I have 2 of these amps and traced down the circuitry. they contain all the overvoltage, undervoltage, temperature and dc protections mentioned in the IRaud7 design.
main problem is running them at too high a voltage , the output inductor will run hot. guess 55Vdcd is max. thinking of replacing the inductor by a gapped ferrite from ferroxcube or t106-2 . sometimes these classD boards are shippped with polyester caps in the output filter (MKT), replace them with MKP .
connector is XH3 from JST or similar 0.1" pitch.
main problem is running them at too high a voltage , the output inductor will run hot. guess 55Vdcd is max. thinking of replacing the inductor by a gapped ferrite from ferroxcube or t106-2 . sometimes these classD boards are shippped with polyester caps in the output filter (MKT), replace them with MKP .
connector is XH3 from JST or similar 0.1" pitch.
I use t106-2 inductor too and it runs quite cool.
Be careful with output filter. If you run it without a speaker connected it can blow output capacitor. I always use a 250VDC output capacitor.
Hello Troy,
have the same Kit bought from Aliexpress for USD14.48, I am operating the same with 40 - 0 - 40 VAC & Amp transformer, with DC rail of 37600MFD each-+.
For audio input I got the cable from old CD rom and the center pin is ground.
The performance of the amp is great in 10" 8 Ohms speaker.
have the same Kit bought from Aliexpress for USD14.48, I am operating the same with 40 - 0 - 40 VAC & Amp transformer, with DC rail of 37600MFD each-+.
For audio input I got the cable from old CD rom and the center pin is ground.
The performance of the amp is great in 10" 8 Ohms speaker.
the two audio pins are common (short) can give the audio signal on any one of them or on both it will work, the center pin is ground.
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