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Performance parameters:
Output power: typical 20W (Max. 30W)
The speaker impedance: 4 8
Total harmonic distortion: < 0.04%
Signal to noise ratio: 105dB
Frequency response: 14hz100khz (maximum range calculated by RC highlow power circuit: 3.29 hz482.29 kHz)
Power supply voltage: recommended ±25V (highest voltage shall not exceed ±30V full bridge rectification of 18V is 25V)
PCB size of engineering drawing is 46.5*37.5mm