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<blockquote data-quote="dB-r" data-source="post: 2922735" data-attributes="member: 574699">Its more likely that either inside your radio, where the RCA&#039;s connect to the PCB, there is a bad solder, or same thing with your amp, but since you looked over it good it may be in the radio.&nbsp;&nbsp; Usually the connection breaks in the amps though, not the radio.&nbsp;&nbsp; It will look like a little ring around the pin of the connection.Although you may not always be able to see it, for instance, I just repaired a JBL GTS600 that had 2 fuse holders, and one of them had broken connection to the PCB, but the solder was fine, the leg coming from the Fuse holder had broken right off above the PCB, it was invisible to the eye, I had to use my DMM on continuity test to see that there was no electrical connection there.&nbsp; I repaired it with some desoldering braid.The RCA shield is supposed to be a zero volt reference for the input signal, if grounded to chassis ground, you may have some problems down the line with noise, or distortion of the input signal.</blockquote>

[QUOTE="dB-r, post: 2922735, member: 574699"] Its more likely that either inside your radio, where the RCA's connect to the PCB, there is a bad solder, or same thing with your amp, but since you looked over it good it may be in the radio. Usually the connection breaks in the amps though, not the radio. It will look like a little ring around the pin of the connection. Although you may not always be able to see it, for instance, I just repaired a JBL GTS600 that had 2 fuse holders, and one of them had broken connection to the PCB, but the solder was fine, the leg coming from the Fuse holder had broken right off above the PCB, it was invisible to the eye, I had to use my DMM on continuity test to see that there was no electrical connection there. I repaired it with some desoldering braid. The RCA shield is supposed to be a zero volt reference for the input signal, if grounded to chassis ground, you may have some problems down the line with noise, or distortion of the input signal. [/QUOTE]

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