The amplifier circuit is symmetrical, the input stage is made on a single-channel op-amp.
The amplifier is assembled on 2 pairs of output transistors 2SA1943 and 2SC5200 TOSHIBA
When using 8 ohm acoustics, the supply voltage can be raised to 55-60V to obtain the equivalent power at 4 ohms.
The module does not require any configuration and is ready to work out of the box. The minimum quiescent current of about 20mA makes it almost completely cold in idle mode.
For passive cooling at a supply voltage close to the maximum, a radiator of at least 1500 sq. cm is required
Subjectively, the amplifier has a powerful, assertive sound, and is able to "handle" most speaker systems.
The module can be recommended to work on a subwoofer speaker or on powerful acoustics of the initial and middle level.
| Measurements | |
| Supply voltage bipolar | -52V...0...+52V |
| Load resistance | 4 Ohm |
| Power maximum, W | 227 |
| Testing power, W | 150 |
| Quiescent current | 20mA |
| Frequency response (from 40 Hz to 15 kHz), dB | +0.23, -0.59 |
| Noise level, dB (A) | -107,4 |
| Dynamic range, dB (A) | 107,3 |
| THD, % | 0,0650 |
| THD + Noise, dB (A) | -66,0 |
| IMD + Noise, % | 0,0150 |
| IMD at 10 kHz, % | 0,0840 |
| Measurement Page |
|
| General characteristics | |
| Amplifier class | AB |
| Maximum supply voltage (bipolar / constant) DC | 50V |
| Minimum supply voltage (bipolar / constant) DC | 25V |
| Module size LxWxH, mm | 65x100x30 |
| Number of channels | mono |
| Output transistors | 2SA1943/2SC5200 |
| Weight, kg | 0,120 |
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