abervintageman42 Posted September 24, 2009 Report Share Posted September 24, 2009 okay so my amp is making a high pitched whining noise, and when i turn the HU past volume 12 or so out of 35 it makes the subs sound like they are blown and the subs begin to bottom out, i checked all my wires, im beginning to think its the HU? (alpine cde-9872) any help is appreciated! Quote Link to comment Share on other sites More sharing options...
andym85 Posted September 24, 2009 Report Share Posted September 24, 2009 how high is the gain on the amp? unplug the rca's and see if the amp still makes the noise Quote i likes me some audio stuff... Link to comment Share on other sites More sharing options...
davewms9605 Posted September 24, 2009 Report Share Posted September 24, 2009 I had a Pioneer do that on me one time. It was playing fine for a long time just pushing 2-12's and an amp. then one day, i start my car up and i got this loud whine and my subs sounded ugly as hell. I tried everything and even took it to a stereo shop and paid a $40 diagnostic and found out my preamp output on my H/U took a shit! Bought a new H/U and wala, Bump back in the trunk and actually sounded twice as better!! Quote Current Setup: Sony CDX-7401UI 2- 12" Alpine TypeR DVC2ohm Subs Custom ported box 4-American Bass 6.5in SQ-6B Mids 4-Pioneer TS-T15 Tweeters 2-Crunch P1500.1 Mono Amps 2-runs 1/0 GA KnuKonceptz KnuKonceptz RCA's 1-Stinger SPV44 Battery Coming soon: 250 Amp Alt Custom Door Panels Second Skin Sound Deadner All in my 1986 Monte Carlo SS!!! Link to comment Share on other sites More sharing options...
abervintageman42 Posted September 24, 2009 Author Report Share Posted September 24, 2009 I had a Pioneer do that on me one time. It was playing fine for a long time just pushing 2-12's and an amp. then one day, i start my car up and i got this loud whine and my subs sounded ugly as hell. I tried everything and even took it to a stereo shop and paid a $40 diagnostic and found out my preamp output on my H/U took a shit! Bought a new H/U and wala, Bump back in the trunk and actually sounded twice as better!! yeah i may have to pop my old ass panasonic back in there and that damn thing skips everytim the bass hits lol Quote Link to comment Share on other sites More sharing options...
abervintageman42 Posted September 24, 2009 Author Report Share Posted September 24, 2009 how high is the gain on the amp?unplug the rca's and see if the amp still makes the noise gain is almost all the way up, mainly b/c it cant push these subs b/c its an over rated amp, but im carefull about that, it know it doesnt make my subs clip Quote Link to comment Share on other sites More sharing options...
abervintageman42 Posted September 24, 2009 Author Report Share Posted September 24, 2009 so i went out to my truck this morning and disconnected the RCAs from my Headunit but left the amp on and w/ the RCAs disconnected it still makes all the noises i described previously, obviously at this point its the amp, but i dont have the original packaging so i dont think its covered under warranty, is there any way i can repair it? im not familiar with the internals of amps so i would rather just do it if its a simple fix or if they wont cover it under warranty, which im hoping they will Quote Link to comment Share on other sites More sharing options...
abervintageman42 Posted September 24, 2009 Author Report Share Posted September 24, 2009 anyone? Quote Link to comment Share on other sites More sharing options...
zfrerichs Posted September 25, 2009 Report Share Posted September 25, 2009 what kind of amp is it? Quote Roseville, CA Link to comment Share on other sites More sharing options...
abervintageman42 Posted September 25, 2009 Author Report Share Posted September 25, 2009 its a power acoustik LFA1 2000D, i know i know but its all i could afford when my other amp blew and they only gave me enough to buy that amp from the warranty money...... Quote Link to comment Share on other sites More sharing options...
scfaust Posted September 25, 2009 Report Share Posted September 25, 2009 did u take the rca out of the amp because i hade bad rca's one time that did that without being hooked up to the deck Quote http://i720.photobucket.com/albums/ww203/scfaust1/alphadamp.png Link to comment Share on other sites More sharing options...
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