I was quite excited when my new Topping PA5 showed up today. I just hooked it up and immediately ran into problems with my unbalanced signals. I have Topping L30 unbalanced heaphone/pre amp, running into
1/4" TRS balanced to RCA adapters, and the effect is really strange, or the amp is actually defective.
As I rotate the volume knob on the PA5 up, the speakers independently fade in and out as the volume increases. Depending on where you stop the knob, they will either sound okay in stereo, something closer to mono, or one or both speakers will be muted. Turning it all the way up makes it go full mute. At about 3/4 or so is as far as it goes before it starts muting. I knew I would not get full volume unbalanced, but I wasn't expecting this.
Unfortunately I don't have anything with balanced audio to test it with. Does this sound like a balanced/unbalanced issue, or a bad amp?