Akai 4000 DS 3-Headed Reel-To-Reel Stereo Tape Recorder Japan 1973

Akai’s iconic reel-to-reel tape deck from the 70s. The Akai 4000DS is a classic, robust reel-to-reel tape recorder known for its reliability and quality sound reproduction. It's a four-track, two-channel stereo recorder designed for 7-inch reels. Key features include a three-head system with Akai's one-micron gap playback head, a single, highly efficient induction motor, and a well-designed flywheel for stable tape travel and reduced wow and flutter.
The Akai 4000DS is a four-track, two-channel stereo reel-to-reel tape recorder designed for 7-inch reels. It features a monitor selector switch (Tape & Source). The machine also offers automatic shut-off when the tape ends, and it has two tape speeds: 3-3/4 and 7-1/2 inches per second (ips). The 4000DS was designed to be versatile, operating in both vertical and horizontal positions.

The deck has new belts, both the player and the recorder heads are immaculate. This item has been completely restored and cleaned, tested, fully functional.

Specifications

Manufacturer: Akai Electric Co., Ltd.; Tokyo
Model: 4000 DS
Type: 3-head coil tape
Serial number: 90801-08426
Years of manufacture: 1973 - 1976
Made in: Japan
Color: Silver / Black, housing wood walnut
Power type and voltage: Alternating Current supply (AC) / 220 Volt
Power consumption: 30 W
Material: Wooden case with metallic front panel. 
Dimensions (WxHxD) 405 x 315 x 140 mm / 16 x 12.4 x 5.5 inch
Weight: 11.5 kg

Connections 
Number of inputs:
Microphone: 0.5 mV
Line: 50 mV 
DIN:

Number of outputs
Line: 1.23 V
DIN:
Headphones: 30 - 40 mV at 8 Ohm
Technical Data 
Max. coil diameter: 18 cm
Drive: 1 motor
Heads: 3 (one head each for recording and playback, 1 ferrite erasing head)
Tracks: 4
Tape speed: 9.5 / 19 cm/sec
Overall frequency response:
- 30Hz - 17kHz ±3dB(9.5cm/sec).
- 30Hz - 22kHz ±3dB(19cm/s)
Coincident frequency response:
9.5 cm/sec: 0.25 %
19 cm/sec: 0.15 %
Signal to noise ratio: > 50dB
External voltage spacing:
Distortion factor (1000Hz, "0" VU recording): < 2 %.
Cancellation attenuation: < 70dB
Premagnetization and extinction frequency: 100kHz
Equalization: according to NARTB

Tags: Akai, 4000DS, ReelToReel, CoilTape, TapeRecorder, Vintage, Japan, Hifi