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Car Audio Equipment
Amplifiers
From good to bad : amp swap
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<blockquote data-quote="eas" data-source="post: 7326374" data-attributes="member: 633175"><p>ok, so spent the past hour or so troubleshooting this.</p><p></p><p>Before I turned the ignition on I did a test, no noise. I did a 4 channel balance/fader test just to be sure all was good there. I found that the signal into the front left speaker was quite weak compared to the front right. First thing I did was reverse the left + right speaker cable on the amp, the problem followed the cable to the right front speaker...problem in the speaker cable connection to the amp?! Unhooked &amp; rehooked the cable several times, the problem was not with the connection on the amp side. So, I gave up on that problem &amp; moved onto the bigger problem, the engine whine.</p><p></p><p>Starting with the earth, found a solid place for the cable and dremeled the paint clean off. Tested, nope..still loads of engine whine. BUT....I noticed it was mostly (or all) coming from the bum speaker I tried to fix earlier. Went to the amp and unhooked the speaker. Bingo, clean signal in the rest of the system.</p><p></p><p>So, the speaker cable is what's causing the problem &amp; it seems it's only to one speaker. Now, as much as I hate to admit it, I think I'm probably a victim if my own lazyness....I may or may not have been as carfull as I should have been while hooking the new speaker cables to the OEM lines. When will I ever learn....</p><p></p><p>2 possibilites as see them are</p><p></p><p>1) as stated above, it's behind the head unit</p><p></p><p>2) the cable has become damaged somewhere between the amp &amp; head unit.</p><p></p><p>Any other theories ?</p><p></p><p>I'm still confused as to why this did'nt seems to cause issues with my other amp?!?</p><p></p><p>thanks for help above.</p><p></p><p>Cheers</p></blockquote><p></p>
[QUOTE="eas, post: 7326374, member: 633175"] ok, so spent the past hour or so troubleshooting this. Before I turned the ignition on I did a test, no noise. I did a 4 channel balance/fader test just to be sure all was good there. I found that the signal into the front left speaker was quite weak compared to the front right. First thing I did was reverse the left + right speaker cable on the amp, the problem followed the cable to the right front speaker...problem in the speaker cable connection to the amp?! Unhooked & rehooked the cable several times, the problem was not with the connection on the amp side. So, I gave up on that problem & moved onto the bigger problem, the engine whine. Starting with the earth, found a solid place for the cable and dremeled the paint clean off. Tested, nope..still loads of engine whine. BUT....I noticed it was mostly (or all) coming from the bum speaker I tried to fix earlier. Went to the amp and unhooked the speaker. Bingo, clean signal in the rest of the system. So, the speaker cable is what's causing the problem & it seems it's only to one speaker. Now, as much as I hate to admit it, I think I'm probably a victim if my own lazyness....I may or may not have been as carfull as I should have been while hooking the new speaker cables to the OEM lines. When will I ever learn.... 2 possibilites as see them are 1) as stated above, it's behind the head unit 2) the cable has become damaged somewhere between the amp & head unit. Any other theories ? I'm still confused as to why this did'nt seems to cause issues with my other amp?!? thanks for help above. Cheers [/QUOTE]
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From good to bad : amp swap
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