Heres the run down... I have a Svt 450 head and Ampeg 610. I'm Using a SansAmp Bass Driver DI, DD6 and Boss Tu2 Tuner.. I noticed the other day when I had the the drive on the sansamp cranked that my Speakers would glow orangeish from behind. I had it plugged in front of the amps preamp. Should I be using the effects/return loop for this or is there something wrong with my amp? why the hell were they glowing? thanks so much.