Matt Boggs

I had this running a single focal 33v2 13" sub in a sealed enclosure. Using a voltmeter and a 50hz test tone on a cd is a must! I did this and the amp performed as it should! perfect! you can get the test tone on realmofexcursion.com and burn it to a disc. a simple ac voltmeter will allow you to dial this amp in to the perfect setting. complete instructions on how to do this are provided in the manual. I have since upgraded to the 500/1 which is just as easily dialed in with a cd and voltmeter. these are truly overbuilt exceptional pieces of equipment. If you've been unsure about getting a 250/1 or 500/1 trust me, they are worth every penny.