Dan208 Posted March 21, 2010 Report Share Posted March 21, 2010 I noticed this problem starting about a week ago. My sub will lose output by about half and play like that for a while, then start pounding again. It doesn't seem to matter if the volume is high or low. I checked all the wiring going into the amp and everything is tight. Took the sub out of the box and recrimped everything. I'm running the stock HU, an MTX RFL600D and a 10" Clarion SW1051. Amp is only running at 4 ohms (rated 300 watts @ 4 ohms). Stock electrical also. Lights don't dim at all. I've got a spare sub laying around, but it's a 12" and I don't have a box for it and no means to whip up a temporary box. What's the best way to start eliminating what the problem could be? Would it be a bad idea to run the 12" free air for a few days to see if it could be the amp? Other than that I have no idea where to start. Quote Feedback thread- http://www.stevemeadedesigns.com/board/topic/70871-dan208-feedback-thread/page__p__981961__hl__dan208__fromsearch__1entry981961 Link to comment Share on other sites More sharing options...
treossi Posted March 21, 2010 Report Share Posted March 21, 2010 yeah not sure where to start on this one, but i'd check resistance of the coil, and make sure that's fine, whats the gain setting and bassboost settings read on your amp, also running free air would be bad for a couple of days.. more info needed take a picture of your amplifier settings Quote Team sundownWESTCOASTSPL.COM we're throwing dbdrag events very soon visit the website for details Link to comment Share on other sites More sharing options...
Dan208 Posted March 21, 2010 Author Report Share Posted March 21, 2010 yeah not sure where to start on this one, but i'd check resistance of the coil, and make sure that's fine, whats the gain setting and bassboost settings read on your amp, also running free air would be bad for a couple of days.. more info needed take a picture of your amplifier settings I'll check the resistance later today (finally get to use my new DMM ). Bass boost is all the way down and gain is pretty low (maybe around a quarter, definately below half). I'll try and get some pics too. Quote Feedback thread- http://www.stevemeadedesigns.com/board/topic/70871-dan208-feedback-thread/page__p__981961__hl__dan208__fromsearch__1entry981961 Link to comment Share on other sites More sharing options...
chrispy Posted March 21, 2010 Report Share Posted March 21, 2010 this happens to me and what people have told me is 1 im not really wired at 2 ohms 2 my electrical sucks 3 its because the amp is clipping im thinking its just that i dont have good electrical and i have an old car which means old alternator.. and i only have a new battery thats all so i dont know i just go with it. its seemed to have got better recently now that i think about it. dont know why though, i havent done anything special Quote my system 2 12" diamond d3 subs Kenwood 500 watt class d mono amp On 4/14/2010 at 5:40 PM, Boon said: Waaaaaa my system has a minor issue that I can't figure out so I'm gonna quit audio. Fucking weak man. Link to comment Share on other sites More sharing options...
that guy Posted March 21, 2010 Report Share Posted March 21, 2010 (edited) when the subs get quieter is the amp hot? does the HU have any kind of attenuation button or setting that might be lowering the volume? is the amp connected to the HU using a converter to go from speaker level to rcas? Could it be acting up? Edited March 21, 2010 by that guy Quote “He has all the virtues I dislike and none of the vices I admire.” Winston Churchill Link to comment Share on other sites More sharing options...
Drek75633 Posted March 21, 2010 Report Share Posted March 21, 2010 The amplifier may be clipping and cutting the signal. Or the amp isn't getting the pre amp voltage it needs. Or it just may be the amp is having internal problems. Quote 2004 Mustang 3 18s 6 crossfire bmf 1700s strapped @ .5 161.2 db Daily driver 159.4 @ 45 hz 158.7 @ 35 hz 154.4 @ 25 hz Team Hz Addiction http://www.youtube.com/Drek75633 Link to comment Share on other sites More sharing options...
Dan208 Posted March 21, 2010 Author Report Share Posted March 21, 2010 when the subs get quieter is the amp hot? does the HU have any kind of attenuation button or setting that might be lowering the volume? is the amp connected to the HU using a converter to go from speaker level to rcas? Could it be acting up? Amp doesn't even get warm. No attenuation button on the HU. I've got an LOC that's brand new, so I hope that's not the problem. The spare sub is just an old Adire Audio Shiva that's been in the closet for 5+ years. I was just trying to think of another way to test the amp out and that's the only thing I could come up with. Quote Feedback thread- http://www.stevemeadedesigns.com/board/topic/70871-dan208-feedback-thread/page__p__981961__hl__dan208__fromsearch__1entry981961 Link to comment Share on other sites More sharing options...
Dan208 Posted March 21, 2010 Author Report Share Posted March 21, 2010 (edited) The amplifier may be clipping and cutting the signal. Or the amp isn't getting the pre amp voltage it needs. Or it just may be the amp is having internal problems. Yeah, I'm really worried the amp is crapping out. I bought it used a while back. Edit: Forgot to mention that the sub has never gotten warm or stinky. Edited March 21, 2010 by Dan208 Quote Feedback thread- http://www.stevemeadedesigns.com/board/topic/70871-dan208-feedback-thread/page__p__981961__hl__dan208__fromsearch__1entry981961 Link to comment Share on other sites More sharing options...
Dan208 Posted March 21, 2010 Author Report Share Posted March 21, 2010 Just checked the sub with a DMM and it's reading 3.6 ohms. I'll try and get out after bit and check the ground. Quote Feedback thread- http://www.stevemeadedesigns.com/board/topic/70871-dan208-feedback-thread/page__p__981961__hl__dan208__fromsearch__1entry981961 Link to comment Share on other sites More sharing options...
kmalinich Posted March 22, 2010 Report Share Posted March 22, 2010 is that sub dual voice coil? your coil leads could be coming off on one coil or something. Quote Link to comment Share on other sites More sharing options...
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