The 4000DB is an attractively designed compact tape deck offering multiple connections and controls and quality features among which are Akai's one micron gap heads for high density recording and the well known Dolby Noise Reduction System.

Tape Head

Akai's one-micron gap head is responsible for an amazingly important difference in tape recording. It's the difference between ordinary performance and high density quality recording and playback. Ordinary head gaps are from 2 to 4 microns, but the gap of this outstanding head is only one micron. This high density recording system provides excellent frequency response and clear, high pitched sound is generated as a frequency tone and recorded smoothly without distortion.

Dolby Noise Reduction

With the Dolby Noise Reduction System, hissing noise heretofore thought impossible to eliminate, is reduced to a completely inaudible level. Basically, this circuit boosts the low level signals prior to recording and lowers them by precisely that same amount at playback time. During this revolutionary process, the extraneous noise is eliminated, thus also eliminating tape hiss.

Dual Monitoring

Specifications

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

Heads: 1 x record, 1 x playback, 1 x erase

Motor: 1 x 4-pole induction

Reel size: up to 7 inch reel

Tape speeds: 3 3⁄4 7 1⁄2 ips

Wow and flutter: 0.15% (7 1⁄2 ips)

Frequency response: 30Hz to 23kHz (7 1⁄2 ips)

Signal to Noise Ratio: 55dB

Total harmonic distortion: 1%

Crosstalk: 40dB

Input: 70mV (line), 0.4mV (mic)

Output: 0.775V (line)

Semiconductors: 27 x transistors, 2 x FET, 4 x IC, 17 x diodes

Dimensions: 406 x 325 x 196mm

Weight: 12kg