I came here to look for an answer to this exact problem (I am also using a pair of Nobsound USB amps). Although for me it's not every time, but occasi...

Ha! Ignore me, I just connected the shaker simply to channel 1 & 2 on the amp and it's working like a charm, so no need for bridging or any other ...

@admin5435 In this case though the amplifier input is USB direct from the PC. There are no RCA inputs on the amp, so I'm not sure how to get full po...

@admin5435 I'm using one of the Nobsound USB stereo amps /p> It's connected to the PC via USB (so it shows effectively as an additional soundcard)...

@admin5435 Thanks! So in my case, where I'm using a stereo amp bridged to the mono shaker I would just set channels 1 & 2 "on" for eac...