Audio Database

AD-FF60
Commentary

Stereo cassette deck equipped with Active Servo Bias (Dolby HX Pro).

The Dolby HX Pro system developed by B & O Co. in response to the digital age has been successfully commercialized with higher precision and is equipped with an active servo bias system.
This method focuses on the problem of the self-bias effect in which the high-frequency component of the music signal acts as part of the bias current and causes over-bias, resulting in degradation of the high-frequency MOL. The IC servo bias circuit always stably controls the effective bias value, which is the total of the music signal and the bias current applied to the recording head, at an appropriate value.
The operation mechanism adjusts the bias amount to active in the actual dynamic characteristics according to the level of the high-frequency component of the music signal, thereby suppressing the saturation of the tape that tends to occur with high-level high-frequency signals.

Uses the DX Combination 3 head system for the head.
This head uses a special structure that uses Sendust for the guard part and a hard composite material for the core spacer to greatly improve abrasion resistance. In addition, the head part uses a thin core laminated in multiple layers to reduce loss in the high-frequency range and improve high-frequency characteristics.

The mechanism employs a superstabilized torsion dual capstan mechanism, which not only improves wow and flutter values but also improves sound quality factors such as level fluctuation and modulation noise.
In this mechanism, a capstan with a special surface treatment using Aiwa's unique micrograin processing is used on the take-up side. This reduces slippage that occurs between the capstan and the tape, and prevents torque fluctuation and vibration of the take-up reel shaft, as well as effects from other drive systems. As a result, the tape that runs between the two sets of capstan and the pinch roller has a constant tension from the beginning to the end of winding and a constant head touch. As a result, the tape that runs between the two sets of capstan and the pinch roller has a constant tension from the beginning to the end of winding and a constant head touch. This improves interference factors such as dropouts and level fluctuations.
In addition, the AD-FF60 uses system servo to improve the rotational accuracy of the motor.

Equipped with Aiwa's original automatic demagnetization system ADMS (Automatic Demagnetization System).
In ADMS, each time the power switch is turned on, a degaussing oscillator in the deck sends a high-frequency current to the head, and degaussing is completed in less than 1.5 seconds, thus keeping the head clean at all times.

It is equipped with a bias fine adjustment mechanism that takes the best tuning of normal chrome tape.
By utilizing the simultaneous recording and monitoring mechanism of the three head system, we have been able to set the most appropriate bias for each tape.

It is equipped with an intro play function that automatically plays the beginning of a song for about 8 seconds and fast-forwards it one after another.
In addition, the music sensor function can detect the beginning and end of one song with one touch operation.

Equipped with auto tape selector, double Dolby B/C, MPX filter and auto Rec mute function.

Equipped with 12-point LED meter with peak hold, peak value display for each tape, multifunctional electronic counter with tape time display, microphone terminal, remote control terminal, etc.

Model Rating
Type 3-head cassette deck
Motor For Capstan : System Servo Motor
For Reel : DC Motor
Heads Recording : Combination DX Head
Erasing : double-gap sendust heads
Wow and flutter
(Use aiwa test tape)
0.028%(WRMS)
± 0.05% (WPeak)
Frequency characteristic
-20VU recording : Normal tape : 20 Hz to 19 kHz
CrO2Tape : 20 Hz to 20 kHz
Metal tape : 20 Hz to 21 kHz
0 VU Recording : Normal : 20 Hz to 11 kHz ± 3 dB
CrO2Tape : 20 Hz ~ 14 kHz ± 3 dB
Metal tape : 20 Hz ~ 17 kHz ± 3 dB
Signal-to-noise ratio
(Metal Tape Peak Level)
Dolby NR off:60dB
Dolby B on:68dB
Dolby C on:75dB
Distortion factor 0.9% (Metal Tape)
Input Sensitivity / Impedance Mic : 0.3mV/200 Ω ~ 10k Ω
Line : 50mV/50k Ω or more
Output Level / Impedance Line : 0.41V/50k Ω or more
Headphon : 1.5mW/8 Ω
Fast forward and rewind time 70 seconds (C-60)
Autostop system Pure electronic full autostop
Power supply voltage 100 VAC, 50Hz/60Hz
Power consumption 26W
External dimensions Width 420x Height 110x Depth 280 mm
Weight 5.5kg