Technics SU-7700 (1978)

Technics has expanded thier line of integrated amplifier to include this moderately-priced unit.
It features output meters, an effective subsonic filter, elaborate taping facilities and fine overall performance. Technics is rapidly becoming an important factor in the market, and this amp should help to continue that trend.

50 watts per channel, minimum RMS, both channels driven, at 8 ohms from20 Hz to 20 kHz, with no more than 0,08% THD.

Amplifier Section

Continuous power (1 kHz): 70 W + 70 W at 4 Ω (both channel driven); 53 W + 53 W at 8 Ω

Power (20 Hz - 20 kHz): 60 W + 60 W at 4 Ω (both channel driven); 50 W + 50 W at 8 Ω

Power bandwidth: 8 Hz ~ 55 kHz , -3 dB (both channel driven at 8 Ω)

Total Harmonic Distortion:

0,08% at rated power (20 Hz - 20 kHz);

0,035% at half power (20 Hz - 20 kHz);

0,01% at half power (1 kHz)

Intermodulation distortion: 0,08% (60 Hz : 7 kHz = 4 : 1, SMPTE)

Residual Hum and Noise: 0,6 mV

Damping factor: 25 (4 Ω), 50 (8 Ω)

Input Sensitivity and Impedance:

Phono: 2,5 mV/47 kΩ

Tuner, Aux: 150 mV/47 kΩ

Tape1 Playback: 180 mV/47 kΩ

Tape2 Playback: 150 mV/47 kΩ

Tape1 Rec/Play: 180 mV/47 kΩ

Phono Max. Input Voltage: 150 mV (1 kHz, RMS)

Signal-to-Noise Ratio (IHF, A):

Phono: 78 dB

Tuner, Aux: 97 dB

Frequency Response:

Phono: ±0,2 dB, RIAA standard curve

Tuner, Aux: 5 Hz - 80 kHz, +0 dB, -3 dB; 20 Hz - 20 kHz, ±0,5 dB

Tone Controls:

Bass: +12 dB, -12 dB (50 Hz)

Treble: +12 dB, -12 dB (20 kHz)

Equalizer Subsonic Filter: 30 Hz, -12 dB/oct

High Filter: 8 kHz, -6 dB/oct

Loudness control (volume at -30 dB): 100 Hz, +8 dB

Output Voltage and Impedance:

Rec Out (Tape 1, 2): 150 mV/1,2 kΩ

Rec/Play (Tape 1) output: 30 mV/82 kΩ

Load Impedance:

Main or Remote: 4 - 16 Ω

Main + Remote: 8 - 16 Ω

General

Power Consumption: 450 W

Power Supply: 110/120/220/240 V, 50/60 Hz

Dimensions (W x H x D): 410 x 139 x 334 mm (16-5/32" x 5-15/32" x 13-5/32")

Weight: 9,7 kg (21,4 lbs)