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Amp flickering on and off
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<blockquote data-quote="hatedonmostly" data-source="post: 6950843" data-attributes="member: 611322"><p>updatez</p><p></p><p>Amp has been giving me problems still, a few days ago I got the bright idea to check the voltage at the amp with a DMM when it was flickering. Read 8.20v. I figured, I've saw something similar to this problem before, when the inline fuse blew on the power wire going to my Hifonics. The LEDs on the amp lit up dimly, but it wouldn't turn on. Although the fuse looked fine, it was actually blown, and that was the root of my problems.</p><p></p><p>So I replaced the 100A fuse with another 100A. The 4 gauge Knu KLMX cable is only rated at 100A, although my AQ1200D is fused at 120A. Amps never pull their max fused rating, so I thought this wouldn't be a problem, and it never was. Until recently, of course. That 100A fuse blew in a day.</p><p></p><p>The 4 gauge KLMX is rated at 100A in a 20 ft. run, so I figured that the fuse was my limiting factor in the install. I have a very short run of the 4 gauge going to the amp, so I figured that it wouldn't be an issue if I put a bigger fuse in; if anything, it would blow the fuses in the amp first. Put in a 150A fuse, worked for a week until the amp starts doing it again.</p><p></p><p>So tonight, I pull out the DMM and start checking things. Everything checks out except for the voltage on the sub amp, which is reading 8.2 again. Even the other amp, which is connected to the same distro is fine. So I check the fused distro, which is a 1/0 in, 4 and 8 gauge out. Everything is fine before the power is distributed, at the 8 gauge out it's fine, and at the 4 gauge out it's 8.2 again. Sounds like a fuse problem again, but by accident I touch my hand to the metal of the distro that the 4 gauge goes to, and it's so hot it burns my hand.</p><p></p><p>So what's the virdict? Can you burn up a distro block, or can they go bad? Or could it be a poor connection? I realize now that the connection between the 4 gauge wire and the distro wasn't great, and it makes sense that the amp could have tried to pull too much current because it wasn't getting enough to output it's rated power like it should, and when it pulled that extra power it blew the fuse; even with the bigger 150 amp fuse, it may have tried to pull that much power to do it's rated power.</p><p></p><p>Holy **** that is long. <strong>tl;dr edit: Fused distro is getting hot as balls, could it be that the distro went bad or burned up, or is it just a poor connection?</strong> I've heard that poor connections on amps or fuse blocks can cause them to melt, so I'm leaning toward the second one...</p></blockquote><p></p>
[QUOTE="hatedonmostly, post: 6950843, member: 611322"] updatez Amp has been giving me problems still, a few days ago I got the bright idea to check the voltage at the amp with a DMM when it was flickering. Read 8.20v. I figured, I've saw something similar to this problem before, when the inline fuse blew on the power wire going to my Hifonics. The LEDs on the amp lit up dimly, but it wouldn't turn on. Although the fuse looked fine, it was actually blown, and that was the root of my problems. So I replaced the 100A fuse with another 100A. The 4 gauge Knu KLMX cable is only rated at 100A, although my AQ1200D is fused at 120A. Amps never pull their max fused rating, so I thought this wouldn't be a problem, and it never was. Until recently, of course. That 100A fuse blew in a day. The 4 gauge KLMX is rated at 100A in a 20 ft. run, so I figured that the fuse was my limiting factor in the install. I have a very short run of the 4 gauge going to the amp, so I figured that it wouldn't be an issue if I put a bigger fuse in; if anything, it would blow the fuses in the amp first. Put in a 150A fuse, worked for a week until the amp starts doing it again. So tonight, I pull out the DMM and start checking things. Everything checks out except for the voltage on the sub amp, which is reading 8.2 again. Even the other amp, which is connected to the same distro is fine. So I check the fused distro, which is a 1/0 in, 4 and 8 gauge out. Everything is fine before the power is distributed, at the 8 gauge out it's fine, and at the 4 gauge out it's 8.2 again. Sounds like a fuse problem again, but by accident I touch my hand to the metal of the distro that the 4 gauge goes to, and it's so hot it burns my hand. So what's the virdict? Can you burn up a distro block, or can they go bad? Or could it be a poor connection? I realize now that the connection between the 4 gauge wire and the distro wasn't great, and it makes sense that the amp could have tried to pull too much current because it wasn't getting enough to output it's rated power like it should, and when it pulled that extra power it blew the fuse; even with the bigger 150 amp fuse, it may have tried to pull that much power to do it's rated power. Holy **** that is long. [B]tl;dr edit: Fused distro is getting hot as balls, could it be that the distro went bad or burned up, or is it just a poor connection?[/B] I've heard that poor connections on amps or fuse blocks can cause them to melt, so I'm leaning toward the second one... [/QUOTE]
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