Help! Kicker ZX1500.1 now playing 1/2 volume

[akheathen Premium Member]

umm......, yes, actually, you should use a dmm to check the voltage at the amp. turn it on and let it idle(no music playing.) compare the power at the amp terminals with the power at the battery. move the positive probe from the positive cable in, to the remote in. it should be pretty much the same. if you find more than minor discrepancy, then you have a bad connection there. if not, do the same with it playing. also, make the same comparison between the terminals, and both sides of the fuse. there should not be a voltage drop. finally, measure your sub resistance, could have lost connection to a coil, or even pushed one over the edge with your new adjustments. check the ac output voltage....... good stuff to start with there.... oh, and you can rule out rca problems( which are likely from movement, if present) by using a 3.5mm headphone jack-to-rca cord and a portable player and see what it does.

 

[infowarrior45 10+ year member]

Well, unfortunately, we found out it was the amp. Hooked everything up again and it worked like a charm for the first 5 minutes. After that it got quiet. My buddy then started to adjust the ground cable...after that it shutdown. When I turned the radio back on, the amp....smoked!

Looks like it smoked a couple of the output transistors? Here are the pics of the visible damage :

Fried Output Transistors?

Cracked Output Transistor?

 

[SourDeez 10+ year member]

Well, unfortunately, we found out it was the amp. Hooked everything up again and it worked like a charm for the first 5 minutes. After that it got quiet. My buddy then started to adjust the ground cable...after that it shutdown. When I turned the radio back on, the amp....smoked!
Looks like it smoked a couple of the output transistors? Here are the pics of the visible damage :

Fried Output Transistors?

Cracked Output Transistor?

Ouch bro.. sorry to hear that..

 

[infowarrior45 10+ year member]

Yah...couldn't believe it. Hoping I can repair it myself...just check some readings with a DMM and put new transistors in.

 

[Dirtrider4eva 10+ year member]

Low pass filter on to high? Whst happened to me.. When I siwtched master - slave amps my lpf was on. Sub wss supposed to get 2.5k, but wouldnt hit hard, but sounded.great

 

[akheathen Premium Member]

more pics please. you are going to want to replace all of them as a set, and those smd resistors, and hope the drivers are good..... it actually looks like the power supply fets (irf3205's) the outputs should be running 1/8-1/4 watt wire-wound resistors. in this case, you want to check the outputs as well for shorting.