Category:Mid High Fidelity (most Japanese recorders fall into this category)
Country of Manufacture:Japan
Release dates:1975 - 1979
Speeds: 3 3/4, 7 1/2
Max Reel Size("): 7"
Number of heads: 3
Head Composition: Permalloy
Head Configuration: Stereo
Frequency Response:( 3dB): 7½ ips: 30Hz to 23kHz
Wow and Flutter:less than 0.15% @ 7½ ips
Signal-to-Noise Ratio:50 dB at 7½ ips
Sound quality rating:6 / 10
Long-term reliability rating: 5 / 10
In 1972 Akai replaced the
3-year old 4000D with the new 4000DS. It was an economy deck but with
a performance to match and even exceed professional machines of a few
years earlier. Speed change was via a slip-on capstan sleeve and a rocker-type
equalisation switch – clumsy but economical.
One of the most interesting features of this deck was the lack of pressure
pads. It was unusual to find a budget machine designed with a tape transport
system so good that pressure against the rear of the tape could be dispensed
with. The advantage in reduced head wear was obvious and there was
no increase in drop-out, which might have been expected from this arrangement.
Harmonic distortion: less than 1.5% / Crosstalk: better than 50dB / Bias frequency: 100kHz / Semi-conductors: 11 transistors, 4 diodes, 4 linear Integrated circuits / Rewind speed: 150 seconds for 1,200 ft tape at 50 Hz and 120 seconds at 60 Hz / Inputs: Microphone: 0.8mV / 5k ohms Line: 60mV / 150k ohms DIN: 0.4V / 7mV / Outputs: Line: 1.23V (“0″ VU) / 100 ohms, req’d load impedance> 20k Phones: 30mV / 8 ohms / Dimensions: 12½ x 16 x 7¾ .” (314 x 406 x 194mm) / Weight: 25 lbs (11.4 kg) / quarter-track stereo