Akai AM-U7

Name: Akai AM-U7
Brand: Akai

Integrated stereo amplifier from the early 1980s featuring discrete open-loop design and MC phono input.

Overview

The Akai AM-U7 is a stereo integrated amplifier produced in the early 1980s, recognized as one of Akai's most popular products. It features a discrete-component, open-loop circuit design with a toroidal transformer and two 15,000µF 63V capacitors for power supply stability. The amplifier delivers 80W per channel into 8 ohms (20Hz–20kHz, 0.5% THD) and 100W into 4 ohms (0.7% THD), with a music power rating of 190W total. It includes a moving coil (MC) phono input and a 'line straight' mode that bypasses tone controls for direct signal path.

Specifications

Power Output (RMS)	80W per channel into 8 ohms (20Hz–20kHz, 0.5% THD)
Power Output (1kHz)	90W per channel into 8 ohms (0.5% THD)
Power Output (Dynamic)	100W per channel into 4 ohms (0.7% THD)
Music Power	190W total
Circuit Type	Open loop, discrete components
Feedback System	Non-NF circuit, Zero Drive, Dual Pole DC servo
Transformer	Toroidal
Capacitors	Two 15,000µF 63V
Phono Input	Moving coil (MC)
Feature	Line straight mode (tone control bypass)

Design

The AM-U7 uses an open-loop circuit with discrete components and no overall negative feedback (Non-NF), incorporating Zero Drive and Dual Pole DC servo technology for DC offset stability. Its interior is noted for quality construction and component layout. The front panel features a plastic faceplate consistent with Akai’s early 1980s “space age” styling.

Market

Listings from 2021 to 2026 show functional units selling for around CA$190, with parts or repair units priced up to $199. Manuals and schematics are commonly sold separately for $12–$25. The amplifier has seen more market activity and discussion in European countries like Germany and France than in North America.

eBay Listings

View Akai AM-U7 on eBay

As an eBay Partner, we earn from qualifying purchases. This helps support our independent vintage technology research.