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The best in professional and vintage audio equipment, brought to you by {name}  

Matthew McIvor

Sansui B-77 Amplifier, C-77 Pre-amplifier and RG-7 Equalizer set! 

A well regarded treasure for the vintage enthusiastic. Hi-Fi made in Japan. Tested with headset plug and working.

Please see pictures as those form part of the description. Small few marks, but not significant considering the equipment age. Top metal cover has signs of rust.
Comes with power cords. Included: an extension cord (due to power cable from the pre-amplifier quite short).

Sansui B-77 is a stereo power amplifier of 60 watts per channel, made in Japan, between 1980-1983.

Core Technical Specifications
- Power output (RMS, both channels driven, 20–20,000 Hz): 60 W per channel into 8 Ω
- Power output (1 kHz): 70 W per channel into 8 Ω
- Total harmonic distortion (THD): ≤ 0.03% at or below rated output
- Frequency response: 5 Hz – 70 kHz (+0 dB / –2 dB)
- Signal‑to‑noise ratio: 115 dB
- Input sensitivity / impedance: 1 V / 47 kΩ (for rated output)

Electrical & Power
- Power consumption: 255 W (rated)- 350 W (maximum)
- Voltage: 220–240 V (50/60 Hz)

Physical Characteristics
- Dimensions: 430 × 148 × 230 mm (W × H × D)
- Weight: 6.4 kg
- Finish: Silver aluminum front plate

Connectivity
- Speaker outputs: 2 pairs (A/B switching) (can use A, B and A+B)
- Headset connection

Input:
- RCA from pre-amplifier

Special features: 
- LED peak display
- Spectral analyzer
- Auto dimmer

Sansui C-77 pre-amplifier made in Japan, between 1980-1982

Core Audio Performance
- Frequency response: 5 Hz – 70 kHz (+0.5 dB / –2 dB)
- Total harmonic distortion (THD): ≤ 0.03% (AUX, TUNER, TAPE at 1 kHz, 1 V)
- RIAA equalization accuracy (Phono): ±0.5 dB

Input Sensitivity & Impedance
- Phono MM: 2.5 mV / 47 kΩ (max input 100 mV)
- Phono MC: 0.18 mV (HiFi Engine) or 0.1 mV / 10 Ω (HiFi‑Wiki) — depending on region
- Line inputs (AUX, TUNER, TAPE PLAY): 150 mV / 47 kΩ
- Microphone input: 7 mV (HiFi Engine)

Output Levels
- Line output: 150 mV / 47 kΩ
- Pre‑out: 1.0 V / 47 kΩ
- Tape REC: 150 mV / 47 kΩ

Noise & S/N Ratio
- Phono MC: 60 dB (HiFi Engine) or 62 dB (HiFi‑Wiki)
- Phono MM: 80 dB
- Line inputs: 90 dB

Tone & Filter Controls
- Bass: ±10 dB at 50 Hz
- Treble: ±10 dB at 10 kHz
- Low filter: 30 Hz, 6 dB/octave
- High filter: 7 kHz, 6 dB/octave

Power & Build
- Power supply: AC 220–240 V 
- Dimensions: 430 × 74 × 247 mm
- Weight: 3.1 kg
- Finish: Silver aluminum front plate

Background & Position in Sansui Lineup
The C‑77 was part of Sansui’s early‑80s “slimline” separates, typically paired with the B‑77 power amplifier. It offered both MM and MC phono stages, making it suitable for high‑quality vinyl playback even by modern standards.

Sansui RG-7 is a 10 band graphic equalizer made in Japan, between 1981-1983 

Core Audio Specifications
- Frequency response: 20 Hz – 20 kHz (±0 / –0.5 dB)
- Total harmonic distortion: 0.05% (20 Hz–20 kHz, 1 V output)
- Signal‑to‑noise ratio: 70 dB (A‑weighted, short‑circuit)
- Channel separation: 60 dB at 1 kHz

Equalizer Section
- 10 frequency bands: 30, 60, 125, 250, 500, 1k, 2k, 4k, 8k, 16 kHz
- Control range: ±12 dB per band
- Semiconductors: 19 ICs, 10 transistors, 6 diodes, 4 zener diodes

Inputs & Sensitivities
- Source / Tape Play: 150 mV / 47 kΩ (max input 5 V)
- Microphone: 0.8 mV / 10 kΩ (max 25 mV)
- Guitar: 9 mV / 100 kΩ

Outputs
- Tape Rec: 150 mV
- Pre‑amp output: 150 mV

Special Features
- Electronic reverb using BBD (Bucket Brigade Device) delay circuit — more natural than spring reverb units
- Pan‑pot function for moving the stereo image freely (useful with microphones)
- Two microphone inputs with mixing capability
- Guitar input with selectable routing
- Front‑panel effect assignment (line and/or mic)

Power & Build
- Power consumption: 16 W
- Voltage: 220–240 V 
- Dimensions: 430 × 87 × 228 mm
- Weight: 3.3 kg (net)
- Finish: Silver aluminum front plate

Position in Sansui’s Lineup
The RG‑7 was part of Sansui’s early‑80s “sound consolette” series, combining EQ, reverb, mic mixing, and guitar input in one unit—aimed at home musicians, karaoke setups, and users wanting creative sound shaping beyond standard equalization.

Shipment: total weight approx. 19 kg.
Shipment will be packed with care and extra protection for transportation. 


Good - Number of items: 3 - Including: Hi-fi set - Power cord

Sansui - B-77 Amplifier, C-77 Pre-Amplifier, RG-7 Equalizer Hi-fi set - Multiple models

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In original wooden case

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Sansui - B-77 Amplifier, C-77 Pre-Amplifier, RG-7 Equalizer Hi-fi set - Multiple models

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