i'm having troubler with tis amp, it cut off after i on it for like 20 sec or so n the amp feels hot, i'm only loading 1 woofer which is a mtx thunder 8000, using 4 gauge power cable with 150amp fuse for it...any idea.....btw, how old is tis amp? wat year made? got it from my brother tat's i hav no idea at all