Akai GX-4000DB (1979–1980)

A stereo reel-to-reel tape deck with Dolby noise reduction, made in Japan

Overview

The Akai GX-4000DB is a stereo reel-to-reel tape recorder manufactured in Japan. It is part of Akai's high-fidelity analog tape deck lineup from the late 1970s. The "DB" in the model name indicates it includes Dolby noise reduction, distinguishing it from the non-Dolby GX-4000D. It supports 4-track, 2-channel stereo/monaural recording and playback at tape speeds of 3 3⁄4 and 7 1⁄2 inches per second. The unit was designed for home and enthusiast use, offering high-quality analog audio reproduction.

Specifications

Product type	Stereo Tape Deck
Country of Origin	Japan
Track system	4-track, 2-channel, stereo/monaural
Tape speeds	3 3⁄4, 7 1⁄2 ips
Wow and flutter	0.08% (7 1⁄2 ips)
Frequency Response	20Hz–20kHz (±3dB)
Tape Type	Low Noise position selector

Design

The GX-4000DB features Dolby noise reduction and shares a service manual with the GX-4000D, confirming the DB variant as the Dolby-equipped model. The service manual includes circuit diagrams and a parts list, and also applies to the black panel version of the unit.

Context

The GX-4000DB is grouped with models like the GX-4400D in user collections, sometimes referred to as part of a "Reference Master series" on social media. It appears in listings alongside other Akai professional and high-end consumer tape machines, indicating its position in a broader lineup of analog audio equipment.