I've just finished building the kit and I haven't connected it yet to speakers so in fact I don't really know if it does sound or not. However, the amp shows a couple of weird behaviours:
- Idle input voltage at one output is around 46 mV while the other one is around 86 mV
- VREF is around 1.04 volts (pin4 of the chip to ground), lower than expected. The weirdest thing is that if I probe VREF while the amp is not connected to an input (but connected to power) after probing it the VREF goes to 0 and the speaker outputs voltage goes to 12V (power supply voltage). This doesn't seem to happen if the amp is connected to an input, keeping VREF stable at 1.04V.
Is anything clearly wrong? Is it safe to plug some speakers? I wouldn't like to blew them up.
Thanks in advance,
PS: My electronics knowledge is pretty limited.