Solid State
Stereo Power Amplifier POA-1001 (1978)
Usually for
large output power amplifiers, a large number of power transistors are used in
parallel, making it difficult to bring out its characyeristics. POA-1001, for
the first time, was able to realize 100 W + 100 W by a single push-pull,
proving that good sound reproduction is an absolute condition.
To the last
stage transistor, which constitutes a decisive factor in the performance of a
power amplifier, a newly developed bipolar power transistor with a collector
loss of 150 W used after making every possible improvement in the switching
characteristics. Balance drive system by 2-stage differential amplifier current
mirror circuit.
Independent
left and right power transformers, rectified circuitry, completely monaural
constitution.
Oversized
capacitor 88,000 µF and oversized heat sink.
Specifications:
Type: Silicon transistor, DC power Amplifier
Rated Output
(both channel driven):
125 W (RMS
at each channel) at 4 Ω 20 Hz - 20 kHz
100 W (RMS
at each channel) at 8 Ω 20 Hz - 20 kHz
Total
Harmonic Distortion (at rated ouput):
0,05% (20 Hz - 20 kHz)
Intermodulation
Distortion (60 Hz/7 kHz:4/1): 0,05%
Power
Bandwidth: 3 Hz - 70 kHz
Frequency
Response: 3 Hz - 100 kHz
Input
Sensitivity/Impedance: 1 V (RMS)/ 50 k Ω
Output
Impedance: 0,08 Ω
Damping
Factor: 100 (at 8 Ω)
Signal-to-Noise
Ratio: 110 dB
Low
Filter: 10 Hz (18 dB/oct)
Power
Supply
: AC 120 V 60 Hz; AC 220/240 V 50/60 Hz
Consumption
: 250 W
Dimensions
(W x H x D): 410 x 200 x 280 mm
Weight: 22 kg
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