Aiwa WX220 - double tape deck. Partially tested, read description

Aiwa WX220, sophisticated double tape deck from 1983, tape deck 1 plays audio a bit darker and with the Left channel a bit quieter than the Right channel than tape deck 2, which works fine.
Recording functions not tested.
Aesthetic conditions very nice, play buttons are a bit harder to press than the others but are working. Selling as is, I ship only in Europe, proper packaging guaranteed

Here a description of the deck taken from the "Hi Fi Engine" website:

"The Aiwa AD-WX220 is no ordinary double cassette deck. Why? Because it offers four times the performance.

The AD-WX220 has a high precision double speed which enables you to copy tapes in half the time.

But there's more; using the ALL-TRAC recording system, both sides of the tape can be copied simultaneously.

Add it together and it's the deck that copies your tapes four times faster than conventional double cassette decks.

Together with microprocessor assisted random program editing, tape dubbing operations are finished quickly and efficiently - now that's extraordinary performance.

Specifications

Type: double compact cassette deck

Track System: 4-track, 4-channel

Tape Speed: 4.8, 9.5 cm/s

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

Motor: 2 x DC servo, 2 x DC

Tape Type: type I, CrO2, Metal

Noise Reduction: B, C

Frequency Response: 20Hz to 18kHz  (Metal tape)

Signal to Noise Ratio: 73dB  (dolby C)

Wow and Flutter: 0.038%

Total Harmonic Distortion: 3% 

ElectricalTest & Measurement

Input: 50mV (line)

Output: 0.51V (line)

Dimensions: 420 x 110 x 317mm

Weight: 5.6kg

Year: 1983"