Akai 4000DS MKII

The Akai 4000DS MKII is an updated, mid-range solid-state stereo reel-to-reel tape deck produced in the mid to late 1970s as an evolution of the original 4000DS. It is known for its reliable performance, solid sound quality, and compact design.

Technical Overview

• Track System: 4-track, 2-channel stereo/monaural system

• Tape Speeds: 3 speeds — 3 3/4, 7 1/2 ips, and an optional 15 ips

• Heads: Three permalloy heads — dedicated record, playback, and erase heads, with a 1-micron gap playback head for clarity

• Motor: 1 × SSM-1 4-pole induction motor with large flywheel for stable tape travel

• Maximum Reel Size: Up to 7-inch reels

• Frequency Response: 30 Hz to 23 kHz (±3 dB) at 7 1/2 ips; slightly lower at slower speeds

• Wow and Flutter: Less than 0.15% at 7 1/2 ips

• Signal-to-Noise Ratio: Approximately 50 dB

• Total Harmonic Distortion: Less than 1.5%

• Crosstalk: About 50 dB

• Inputs: Line 70 mV, DIN 7 mV, Mic 0.8 mV

• Outputs: Line 1.228 V, DIN 0.4 V

• Dimensions: 406 mm (W) x 314 mm (H) x 194 mm (D)

• Weight: Approx. 11.4 kg (25 lbs)

• Power Consumption: Around 35 W

• Special Features:
  Tape selector switch adjusts EQ for different tape types
  Sound-on-sound recording function (SOS)
  Auto shut-off protects tape by turning off power at tape end
  VU meters linked with monitor switch for accurate input and playback levels
  Two-lever tape transport operation for ease of use
  Reliable and stylish compact design

Summary

The Akai 4000DS MKII is a solid choice for high-quality home and semi-professional tape recording and playback. It features refined motor control for smooth tape transport, excellent frequency response up to 23 kHz, and low noise and distortion performance. Its compact, durable build makes it a popular vintage deck that balances classic analog warmth with reliable solid-state electronics.