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Evo VIII install
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<blockquote data-quote="AWD PSI" data-source="post: 7092867" data-attributes="member: 625722"><p>I ran into a few issues with the whole sub side of the setup. I connected everything and powered up the sub amp...then nothing. After two hours of checking rca cables, pulling the amp (without removing the seat) and rechecking all connections I hit the reset button on the h/u and bingo...some sound...very little though, had to put the sub volume to +8 (out of 8) to even tell its there. I wanted a subtle low end but this is ridiculous.</p><p></p><p>Come to find out my main pre outs front and rear are 5 volts and my sub out is 2 volts. I haven't messed with the gain yet, I just found out this info, not sure yet how if at all this is affecting my low output. I didn't know pre outs had rated voltage or that it matters.</p><p></p><p>My other problem is with the cross overs. The amp and h/u both have cross overs that are always on. It's my understanding to only use one but in this case I can't. The LPF on the amp is adjustable from 50-200Hz and my h/u has a selectable one, 55Hz, 85Hz, 125Hz. My thought is to turn up the amp to 200Hz and then use the h/u to do 85Hz. I read somewhere about cross overs introducing phase shift and causing problems when doubled up. I have no idea what that means, yet. Am I screwed with these two crossovers?</p></blockquote><p></p>
[QUOTE="AWD PSI, post: 7092867, member: 625722"] I ran into a few issues with the whole sub side of the setup. I connected everything and powered up the sub amp...then nothing. After two hours of checking rca cables, pulling the amp (without removing the seat) and rechecking all connections I hit the reset button on the h/u and bingo...some sound...very little though, had to put the sub volume to +8 (out of 8) to even tell its there. I wanted a subtle low end but this is ridiculous. Come to find out my main pre outs front and rear are 5 volts and my sub out is 2 volts. I haven't messed with the gain yet, I just found out this info, not sure yet how if at all this is affecting my low output. I didn't know pre outs had rated voltage or that it matters. My other problem is with the cross overs. The amp and h/u both have cross overs that are always on. It's my understanding to only use one but in this case I can't. The LPF on the amp is adjustable from 50-200Hz and my h/u has a selectable one, 55Hz, 85Hz, 125Hz. My thought is to turn up the amp to 200Hz and then use the h/u to do 85Hz. I read somewhere about cross overs introducing phase shift and causing problems when doubled up. I have no idea what that means, yet. Am I screwed with these two crossovers? [/QUOTE]
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