purchases. This helps support our independent vintage technology research.
Related Models
- McIntosh C47 (2020-present)
- McIntosh C712 (1998-2002)
- McIntosh MAC4200 (1995-1999)
- McIntosh MC2002 (1993-1999)
- McIntosh MC2250 (1977-1980)
- Akai AM-2850 (1975)
- Akai AP-206 (1975)
- Nakamichi BX-1 (1985)
- Acoustic Research research-ar-17 (1978)
- Acoustic Research AR-19 (1994)