doubleD Posted March 12, 2009 Report Share Posted March 12, 2009 had an amp that powered subs pretty hard but wouldnt really hit the low stuff like 20hrtz an below. thought it was the box but when i turned the filter way down the subs came alive. they started playing shit so low that i had shit flexing like never before. then started having problems with amp......do others use them up or way down Quote Link to comment Share on other sites More sharing options...
ptcary Posted March 12, 2009 Report Share Posted March 12, 2009 had an amp that powered subs pretty hard but wouldnt really hit the low stuff like 20hrtz an below. thought it was the box but when i turned the filter way down the subs came alive. they started playing shit so low that i had shit flexing like never before. then started having problems with amp......do others use them up or way down I don't think there is really any music down that low anyway. I set mine ~30hz with my wall tuned to 38hz. Quote PTCary 2003 SMD PT Cruiser 2011 Honda CBR 250R 2010 Mazda 3i Sport MY BUILD LOG Link to comment Share on other sites More sharing options...
lowblueranger Posted March 12, 2009 Report Share Posted March 12, 2009 Turn it on in a ported box -off in sealed box. Quote Alpine INA-W900 Rockford Fosgate Punch 200ix Rockford Fosgate power T1500-1 Sundown SA-10 x2 Focal 6x8's front Rockford Fosgate Power T1682 rear Rockford Fosgate and Stinger Wiring Powermaster D3400, S680 Link to comment Share on other sites More sharing options...
Nightshade Posted March 12, 2009 Report Share Posted March 12, 2009 All a subsonic filter does is saves your amp from making power at frequencies that aren't being played in your music. For example if you are listening to some Fall out Boy or something without a ton of bass you are still going to have frequencies in the 20hz range during the song. Instead of wasting power on those freq's that aren't even going to be loud anyway you turn on the subsonic and it keeps the amp from playing those particular freq's and it saves you power for the actual peaks in the song. SPL competitors usually don't use a subsonic filter cause they are burping a specific test tone and don't need to filter out lower freq's, and this allows the amp to make more power all together cause it's not cutting off a band of freq's. Quote 2013 VW Jetta GLI 2.0 Turbo 1 Sundown Audio SCV2000 1 Sundown Audio X15 V2 1 XS Power D3100 Audio Control LC6i Stock Deck 146.4 sealed on the dash at 37hz 2001 Focus ZX3: RETIRED Team Sundown Audio, Team XS Power, 2 time NSPL Car 3601-Up Champion, 2 time NSPL Car Hardcore ChampionHighest NSPL Scores to date:154.3db on the dash sealed at 46hz, 156.2db in the kick at 46hz155.2db unofficial on dash at 43hz Link to comment Share on other sites More sharing options...
doubleD Posted March 12, 2009 Author Report Share Posted March 12, 2009 All a subsonic filter does is saves your amp from making power at frequencies that aren't being played in your music. For example if you are listening to some Fall out Boy or something without a ton of bass you are still going to have frequencies in the 20hz range during the song. Instead of wasting power on those freq's that aren't even going to be loud anyway you turn on the subsonic and it keeps the amp from playing those particular freq's and it saves you power for the actual peaks in the song. SPL competitors usually don't use a subsonic filter cause they are burping a specific test tone and don't need to filter out lower freq's, and this allows the amp to make more power all together cause it's not cutting off a band of freq's. what about in bass songs like bass i love you.. theres a couple of really low notes in it that it wouldnt play until i turned it way down Quote Link to comment Share on other sites More sharing options...
Team_DC-Derrick Posted March 12, 2009 Report Share Posted March 12, 2009 i believe he is referring to every day music, like actual songs that play on the radio that you have on cds and stuff, not stuff you download thats strictly for bass Quote The DC Integra 3 18s to 6 15 build log Team_DC-Derrick's Youtube Team DC Audio where theres a will theres a wall....... I just realized Steve has reach Voldemort status, over on JP's site he is the one who will not be named....."We dont speak his name over here, fearing it will destroy us" LOL not even in hush tones Link to comment Share on other sites More sharing options...
thehoe92 Posted March 12, 2009 Report Share Posted March 12, 2009 it also protects the sub from bottoming out. some subs can't handle real low notes. there are also some theories on the back pressure in some boxes of low hz notes that screw up the sub. Quote Wouldnt be thehoe92 without teh purple Link to comment Share on other sites More sharing options...
doubleD Posted March 12, 2009 Author Report Share Posted March 12, 2009 it also protects the sub from bottoming out.some subs can't handle real low notes. there are also some theories on the back pressure in some boxes of low hz notes that screw up the sub. well i have 4_18'' in a box much like meades with 200sq inch port.. treo subs an amps Quote Link to comment Share on other sites More sharing options...
MATTMAN24 Posted March 12, 2009 Report Share Posted March 12, 2009 learn something new everyday, so boils down to this daily driver leave it on, doing comps turn it off right? Quote HIDS and projector headlights forsale http://www.stevemeadedesigns.com/board/topic/99528-hid-projector-headlights-and-hid-kit-look/ 24's and Tires forsale http://www.stevemeadedesigns.com/board/topic/100286-24s-with-tires-for-sale-east-texas/ Link to comment Share on other sites More sharing options...
Torres Posted March 12, 2009 Report Share Posted March 12, 2009 box tuning also plays a role. i believe most people have it set to around 10 hz below tuning frequency. and i would only leave it off for burping. bassrace/driveby leave it on Quote Link to comment Share on other sites More sharing options...
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