AKAI 1720W
¥ 60,000 (around the late 1960 s?)
Commentary
Standard type tape recorder for easy stereo sound enjoyment.
The SN ratio has been improved by shielding all heads.
Equipped with a tape lifter to prevent wear of the head when the tape is fast-forwarded or rewound.
The amplifier circuit uses a solid-state Hi-Fi amplifier with 14 silicon transistors.
It can be used both horizontally and vertically.
Model Rating
| Type | Tape deck | |
| Tape speed | 4.75cm/s, 9.5cm/s, 19cm/s 38cm/s can be handled by using a 15 inch adapter) |
|
| Tape velocity deviation | + / - 3% or less (at all tape speeds) | |
| Wow and flutter | 0.18% RMS or less (19cm/s) 0.25% RMS or less (9.5cm/s) 0.35% RMS or less (4.75cm/s) |
|
| Frequency characteristic | 40 Hz ~ 15 kHz ± 3 dB (19cm/s) 40 Hz ~ 12 kHz ± 3 dB (9.5cm/s) 40 Hz ~ 6 kHz ± 3 dB (4.75cm/s) |
|
| Signal-to-noise ratio | 50 dB or More (19cm/s) 50 dB or More (9.5cm/s) 50 dB or More (4.75cm/s) |
|
| Total harmonic distortion factor | 3% or less at 1 kHz and 0 VU | |
| Crosstalk | Mono : 55 dB or less Stereo : 43 dB or less |
|
| Isolation resistance | 50M Ω or more | |
| Isolation persistency | 1,000 V (1 min or more) | |
| Erase ratio | -65dB or less | |
| Music power | 4W+4W | |
| Recording (playback) compensation characteristics | NAB characteristics | |
| Recording bias frequency | 62kHz | |
| Recording level indication | VU meter (2) | |
| Recording / Playhead | 4-track, stereo / mono (3,600 Ω at 1 khz) | |
| Erasing head | 4-track, stereo system (3,600 Ω at 90 kHz) | |
| Recording system | 4-track, stereo / mono recording | |
| Fast-forward and rewind time | 150 seconds (370m tape, 50 hz) 120 seconds (370m tape, 60 hz) |
|
| Output Level / Impedance | Line : 1.2 V (0 VU) / 82k Ω Din:2.5V Headphone : 150mV/8 Ω |
|
| Input Level / Impedance | Line : 30mV/150k Ω Din : 10mV/50k Ω Mic : 3.5mV/20k Ω |
|
| Monitor system | Stereo headphone | |
| Recording time | Stereo : 4 hours (370m tape, 4.75cm/s) | |
| Motor | 2-speed induction motor
|
|
| Spekers | 2 x 13cmx18cm cone shapes | |
| Maximum use reel | Reel 7 | |
| Semiconductor used | Transistor : 14 Diode : 4 pcs |
|
| Pwer | Can be switched in 6 stages between 100 V ~ 240 V AC, 50Hz/60Hz | |
| Power consumption | 50W | |
| External dimensions | Width 355x Height 360x Depth 240 mm | |
| Weight | 13.4kg | |
| Attachment | One #5 demonstration tape One empty reel of #5 2 microphone (with stand) Silicon Oil x1 2 Tape Cleaner Pads 2 spare fuses |