So my question probably isnt limited to this specific amp, but I assume it helps to know. I basically have two questions:
1. The amp is designed for two speakers in stereo, but I want to add a subwoofer. I have a powered sub from my old theater system that I want to use, all I need is an audio signal for it, so I'm not worried about not having enough power to run it. I'm just not sure what the best way to wire it is to get both the left and right audio.
2. I have a suspicion that there may be a ground issue. Turning the volume knob makes a lot of scratching noise. Now I know that the most likely culprit is a dirty pot, and I haven't tried cleaning it yet. But since its a new pot, I just feel like thats unlikely. There also seems to be some hum, and it changes if I touch certain metal parts. It's in a wooden enclosure, is there any way I should be grounding it? Could the negative and positive leads on something be switched and causing this?
Appreciate the help.