Audio Database

The

SANSUI AU-7500
75,900yen(around the 1973 time)

Description
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The Integrated Amplifier which pursued the height of the completeness which throws in the newest circuitry technology and the very best part, and is not a foregone conclusion.

The whole page hardwired-connection OCL pure complementary circuit is adopted as a power amplifier part.
Moreover, the stabilization is attained in +-2 power circuit by the large-sized transformer and the mass capacitor of 6,800 micro Fx2.

The 3 steps of PNP-NPN-PNP hardwired-connection circuitry is adopted as an equalizer circuitry, and the low-noise and the large dynamic range are realized.

The relay was combined with a transistor and diode, and also the circuitry which used four immediate judgment fuses together is adopted as a protection network.

The triple tone control for low, inside, and loud sounds is adopted.

Two Phono inputs are carried and an impedance change is possible for Phono2.

4ch adapter termination is carried.

It is an enable independently about a pre part and a main part.

The mode selector of five positions is carried and the change of Stereo/Reverse/Normal/Mono L+R/L/R is possible.

The muting, the loudness, and a row / high filter are carried.

Rear

Rating of a mode
Form Integrated Amplifier
Effective output
Both channel operation 20Hz-20kHz:32W+32W (8ohm)
1kHz: 40W+40W (8ohm)
One-side-channel operation 1kHz:43W/43W (8ohm)
Music power 150W (4 ohms, 1kHz)
THD (at the time of an Output power) Main Amp: 0.1% or less
Cross modulation distortion Main Amp: 0.1% or less (70Hz:7kHz=4:1, SMPTE)
Power Band Width (IHF) 5Hz - 40kHz (8 ohm, one-side-channel operation)
Frequency characteristic (at the time of 1W output) Phono1, 2:30Hz-15kHz}0.5dB (RIAA deflection)
Aux: 10Hz-30kHz}1.0dB
Main Amp: 10Hz-50kHz}1.0dB
Dumping factor 40 (8ohm)
Input sensitivity/impedance
(1kHz)
Phono1:2.5mV/50kohm
Phono2:2.5mV/30kohm, 50kohm, 100kohm
MIC: 2.5mV / 50kohm
Tuner, Aux, 4ch adaptor, and Tape monitor(Pin/Din):100mV /, 50kohm
Main Amp: 800mV / 40kohm
Phono maximum permissible input 300mV (less than THD 0.5%)
Output voltage (1kHz) Tape Rec(Pin/Din):100mV/30mV
4ch Adaptor:100mV
Pre Amp: 0.8V (less than THD 0.08%)
4.0V (a maxima and less than THD 0.5%)
A hum and a noise (IHF) Phono1, 2:75dB or more
Tuner, AUX: 80dB or more
Main Amp: 100dB or more
Tone control Bass: }15dB (50Hz)
Midrange:}5dB (1.5kHz)
Treble: }15dB (15kHz)
Loudness (Volume-30dB o'clock) + 10dB (50Hz) and +10dB (15kHz)
A low filter - 12dB (50Hz, 12 dB/oct)
A high filter - 11dB (10kHz, 12 dB/oct)
Muting -20dB
Power dissipation (maxima) 100W(315VA)
Dimensions Width 440x height 140x depth of 322mm
Weight 12.7kg