found out on the other forum. real easy to do with the 1501D. "Modding it is pretty easy if you're familiar with removing circuits with a soldering iron. You have to remove resistor Q240 from the board and release the compression circuit." "q 240 is located in the south west quadrant of the amp... you have to be careful to not remove d240 that is right beside it. Also, the compression circuit is a little white button next to the rca end of the amp. It needs to be pushed in the "out" position. " "They dont do it from the factory because the chip you remove is the part of the protection circuitry that shuts the amp down if it see's a load below 2 ohms (ie dead short) so when modded you have to be careful not to touch the speaker leads together while the amp is on, or you will short it out. And yes, the mod will allow up to 18.5 dc volts and down as low as you feel comfortable on impedance... I wouldnt suggest any lower than .5 for daily. "
