High-output
, low-distortion circuitry
The AU-20000
is the most powerful integrated amplifier in Sansui's distinguished AU Series.
Its constant and reliable power output is a continuous 170 watts, min.RMS, per
channel, both channels driven into 8 ohms, over a 20 Hz to 20 kHz bandwidth
with no more than 0,05% Total Harmonic Distortion.
Powerful
Triple Push-Pull output circuit design
No less than
six hand-selected power transistors are used in each output channel. The triple
push-pull circuitry here is guaranteed to deliver its rated output at the
lowest possible distortion power to spare, always.
Dependable
power Supply
Particularly
close attention is paid to the power supply design to ensure dependability and
stability. The circuit is the plus-minus symmetrical voltage type, coupling a
low magnetic leakage toroidal transformer with extra large capacitors.
Dual-Amplifier
Phono equalizer with low-noise transistors
Dynamic
response is improved by the 8-transitor equalizer with differential amplifiers
at its initial stages. Distortion is totally minimized, and the dual amplifier
design - a CR type for highs and a NF type for lows achieves very accurate RIAA
equilization.
Triple Tone
Control
The
AU-20000 features Sansui's exxlusive
Triple Tone Control design, controlled by a CR type circuit. A wide dynamic
range and excellent transient response are assured by the use of a plus minus
voltage supply
Complete
Triple Protection Circuits
Damage and
breakdowns are avoided entirely with the use of a temperature sensing circuit,
a DC voltage detection circuit and an ASO (Area of Safety Operation) detection
circuit. Shorts in speaker terminals or leads, or power temperature emergencies
instantly activate these circuits for complete protection.
Selectable
phono sensitivity and Impedance
The phono
input circuitry in the AU-20000 incorporates two special selectors, each with
three positions, to allow the selection of the correct sensitivity and
impedance to obtain optimum results with any cartridge in use.
Versatile
tape monitor circuit
The AU-20000
accepts up to the stereo tape deck and provides individual monitoring and
deck-to-deck dubbing for each. It also permits source monitoring during the
dubbing process.
Other
user-oriented features
Provided
are: Tone Defeat Switch; 3-Step Audio
Muting Switch; 2-Step Low/High Filters; Mode Switch; Meter Sensitivity Switch,
and large, Self-Illuminated level Meters.
Specifications
Power Output:
170 watts
per channel into 4 and 8 Ω
85 watts per
channel into 16 ohms
Load
Impedance: 4, 8 and 16 Ω
Power
bandwidth: 20 to 20,000 Hz at or below
rated min. RMS power output and Total Harmonic Distortion
Total
Harmonic Distortion: : less than 0,05%
at or below rated min.RMS power output and Total Harmonic Distortion
Intermodulation
Distortion (70 Hz : 7 kHz = 4 : 1 SMPTE Method):
Overal (from
AUX) less than 0,05% at rated RMS power output
RIAA Curve
Deviation (Phono): +0,2 dB, -2 dB (30 to
15,000 Hz)
Channel
Separation (at rated output 1,000 Hz):
Phono 1
: better than 55 dB
Phono 2
: better than 55 dB
Tuner : better than 60 dB
Aux : better than 60 dB
Power
Amplifier : better than 100 dB
Tape Monitor
: better than 60 dB
Hum and
Noise (IHF):
Phono 1
: better than 70 dB
Phono 2
: better than 70 dB
Tuner : better than 80 dB
Aux : better than 80 dB
Power
Amplifier : better than 100 dB
Tape Monitor
: better than 80 dB
Input
Sensitivity and Impedance (1 kHz, for rated output):
Phono 1
; 1,5 mV, 3 mV, 6 mV / 30 k, 50 k, 100 k
Ω
Phono 2
: 1,5 mV, 3 mV, 6 mV / 50 k Ω
Max. Input
Capability: more than 350 mV RMS at
0,05% distortion
Tuner : 130 mV / 50 k Ω
Aux : 130 mV/ 50 k Ω
Tape
Playback 1 : 130 mV (PIN)
Tape
Playback 2 : 130 mV (PIN); 130 mV (DIN)
Tape
Playback 3 : 130 mV (PIN)
Recording
Output
Tape 1
: 130 mV (PIN)
Tape 2
: 130 mV (PIN), 30 mV (DIN)
Tape 3
: 130 mV (PIN)
Controls:
Bass : +10 dB
-10 dB at 30 Hz
Midrange
: +5 dB -5 dB at 1,500 Hz
Treble
: +10 dB
-10 dB at 20,000 Hz
Filters:
Low : -3 dB at 20 Hz (12 dB/oct); -3 dB at 40 Hz (12 dB/oct)
High : -3 dB at 7 kHz (6 dB/oct); -3 at 12 kHz (12 dB/oct)
Muting: 0 dB, -10 dB, -30 dB
Power
Requirements: 100, 120, 220, 240 V 50/60
Hz
Dimensions
(W x H x D): 460 x 178 x 400 mm
(18-1/8" x 7" x 15-3/4")
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