I asked this in the chip amp section but it may be more appropriate here. Can anyone tell me if this amp is bad based on what I describe? Or ask more specifics from me on it? Is it possible that I've overlooked something obvious in setting it up?
Finished Board New TPA3123 2 1 Digital Power Amplifier Board Subwoofer Output | eBay
Came last week. Finally got around to bench testing it. Used a 15vdc 3amp Toshiba SMPS. The mains are 3.5inch Vifa 8ohms and "sub" is a 4inch Dayton Neo woofer. Music input from a preamp. Checked, double checked, polarities with DMM.
Turned on the music, plugged in the power supply, and nothing. Just a steady approx 3 beat per second low volume "blip" coming out of the main speakers. Nothing out of the woofer. Volume, treble, and bass level controls have no affect whatsoever.
I swapped the power supply for a 19vdc 4amp Sony SMPS and the result was unchanged. I disconnected the signal input. No change. Same 3bps blips.
I'm well within my 15day return period and the guy's got a big store with 98.9 approval so I'm not too worried yet. But I'd like to be certain that the amp is bad before going through all the trouble to return it for another.
Finished Board New TPA3123 2 1 Digital Power Amplifier Board Subwoofer Output | eBay
Came last week. Finally got around to bench testing it. Used a 15vdc 3amp Toshiba SMPS. The mains are 3.5inch Vifa 8ohms and "sub" is a 4inch Dayton Neo woofer. Music input from a preamp. Checked, double checked, polarities with DMM.
Turned on the music, plugged in the power supply, and nothing. Just a steady approx 3 beat per second low volume "blip" coming out of the main speakers. Nothing out of the woofer. Volume, treble, and bass level controls have no affect whatsoever.
I swapped the power supply for a 19vdc 4amp Sony SMPS and the result was unchanged. I disconnected the signal input. No change. Same 3bps blips.
I'm well within my 15day return period and the guy's got a big store with 98.9 approval so I'm not too worried yet. But I'd like to be certain that the amp is bad before going through all the trouble to return it for another.