SKU145225 - TDA7492 Class D amplifier board measurement - China reviews

A case study in out-of-band noise and QA issues, this $9,35 Banggood amp module is pretty crap. We take a look at the construction of the output filter, and modify it in order to actually work properly.

Performance figures (SPOILERS):

Test conditions: 26 V supply, 10 Hz-30 kHz bandwidth limit
Noise floor: -64 dBV unweighted
Power output into 8 Ohm
@ 0,1 % THD+N 20 W/ch.
@ 1 % THD+N: 35 W/ch.
Damping factor: 34
Frequency response: 10 Hz - 23 kHz +0,8/-0,2 dB
Gain: 33,4 dB
Temperature protection: Yes

Note that amplifier board ARRIVED BROKEN and needed repair before being safe to use. Soldering quality is very poor. Screw terminals are of poor quality, and their solder joints fail very easily.

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