SP-991 PLUS Class A Mono Power Amplifier

 

The SP 991 is a power amplifier in monophonic design. This was necessary because of the already tremendous weight of 30 kg for each mono-block. The circuitry's layout is balanced. Each mono-block can be driven via either balanced XLR connectors or unbalanced RCA jacks.

The heart of each block consists of a toroidal core transformer of 1,500 W, 120,000 µF energy storage capacity and 24 power transistors from TOSHIBA.

 
Specifications

System/Format: Class A Mono Power Amplifier
Frequency Range: 10 Hz - 20 kHz +/- 0.5 dB
Nominal Output Power: 100 Watts Class A into 8 Ohm
300 Watts RMS into 8 Ohm
600 Watts RMS into 4 Ohm
Total Harmonic Distortion: < 0.1 % max. (1 kHz, 1 Watt)
Input Sensitivity: 2 V
Signal-to-Noise Ratio: > 95 dB
Input Impedance: 47 kOhm
Inputs: 1 x RCA, 1 x XLR
Outputs: 2 x 2 speaker terminals
Mains Power Input: 230 V / 50 Hz
Dimensions (W x H x D): 430 x 180 x 530 mm
Weight: 30 kg
Colour/Finish: black / silver