I blew my mtx 5400d, 5 channel amp. Here's the thread with the details of my install. Only the sub channel went out on me. I thikn I may have over powered it. I wasn't getting any bass from the 4 channels from my factory amp, so I hooked a high low converter to the output of my factory sub amp (it's a little dinkly thing on the back of the factory 6 by 9 sub). It worked well for 3 weeks, now it just crapped out on me this morning. I heard a few lound thumps from the car and was like oh shi. I checekd the sub, nothing seems to be burned. I checked the amp by giving it a different input and when i touch the gain for the sub, the sub goes boom boom. I removed all inputs from the amp, and the sub still goes nuts when i touch the gain. I was wondering, how do I test how strong of a signal is comming from my sub amp. The mtx can handle 8Vrms. Can I just hook a multimeter up to the rca from the loc? Here are some details of my system: mtx 5400d amp, 270 watts rms to sub @ 2ohms, gain is set to 60%-65%, thunder eq at 85% ebc knob, was right at 50%. bass on factory taurus jbl deck, <40% bass signal feed through Install Edge (division of Rockford corp) High low converter off of sub amp, gains on loc at 40% Image Dynamics IDQ10 V2 D4 sub, wired in parallel for 2 ohms, rated 250/500 watts (rms/max) .55 cu feet sealed homemade box 12 ga pheonix gold wire Thanks in advance for any help.