Akai GX-1900 (1973)
Reel / Cassette Combination Stereo Tape Recorder:
Heads: 1 x record/play, 1 x erase
Motor: 2 speed motor
Reel size: up to 7 inch reel
Tape speeds: 3 3⁄4  7 1⁄2 ips
Wow and flutter: 0.12% (7 1⁄2 ips)
Frequency response: 30Hz to 22kHz (7 1⁄2 ips)
Signal to Noise Ratio: 50dB
Total harmonic distortion: 2%
Crosstalk: 45dB
Input: 50mV (line), 3mV (DIN), 0.5mV (mic)
Output: 1.228V (line)
Dimensions: 375 x 435 x 248mm
Weight: 20.5kg

Akai SW-160 (1970-1972):
Type: 4-way, 6 speakers, bass reflex
Chassis:
woofer: 300 mm cone
midrange driver: 1x 160 mm, 1x 130 mm
Tweeter: 50 mm (x2)
Super tweeter: 45 mm
Power handling (nominal/music): - W / 60 W
Frequency response: 25 - 22'000 Hz
Efficiency: 103 dB / W / m
Transitional ranges: 800 Hz, 5'000 Hz, 10'000 Hz
Impedance: 8 Ohm
Weight- 24kg

Akai AA-8500
Solid State AM/FM Multiplex Stereo Tuner Amplifier (1970)
Tuning range: FM, MW
Power output: 65 watts per channel into 8Ω (stereo)
Frequency response: 20Hz to 50kHz
Total harmonic distortion: 0.05%
Input sensitivity: 3mV (MM), 200mV (DIN), 150mV (line)
Signal to noise ratio: 70dB (MM), 80dB (line)
Channel separation: 60dB (MM), 60dB (line)
Output: 150mV (line), 25mV (DIN)
Semiconductors: 65 x transistors, 1 x FET, 2 x IC, 29 x diodes, 1 x VC diode, 1 x tuner diode, 4 x thermistors
Dimensions: 487 x 165 x 346mm
Weight: 16kg