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<blockquote data-quote="alienchickenomg" data-source="post: 8361065" data-attributes="member: 661943">So guys, I currently have two ztx 5000.1&#039;s and I&#039;ve had one for a while working flawlessly, but when I installed the second I suddenly got a loud thump after my stereo started. It only came from the new amp. There is also some slight noise present but it is very faint. When I started my stereo again the amps protect light came on for about a second then it switched to green and made the noise. The two amps are connected via the preouts on each other. When I switched the RCA from my head unit to the new amp, and ran the out RCA from it to my old amp, the thump stopped. However, there is still a slight noise in my subwoofers. Both amps are grounded direct to battery and this issue only started once the second amp had its rcas plugged into the first. Could the amp be faulty or ground loop, or what?Edit: i played with the rcas a bit. The signal seems clear from either amp until they are connected to eachother. maybe bad rcas? theyre knuconcept ones. ive gotten it to where it just has a slight noise, almost like a radio interference along with a really slow heartbeat in it. It is very light, and seems to change a bit when i pause my stereo, at volume 0. increased volume seems to have no effect. This is all while the car is off btw, just key at accessory.</blockquote>

[QUOTE="alienchickenomg, post: 8361065, member: 661943"] So guys, I currently have two ztx 5000.1's and I've had one for a while working flawlessly, but when I installed the second I suddenly got a loud thump after my stereo started. It only came from the new amp. There is also some slight noise present but it is very faint. When I started my stereo again the amps protect light came on for about a second then it switched to green and made the noise. The two amps are connected via the preouts on each other. When I switched the RCA from my head unit to the new amp, and ran the out RCA from it to my old amp, the thump stopped. However, there is still a slight noise in my subwoofers. Both amps are grounded direct to battery and this issue only started once the second amp had its rcas plugged into the first. Could the amp be faulty or ground loop, or what? Edit: i played with the rcas a bit. The signal seems clear from either amp until they are connected to eachother. maybe bad rcas? theyre knuconcept ones. ive gotten it to where it just has a slight noise, almost like a radio interference along with a really slow heartbeat in it. It is very light, and seems to change a bit when i pause my stereo, at volume 0. increased volume seems to have no effect. This is all while the car is off btw, just key at accessory. [/QUOTE]

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