Tek Posted May 26, 2010 Report Share Posted May 26, 2010 ok so I hear that you can blow a sub by playing it below its tuning frequency. But say if a box is tuned at 34 HZ, will you blow it by playing it at like, 33 or 32 HZ? How far below the tuning frequency do you have to be before you need to watch out? Quote Link to comment Share on other sites More sharing options...
C-Fizzy Posted May 26, 2010 Report Share Posted May 26, 2010 I think it's around 4 hertz below your tuning frequency. Quote under construction I hate People with crappy primered cars rolling on hubcaps that are louder then me. u hate c-fizzy? Link to comment Share on other sites More sharing options...
superdave07 Posted May 26, 2010 Report Share Posted May 26, 2010 Are you talking about the tuning of your sub or the box? Quote Xterra * 69 Camaro * Audi S5 36 Ford * 51 Mercury looking for wire sponsor www.flyracing.com Link to comment Share on other sites More sharing options...
BeachJoshua Posted May 26, 2010 Report Share Posted May 26, 2010 So these vids where people purposely blow subs, why dont they put them in a box and play low tones? Quote | S-10 | 4.5^3 ft | 33Hz | SAE-1000D @ 1 Ohm | 2 SA-12s | SPL: 143.7 Sealed | 153.4 Port Wars Link to comment Share on other sites More sharing options...
HHR Ed Posted May 26, 2010 Report Share Posted May 26, 2010 tuning frequency is very general of a term. It could mean the peak or the F3. Either way, it is on a slope of output. So there is no exact point. It would depend on how much power and how much unloading is occurring. What happens under a the F3 point of en enclosure is that the port and enclosure no longer hold air as a spiring supporting the cone of the woofer. They start to act more like free air. Some woofers can handle this extra, unsupported excursion and some cannot. Depends on the woofer and the power level. Quote Ed Lester ShowtimeSPL Host Showtime Electronics Video MarketingMy old Build Loghttp://www.stevemead...08/#entry511451http://www.youtube.com/showtimespl 5 time dB Drag Finalist Last ride 2007 HHR, current dB 153.5 and bass race 149.4 dB. 153.0 dB on music New Ride, 2008 HHR SS. Build under way. Loudest score ever = 171dB 2009 dB Drag Racing, North American Points Champion Link to comment Share on other sites More sharing options...
fritosaregood Posted May 26, 2010 Report Share Posted May 26, 2010 tuning frequency is very general of a term. It could mean the peak or the F3. Either way, it is on a slope of output. So there is no exact point. It would depend on how much power and how much unloading is occurring. What happens under a the F3 point of en enclosure is that the port and enclosure no longer hold air as a spiring supporting the cone of the woofer. They start to act more like free air. Some woofers can handle this extra, unsupported excursion and some cannot. Depends on the woofer and the power level. agreed, this is a big factor. the smaller your port area, the sub should be able to go farther below tuning before unloading on itself. you usually wont hear much when you go too far below the tune anyway. and ppl dont do that to blow subs because its usually only mechanical failure that happens and things rip apart, unless the coil jumps the gap and hits the top plate on the way back in. not any pretty smoke doing it like that. Quote seller feedback: http://www.stevemeadedesigns.com/board/ind...showtopic=61719 http://www.stevemeadedesigns.com/board/ind...showtopic=68281 build log: http://www.stevemeadedesigns.com/board/index.php?showtopic=44800 Gf's build: http://www.stevemeadedesigns.com/board/topic/54346-kickergirls-camaro-new-box-pg-5/#entry753970 Link to comment Share on other sites More sharing options...
IH8PunkRok Posted May 26, 2010 Report Share Posted May 26, 2010 (edited) the equation i use to find F3 is as follows F3 = (Vas / Vb)^1/2 (Fs) Vas being a T/S parameter of the sub Vb being the enclosure volume (not sure if it is before or after displacement. i use after) and Fs is the resonant frequency (also listed in T/S parameters) this will give you a general idea of where not to play Edited May 26, 2010 by IH8PunkRok 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...
DirtyD78 Posted May 26, 2010 Report Share Posted May 26, 2010 wow i just learned sumthin new ty guys Quote 2003 CHEVY SILVERADO REG CAB H/U SONY W/ IPOD TOUCH new build 2 dc audio lvl4 xl's rd audio 3250 box is behind the seats below the window 3.44 after tuned@34 htz 147.3@44 htz & getting louder Link to comment Share on other sites More sharing options...
cheese20323 Posted May 26, 2010 Report Share Posted May 26, 2010 me too. But I sort of got it when i was setting my LPF and Subsonic.... Quote 92 Accord Build Link to comment Share on other sites More sharing options...
Tek Posted May 26, 2010 Author Report Share Posted May 26, 2010 Are you talking about the tuning of your sub or the box? the box. but if I tune a box to 34 HZ, that's low enough to the point that I shouldn't have too many problems? Quote Link to comment Share on other sites More sharing options...
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