SANSUI AU-6500

Commentary

A pre-main amplifier with substantial basic performance and practical functions.

The power amplifier section is a pure complimentary service circuit directly connected to all stages by symmetrically combining PNP-NPN power transistors, and realizes low distortion.
The power supply is equipped with a large transformer and a 6,800 μ Fx2 capacitor.

The equalizer circuit uses a combination of low-noise transistors and PNP-NPN-PNP to achieve low noise and wide dynamic range.

The protective circuit is a combination of a transistor, a diode and a relay, and is also equipped with a short-cut fuse to ensure safety.

Equipped with tone control, loudness, muting circuit and low / high filter.

Equipped with a 4-channel adapter terminal.

Model Rating

Type	Pre-main amplifier
Effective power	Both channel operation 20 Hz ~ 20 kHz : 28W + 28W (8 Ω) 1 kHz : 30W + 30W (8 Ω) Single channel operation 1 kHz : 32W/32W (8 Ω)
Music power	94W (4 Ω, 1 kHz)
Total harmonic distortion factor (at rated output)	Main Amp : 0.1% or less
Cross modulation distortion factor	Main Amp : 0.1% or less (70 Hz : 7 kHz = 4 : 1, SMPTE)
Power Band With (IHF)	5 Hz ~ 40 kHz (8 Ω, single-channel operation)
Frequency response (at 1W output)	Phono1, 2 : 30 Hz to 15 kHz ± 0.5 dB (RIAA deviation) Aux : 10 Hz to 30 kHz ± 1.0 dB Main Amp : 10 Hz to 40 kHz ± 1.0 dB
Damping factor	40 (8 Ω)
Input Sensitivity / Impedance (1kHz)	Phono1 : 2.5mV/50k Ω Phono2 : 2.5mV/50k Ω Tuner, Aux, 4 ch adaptor, Tape monitor (pin/din) : 100mV/50k Ω Main Amp : 800mV/40k Ω
Phono maximum allowable input	300 mV (THD 0.5% or less)
Output Voltage (1 kHz)	Tape Rec(Pin/Din):100mV/30mV 4ch Adaptor:100mV Pre Amp: 0.8 V (THD 0.08% or less) 4.0 V (maximum, THD 0.5% or less)
Hum and noise (IHF)	Phono1, 2 : 70 dB or more Tuner, AUX : 80 dB or higher Main Amp : 100 dB or higher
Tone control	Bass : ± 15 dB (50 Hz) Treble : ± 15 dB (15 kHz)
Loudness (at Volume -30dB)	+ 10 dB (50 Hz), + 8 dB (15 kHz)
Low filter	-12dB (50 Hz, 6dB/oct.)
High filter	-12dB (10 kHz, 6dB/oct.)
Muting	-20dB
Rated power consumption (maximum)	65W(125VA)
External dimensions	Width 440x Height 140x Depth 322 mm
Weight	11.5kg