But my ancient Radio Shack STA-155 amp developed an intermittent drop-out on the right channel, so I decided to give this little guy a shot

The right channel only plays static

While the amp is on, the left channel makes a much louder buzzing noise than the right channel

Right channel had static out of box, volume potentiometer broke within minutes of use

The right channel only plays static

sound breaks up as you turn up the volume.