Technics RS-M85

Commentary

Stereo cassette deck with quartz D. D motor.

A flat-faced D. D motor developed by Technics is used to drive the capstan.
The D. D motor is a brushless, slotless type motor. Its structural feature is that the rotor (magnet) faces the stator (coil) in a plane. The permanent magnet rotor integrated with the flywheel rotates while being attracted to the stator side, reducing backlash in the thrust direction. In addition, the diameter of the motor is compressed to make it slimmer. However, by controlling the control circuit with the IC, the motor achieves more effects than a large flywheel.
In addition, the servo circuit uses a frequency generator (FG) to control the speed and phase. In particular, the RS-M85 achieves high accuracy by obtaining the reference frequency from quartz.

A newly developed coreless motor is used to drive the reel.
This motor has ideal conditions for reel drive such as no cogging, extremely smooth rotation, quick start-up, and excellent control characteristics. This improves tape speed fluctuation and wow flutter characteristics.

A purely electronic circuit based on IC logic using digital technology is used to control the mechanism.
The control circuit consists of a newly developed IC (I²L ICAN 6251), enabling direct switching from FF or REW to PLAY.

The SX Sendust Head, a laminate type newly developed from the element, is used for the read / write head.
The SX sendust head has excellent frequency characteristics and strain characteristics, and has a life equivalent to that of a ferrite head.

The tape selector can switch the bias / equalizer for each tape to three levels : CrO2, ex, and normal.
In addition, it is equipped with a bias fine adjustment knob, and can be adjusted within approximately ± 15% of each reference value.

Equipped with a digital FL display.

Equipped with Dolby NR system with built-in MPX filter.

It is equipped with a Rec mute mechanism that can cut part of the content during recording.

Equipped with a timer standby mechanism.

Equipped with output volume, memory rewind mechanism, full auto-stop mechanism, illuminated tape counter, etc.

Operation from a remote location is possible by connecting an optional remote controller.

Model Rating

Type	Stereo cassette deck
Head configuration	Recording / Reproducing : SX Sendust Head For Erase : Double Gap Ferrite
Motor used	For Capstan : Quartz Lock Electronic Commutator Type DD Motor For Reel : Coreless Motor
Recording bias system	AC bias system
Erase Method	AC erasing system
Frequency characteristic	Normal : 20 Hz to 16 kHz CrO2 : 20 Hz to 18 kHz
Signal-to-noise ratio	58 dB (XA tape, peak level) Dolby NR in : 10 db improvement (5 khz)
Wow and flutter	0.03%WRMS
Input Sensitivity / Impedance	Mic : 0.25 mV (-72dB) / 400 Ω ~ 10k Ω Line in:60mV(-24dB)
Output Level / Impedance	Line out : 420 mv (-7.5 db) / 22k Ω or more Headset : 80mV/8 Ω (variable)
Semiconductor used	Transistor : 123 units IC : 11 Diode : 54 pcs
Pwer	100 VAC, 50Hz/60Hz
Power consumption	Approx. 33W
External dimensions	Width 450x Height 97x Depth 403 mm
Weight	Approx. 10.5 kg
Sold Separately	Remote Controller RP 9690 (¥ 13,000) Wireless Remote Control Unit RP 070 (¥ 30,000)