AKAI M-10

Commentary

Auto-reverse stereo tape recorder with cross field head and 3-motor configuration.

Cross-field head is used for the head part.
In the crossfield method, the signal current is designed to be applied to the recording head and the bias current is designed to be applied to the outer bias-only head, and these heads are positioned in a predetermined spatial position relative to each other, so that the signal recorded on the tape with the applied bias field can be recorded without being adversely affected by the bias field, preventing the signal once recorded from being erased or weakened by the influence of the wide bias field.
The S/N ratio of the shield head is also improved.

Equipped with a playback reverse function using sensing tape.
When a sensing tape is inserted in the tape to be used and played back, it automatically rotates in the reverse direction when the sensing pin touches the tape. By using this function, repeated playback between A and B is also possible.
It also has a manual reverse function using the reverse button.

A hysteresis synchronous 3-speed motor is used for the capstan drive motor.
In addition, two 6-pole outer rotor motors are used for the reel.

Equipped with automatic stop and automatic shutoff.
When the tape reaches the fully wound or unwound position, the automatic shut-off lever automatically drops and the tape stops automatically. In this case, only the operation of the mechanism is stopped with automatic stop, and the power supply is also turned off with automatic shut-off.
It is also equipped with an automatic pinch roller release mechanism designed to automatically move the pinch roller away from the capstan shaft during automatic stop or automatic shut-off. This keeps the pinch roller in close contact with the capstan shaft to prevent wear of rubber and deformation of the shaft.

Equipped with an automatic lever release mechanism, the automatic shut-off lever falls as soon as the tape is completely wound and the rapid forward / rewind knob automatically returns to the stop position.

An amplifier circuit using two ICs is mounted.

The track selector allows you to switch between stereo and monaural.

Equipped with tone control.

Equipped with a 4-digit tape counter with reset button.

Equipped with a VU meter.

Equipped with a universal power supply voltage switching device, it can be freely changed between AC100V ~ 240 V.

Can be used horizontally and vertically.

Two 10cmx15cm cone type speaker units are installed in the speaker section.

There were 2 kinds of variations, a leather case and a wood case.

Model Rating

Type	Tape recorder
Tape speed	4.75cm/s, 9.5cm/s, 19cm/s
Wow and flutter	0.08% RMS or less (19cm/s) 0.12% RMS or less (9.5cm/s) 0.20% RMS or less (4.75cm/s)
Frequency characteristic	30 Hz ~ 26 kHz ± 3 dB (19cm/s) 30 Hz ~ 19 kHz ± 3 dB (9.5cm/s) 30 Hz ~ 9 kHz ± 3 dB (4.75cm/s)
Signal-to-noise ratio	50 dB or more
Total harmonic distortion factor	2% or less at 1 kHz and 0 VU
Input level	Mic jack : 0.5 mV or more Line jack : 50 mV or more DIN jack : 5 mv or more (Low) 50 mV or more (High)
Music power	20W+20W
Distortionless output	15W+15W
Recording (playback) compensation characteristics	NAB characteristics
Recording bias frequency	100kHz
Recording level indication	2 x VU meter
Recording system	4-track, stereo / mono, cross-field bias
Fast-forward and rewind time	75 seconds each (370m tape, 50 Hz) 60 seconds each (370m tape, 60 Hz)
Maximum use reel	Reel 7
Heads	Cross field head system erasing, recording and re-recording
Motor	Hysteresis / synchronous 3 speed motor x1 2 x 6 Pole Outer Rotor Motors
Spekers	2 x 10cmx15cm cone shapes
Semiconductor used	Transistor : 22 IC : 2
Pwer	Can be switched in 6 stages between 100 V ~ 240 V AC, 50Hz/60Hz
Power consumption	165W
External dimensions	Width 350x Height 474x Depth 242 mm
Weight	22kg
Attachment	One #7 demonstration tape 1 x 7 Empty Reel 2 microphones One sensing tape 2 spare fuses