DC Stereo Power Amplifier
A high-efficiency power amplifier capable of unmistakably "full-sized" performance, the SA-P50 puts out a muscular 50 Watts per channel into 8 ohms, form 20 to 20,000 Hz, both channels driven, with no more than 0,03% Total Harmonic Distortion .
Coupling capacitors, a cause of phase distortion in the amplifier's negative feedback loop, have been eliminated. An FET in the first output stage and dual transistors in the second stage combine to form a 2-stage differential configuration having low distortion and superb temperature stability characteristics. Super linear transistors (SLPT) with an ultra high-speed frequency cut-off and ring emitter transistors in the final stage make up a pure complementary SEPP OCL circuit with exciting, low distortion reproduction at any output level. For stable power regulation essential for reproduction of dynamic musical passages, power supply is composed of a high-efficiency toroidal power transformer and two large capacity 15,00 µF electrolytic capacitors. A newly developed IC and relay function to suppress "pop" noises during On/Off switching; the self-resetting protection circuit also protects the power transistors from shorts in the output and speakers are isolated if potentially damaging DC is detected at speaker output terminals.
Features:
LED Power On indicator
9-point logarithmic peak power LED indicator (0,1 - 100 Watts)
A/B speaker system selector
Stereo headphone jack
One-touch speaker connection terminals
Specifications
Power Output: 50 watts per channel, Min. RMS at 8 Ω , from 20 Hz - 20 kHz, with no more than 0,03% T.H.D.
Total Harmonic Distortion : 0,01% ( 50 W, 8 Ω , 1 kHz)
Intermodulation Distortion: 0,01% (50 W, * Ω , 1 kHz)
Power Bandwidth: 10 Hz - 50 kHz (T.H.D. 0,05%)
Damping Factor: 40 at 1 kHz
Frequency Response: 10 Hz - 100 kHz (-3 dB)
Signal-to-Noise Ratio: 112 dB
Input Sensitivity/Impedance: 800 mV/ 47 k Ω
Output Terminals:
Speaker : A/B (8 - 16 Ω ); A + B (16 Ω )
Headphone : 1 mW/1W, 8 Ω
Dimensions (W x H x D): 250 x 71 x 247,5 mm (9-7/8" x 2-13/16" x 9-3/4")
Weight: 5,4 kg (11,9 lbs)
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