Akai 4000D Pro
Akai
Japan
Tape Deck Details
Number of Motors
Number of Heads
Head Configuration
Wow & Flutter
Signal-to-Noise [dB]
Dimensions [mm]
Weight [kg]
Year built
Head Composition
Equalization
Frequency Response
Speed
7½, 15
Max Reel [inch]
Tracks
1/4 Rec/PB
Price
Additional Information
The Akai 4000D Pro is a high-quality solid-state professional reel-to-reel tape deck produced between 1975 and 1979. It is an advanced member of the 4000 series, renowned for its excellent audio fidelity and reliability.
Technical Overview
Track System: Half-track stereo (2-track, 2-channel)
Tape Speeds: Two speeds — 7 1/2 and 15 inches per second (ips)
Heads: Three permalloy heads — separate erase, record, and playback heads
Motor: Single 4-pole induction motor with a wide diameter capstan speed change sleeve designed to reduce wow and flutter
Frequency Response: 30 Hz to 27,000 Hz (±3 dB)
Wow and Flutter: Less than 0.01% WRMS
Signal-to-Noise Ratio: Better than 55 dB
Total Harmonic Distortion: Approximately 1%
Maximum Reel Size: 7 inches
Dimensions (WxHxD): 440 x 315 x 230 mm (17.3 x 12.4 x 9.1 inches)
Weight: Approximately 13.2 kg (29.1 lbs)
Voltage: 110-120V AC
Inputs: Microphone and line level inputs with fine gain control
Outputs: RCA line outputs and stereo headphone output
Additional Features:
Advanced tape tension mechanism with additional tension arm near the left reel for better tape stability
Micron gap heads ensure detailed and accurate recording/playback
No auto-reverse function
No sound-on-sound (SOS) capability
Sturdy two-lever transport system for easy operation
VU meters linked with the monitor switch for accurate level monitoring
Designed primarily for professional and high-end consumer use
Summary
The Akai 4000D Pro is regarded as a compact yet highly capable professional reel-to-reel tape deck with ultra-low wow and flutter, exceptional frequency response up to 27 kHz, and precise tape handling. Its enhancements over earlier 4000 series models include improved tape tension control and a refined transport system that boosts overall recording and playback quality. The 4000D Pro is valued by audiophiles and professionals for its reliability, clean sound, and mechanical excellence, making it a sought-after vintage reel-to-reel deck.