Jeffl Posted April 9, 2012 Report Share Posted April 9, 2012 When listening to my music I can only hear my sub when I turn the volume to about 10 on my hu, should I be able to have my hu vol at 1 and still hear my sub? Or is it just a thing with the sub that it only turns on with enough volts from my pre amps? Just wondering. Quote Link to comment Share on other sites More sharing options...
Jeffl Posted April 9, 2012 Author Report Share Posted April 9, 2012 The hu is a jvc kd-r820bt with 2.5v pre amps. Used a ddm to set gains on amp. Quote Link to comment Share on other sites More sharing options...
zack_e89 Posted April 9, 2012 Report Share Posted April 9, 2012 It's all about what you want, really. You can turn your sub level down(on head unit) so that you can barely hear it at full volume, or hear it loud as hell at ~10%. It's however you want your system to sound, just be careful of clipping/distorting your sub. With that said, I've never owned a JCV h/u, but I've always kept my sub level at 0 and loudness off, so maybe you could start there. Quote 97 Suburban 8 custom PSI Platform 3 18's Link to comment Share on other sites More sharing options...
Jeffl Posted April 9, 2012 Author Report Share Posted April 9, 2012 When I set my subs gain I had the subwoofer setting at +08 which is max. Also have a rf punch control which is a gain knob (yes I have tested this) but even at my full gain I don't get any sub response until about 25% (10-40)of my max clean head unit volume Quote Link to comment Share on other sites More sharing options...
HunterJohnson Posted April 9, 2012 Report Share Posted April 9, 2012 I had that problem, it was bc my RCA's weren't putting out much of a signal until it was around volume 30-40. I bought a line driver, problem solved 4V all day everyday Quote Scion tC SQ BuildiPad mini, lots of fabrication, daily drivenFord Explorer C Pillar Wall Build Just a cheap car to destroy with bass Link to comment Share on other sites More sharing options...
Jeffl Posted April 10, 2012 Author Report Share Posted April 10, 2012 Well found out at my 75% max volume my rcas where only putting out .3 volts, so retuned my amps knowing that's how much voltage there getting and my sub is 20x louder and cleaner. Quote Link to comment Share on other sites More sharing options...
Jeffl Posted April 10, 2012 Author Report Share Posted April 10, 2012 Instead of the 2.5v I thought I was sending to the amp Quote Link to comment Share on other sites More sharing options...
IH8PunkRok Posted April 10, 2012 Report Share Posted April 10, 2012 .3 volt pre outs... That is a problem Quote -Matt2005 Dodge Magnum RTJVC KD-AVX1 2 PPI S580.2 Obsidian Audio ST1 Horn Tweeters PRV 8MB450s Audio Legion 3500.1D 2 RE MT 18s 360 ah LiFePO4 BatterySHCA 2/0 155.2 @ 29 hzKicker CVR 15's buildDD 3512e buildMini T-Line Build(6) 8s BuildNightshade 15s Wall BuildMagnum AB XFL 12s BuildNewest Magnum Build Link to comment Share on other sites More sharing options...
Kranny Posted April 10, 2012 Report Share Posted April 10, 2012 sub level had to be turned up all the way. your head unit probably doesn't clip til like 90% if it's that low but don't try it without proper equipment you don't need a line driver. Quote Link to comment Share on other sites More sharing options...
Kranny Posted April 10, 2012 Report Share Posted April 10, 2012 head unit volume is probably exponential instead of linear. hence why there is no real power til like volume 30 or whatever Quote Link to comment Share on other sites More sharing options...
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