Technics RS-M50

Commentary

This stereo cassette deck is equipped with a variety of functions while maintaining the basic performance of a digital deck.

The drive motor is a digital FG servo motor.
In this motor, we propose a rotational speed drift of up to 0.15% by means of a circuit method that cancels the environmental change of the reference signal. We also reduce the influence of external noise by adopting a unique cutoff system for IC.

A vertical hold system is adopted for the tape travel system.

A high-precision flywheel with a diameter of 83.5 mm and dynamic balance of 1g ・ cm or less is adopted. In addition, a spring is provided to suppress thrust play in one direction to stabilize tape running.

An HPF head has been adopted for the head.
This head uses hot-pressed ferrite as the core material and has a hardness equivalent to that of hard glass. Therefore, abrasion of the head surface is suppressed and stable performance is maintained for a long time. In addition, from the viewpoint of electromagnetic characteristics, it has high specific resistance, low loss over a wide area, excellent frequency characteristics, and excellent pick-up dynamic range.

As a noise reduction system, Dolby NR circuit is mounted.
This circuit has a built-in MPX filter to remove the pilot signal cause problems during FM air check.

Equipped with a music selector that detects no-signal parts.

It is equipped with a switching function of 3 stages of bias and 3 stages of equalizer in order to support various commercially available tapes.
In addition, the bias fine adjustment knob enables recording that takes advantage of the performance of various tapes more precisely.

It has a mixing circuit of MIC and LINE.

It is equipped with a memory autoplay mechanism that can automatically play the tape from the desired position.

It is equipped with Q & Review mechanism and Quick Review mechanism.

Equipped with a full auto-stop mechanism that does not burden the mechanism at the time of rewind and FF.

Equipped with timer standby mechanism, you can record absence by connecting an optional timer.

Equipped with a rewind autoplay mechanism.

There are 2 color variations, silver and black.

Model Rating

Type	Stereo cassette deck
Head configuration	Recording / reproducing : HPF head For Erase : Double Gap Ferrite
Motor used	Digital FG サーボモ Ter
Recording bias system	AC bias system
Erase Method	AC erasing system
Frequency characteristic	Normal : 20 Hz to 15 kHz CrO2 : 20 Hz to 17 kHz
Signal-to-noise ratio	57 dB (XA tape, peak level) Dolby NR in : 10 db improvement (5 khz)
Wow and flutter	0.05%WRMS
Input Sensitivity / Impedance	Mic : 0.25 mV (-72dB) / 400 Ω ~ 20k Ω Line in:60mV(-24dB)
Output Level / Impedance	Line out : 420 mv (-7.5 db) / 47k Ω or more Headphone : 60mV/8 Ω
Semiconductor used	Transistor : 34 IC : 7 Diode : 19 units
Pwer	100 VAC, 50Hz/60Hz
Power consumption	11W
External dimensions	Width 430x Height 149x Depth 267 mm
Weight	Approx. 7.3 kg