8V will overdrive a M series amp. But, you have plenty of options... -Run the line driver at less than 8V -Change the resistors on the M amp's inputs to handle the 8V -Don't use the line driver If it were me, I would turn the gains all the way down on the M amps, hook the line driver too them, and ...

The first piece of PG equipment I bought was a 9-out-of-10 M44 I bought off of Ebay in 2009. I'm 38 and have always been into car stereo since I got my first Rabbit GTI in 1992. However, when I was really into it during and after college in the early to mid 90s, I could never afford good equipment l...