AIWA AD-5500
¥ 57,800 (around 1973)
Commentary
This stereo cassette deck achieves sound quality with little distortion by stabilizing the mechanism and electric circuit.
The head is equipped with an FG (ferrite guard) head using ultra-hard ferrite with excellent wear resistance not only in the core part but also in the guard part.
It uses a large flywheel with a weight of 270g and a diameter of 86 mm, and achieves rotational energy of 2450 gcm.
In addition, a 2.5 mm φ capstan made by Schmerg in Germany is adopted.
The pinch roller holder shaft is firmly fixed to the main chassis, the parallelism between the pinch roller and capstan is accurately maintained, and stable tape travel is obtained.
We have also developed and adopted a reel shaft with a special structure to reduce friction in the cassette half and to stabilize tape running by applying a constant back tension to the reel shaft.
Electrical stability is improved by adopting a stabilized power supply for all circuits.
Equipped with a three stage bias / equalizer switching mechanism that can switch between the bias and equalizer according to the characteristics of each tape.
By separating the microphone volume from the line volume, the SN ratio during recording from the line is improved by 10 dB.
In order to reduce the hissing of cassette tapes, a Dolby system is installed.
Equipped with a large VU meter that can display up to + 6 dB.
Model Rating
| Type | Stereo cassette deck |
| Truck type | 4-track 2-channel |
| Frequency characteristic | Normal Tape : 30 Hz to 12 kHz HiFi Tape : 30 Hz to 14 kHz CrO2Tape : 30 Hz to 16 kHz |
| Signal-to-noise ratio | Dolby NR on : 60 dB (CrO2Tape) |
| Wow flutter | 0.07%(WRMS) |
| Tape speed | 4.76cm/s |
| Rewind time | 95 seconds (C-60) |
| Fast-forward time | 95 seconds (C-60) |
| Recording system | AC bias |
| Erasing method | AC Erase |
| Usable tape | C-30, C-60, C-90, C-120 |
| Motor | AC synchronous motor |
| Heads | Ferrite Guard Head (FGH) |
| Maximum Input Sensitivity / Impedance | Line : 50mV/100k Ω or more DIN : 0.1mV/2.5k Ω MIC : 0.25mV/600 Ω ~ 10k Ω Compatible |
| Reference output level / impedance | Line, DIN : 0.58 V (Dolby Level) / 50k Ω or more Headphone output : 8 Ω |
| Semiconductor used | Transistor : 36 FET : 2 Diode : 21 LED : 1 Thyristor : 1 Varistor : 2 pieces |
| Power supply voltage | 100 VAC, 50Hz/60Hz |
| Power consumption | 15W |
| External dimensions | Width 419x Height 152x Depth 295 mm |
| Weight | 6.2kg |
| Attachment | Dust cover Connection code x2 Head cleaning rod |