Note! That thing only worked when you left the amp on and plugged the cable into the back of it to turn it on! What a train wreck. Thanks for picking the wound, Jason.
I've actually found the unit to work properly if...
1. leave the dongle plugged into the amp at all times
2. never turn the amps power switch off
3. when you want to power the amp on plug the battery power cable into the back side of the dongle.
this allows the soft start to function properly and protect the amplifier.
sorry but this is the only full proof (almost full proof) way to run batteries on one of our older amps.
NOTE: if you have a sensation you do not need a soft start of any kind because it is built into your amp.