Technics - SU-CH7 Hi-fi set - Multiple models

Technics SU-CH7 + ST-CH7L + RS-CH7 + SB-HD301 – Vintage Hi-Fi System – Dolby B/C – Double Cassette – Made in Japan

Short sales description

A vintage Technics Hi-Fi system from the 1990s, consisting of the SU-CH7 amplifier, ST-CH7L tuner, RS-CH7 double cassette deck (with Auto Reverse and Dolby B/C), and a pair of SB-HD301 speakers.

SU-CH7 – amplifier

Specifications:

Power output: 2 × 25 W / 6 Ω
THD: 0.09%
Frequency response: 20 Hz–20 kHz
Inputs: Phono, Mic, DAT, CD, Tape
Phono: 3 mV / 47 kΩ
DAT/CD/Tape: 250 mV / 27 kΩ
Line S/N ratio: approx. 84 dB
5-band graphic equalizer:
80 Hz / 250 Hz / 1 kHz / 4 kHz / 12.5 kHz
Super Bass
Headphone output
Power consumption: 250 W
Dimensions: 215 × 110 × 303 mm
Weight: 4.3 kg

It is a compact amplifier, yet very well-equipped for its time.
The amplifier delivers 2 × 25 W at 6 Ω and features a 5-band graphic equalizer, Super Bass, and inputs for Phono, CD, Tape, DAT, and microphone.

The RS-CH7 is an Auto Reverse double cassette deck compatible with Normal, CrO₂, and Metal tapes, featuring Dolby B/C noise reduction.
This is one of the more interesting components of the set. Specifications
Double Cassette
Auto Reverse
4-track / 2-channel stereo
Speed: 4.8 cm/s
Compatible with Normal / CrO₂ / Metal
Dolby B + C NR
2 DC servo motors
Permalloy playback head
Permalloy record/playback head
Ferrite erase head
Wow & flutter: 0.1% WRMS
Frequency response (Metal): 30 Hz–17 kHz
CrO₂: 30 Hz–16 kHz
Normal: 30 Hz–16 kHz
S/N ratio with Dolby C: 74 dB
FF/REW (C-60): approx. 110 seconds
Power consumption: 16 W
Dimensions: 215 × 110 × 297 mm
Weight: 2.6 kg.

The ST-CH7L is an FM/MW/LW tuner with digital tuning.

Specifications
FM: 87.5–108 MHz
MW: 522–1611 kHz
LW: 144–288 kHz
FM sensitivity: 1.5 μV
FM S/N ratio: 58 dB
FM distortion: 0.3%
Selectivity: 50 dB
FM frequency response: 20 Hz–15 kHz
Dimensions: 215 × 55 × 295 mm
Weight: 1.4 kg.

The SB-HD301 speakers are Technics 2-way bass-reflex models, 6 Ω, 60 W Music / 30 W DIN. Speaker specifications:

2-way
Bass-reflex
Woofer: 12 cm cone
Tweeter: 6 cm cone
Impedance: 6 Ω
Music power: 60 W
DIN power: 30 W
Sensitivity: 85 dB/W/1 m
Crossover: 5 kHz
Frequency response:
45 Hz–30 kHz (-16 dB)
55 Hz–26 kHz (-10 dB)
Dimensions: 190 × 297 × 216 mm
Weight: approx. 3 kg/unit.

Electronics era: approx. 1991–1992
Speakers: approx. 1999
Total weight: approx. 14.3 kg
Remote control: compatible/original for the system.