SANSUI AU 777D Solid State Amplifier 30+30 Watts RMS Vintage 1969 WORK Good Look

SANSUI AU-D607X Integrated Stereo Amplifier SANSUI AU 777D Solid State Amplifier 30+30 Watts RMS Vintage 1969 WORK Good Look

Original From Japan Market on 100 volts, but

For buyers Europe users We send for Free External Transformer for Working on 220/240 volts 50hz and 60hz

Refurbished, Perfect technical and aesthetic condition

SANSUI AU-777D

¥ 59.500 (lanzado en junio de 1969)

This is a pre-main amplifier that has been upgraded by focusing all efforts on the quality of sound itself without changing the circuit structure by adding partial improvement to the AU 777.

The main amplifier section uses a quasi complimentary service Darlington circuit.

All amplifier circuits from the first stage to the final output stage are composed of NF amplifiers to improve frequency characteristics, distortion and S/N, and all stages are composed of silicon transistors.

The preamp section and main amplifier section can be separated and used independently.

Equipped with T. T. C. (Triple Tone Control) which adds Midrange to Bass and Treble.

This allows for more accurate program and acoustic compensation.

A stereo balance check circuit is provided to make it easy to adjust the right and left balance accurately.

By turning the switch down to the test while listening to the monaural signal, you can easily and accurately adjust the balance without any sound if it is balanced properly.

SANSUI's original pure electronic PSC circuit is used to prevent damage to the power transistor even if the output terminal is accidentally short-circuited.

In addition, a power transistor is combined with a short-cut fuse to ensure safety.

It has a center channel output jack and two circuits, a flat output and a 159 Hz high-cut output, so you can enjoy 3 d stereo by connecting a mono amplifier and woofer.

The power transistor is spread over the 3 mm aluminum extrusion back panel to increase the heat radiation effect, so that it can withstand a long performance with a margin.

Equipped with low filter, high filter, loudness, tape monitor circuit, headphone jack, muting switch, etc.

Type Solid state / pre-main amplifier

Main Amplifier Section

Rated output Music Power (IHF) : 70W ± 1 db (8 Ω)

Effective output : 30W/30W ± 1 dB (8 Ω)

Total harmonic distortion factor Not more than 0.5%

Intermodulation distortion factor (60 hz : 7 khz = 4 : 1) Not more than 0.8%

Power Band With (IHF) 20 Hz ~ 50000 Hz (Distortion Factor 0.5%)

Frequency characteristic 20 Hz to 100,000 Hz, ± 1 db

Channel separation 20 dB or More (1000 Hz)

Hum and noise (IHF) 100 dB or more (closed circuit)

Input Sensitivity / Impedance 1V/300k Ω (Rated Output, 1 kHz)

Damping factor 15 (8 Ω)

Load impedance 4 Ω ~ 16 Ω

Center channel output voltage Flat Output : 10 V (1 kHz)

High-Cut Output (fo = 159 Hz) : 10 V (50 Hz)

Preamplifier Section

Output voltage Maximum output voltage : 4 V

Rated output voltage : 1 V

Total harmonic distortion factor 0.1% (Rated Output Voltage)

Frequency characteristic 20 Hz to 70,000 Hz, + 0.5 -1.5 dB

Hum and noise (IHF, maximum output voltage) Phono1, 2 : 80 dB or more (closed circuit)

MIC : 85 dB or more (closed circuit)

Tuner : 85 dB or higher (open circuit)

AUX : 85 dB or more (open circuit)

Input Sensitivity / Impedance

(Rated Output Voltage, 1 kHz) Phono1 : 2 mV ± 3dB/50k Ω

Phono2 : 2 mV ± 3dB/30k Ω, 50k Ω, 100k Ω

MIC : 3.5 mv ± 3dB/50k Ω

Tuner : 140 mv ± 3dB/100k Ω

AUX : 140 mv ± 3dB/100k Ω

Tape Mon (Pin) : 140 mv ± 3dB/100k Ω

Tape Recorder (Din) : 140 mv ± 3dB/100k Ω

Recorded output Tape Rec (Pin) : 150 mv ± 3 db

Tape Recorder (Din) : 30 mv ± 3 db

Controls Bass : 20 Hz ± 15 dB (in 3 dB steps)

Midrange : 1,500 Hz ± 5 dB (in 1 dB steps)

Treble : 20,000 Hz ± 15 dB (in 3 dB steps)

Loudness (volume -30dB) : 50 Hz + 8 dB, 10,000 Hz + 2.5 dB

SWITCH High Filter : 20,000 Hz, -18dB (12dB/oct.)

Low Filter : 20 Hz, -26dB (12dB/oct.)

Muting : -20dB

<General>

Configuration 31 tr, 5 di

Power supply voltage 100 V, 50Hz/60Hz

External dimensions Width 435x Height 155x Depth 334 mm

Weight 12.5kg

Sold Separately Walnut wood case (¥ 4,150)

The Sansui AU-777D is a solid-state stereo integrated amplifier released in June 1969. (audio-database.com)

Technical Specifications:

• Output Power: 30 watts per channel into 8Ω (stereo).

• Frequency Response: 20 Hz to 100 kHz.

• Total Harmonic Distortion: 0.5%.

• Damping Factor: 15.

• Input Sensitivity: 3.5 mV (microphone), 2.2 mV (MM), 140 mV (DIN), 140 mV (line).

• Signal-to-Noise Ratio: 85 dB (microphone), 80 dB (MM), 85 dB (line).

• Speaker Load Impedance: 4Ω to 16Ω.

• Dimensions: 435 x 155 x 334 mm.

• Weight: 12.5 kg.

(hifiengine.com)

Positive Reviews:

One user highlights:

“What a great integrated amp from the ‘60s. […] Sounds great for something this old. Sansui engineers were building future-proof technology. The classic design, the craftsmanship, it’s all here. It will look better than your Bluetooth speaker setup. It will sound a million times better than your Marshall or JBL speakers. Come on, folks, get back to the classics! Ditch this wireless Bluetooth era nonsense. If you want real music, use REAL equipment!”

(hifiengine.com)

Another user mentions:

“The AU-777D had more warmth and feel than any solid-state amp in the…”

(audiokarma.org)

These comments emphasize the sound quality, classic design, and durability of the Sansui AU-777D—features that continue to impress audiophiles even decades after its release.