1ohm, yea when i go full tilt, ive seen voltages as bad of 10.9 while the song is hitting.. thats so bad,, resting it sits at like 13.7-14.9 after playing but after too much bumping i go way tooo far down that i cant even play the amp.. not to mention the amp's gain is at 25%. Im sure even if the gains were set properly it would be higher. AHHH this is the worst problem to have.