donellk Posted December 1, 2011 Author Report Share Posted December 1, 2011 my biggest concern is how do you know if a woofer will work well in a bandpass enclosure? please explain this detail for me and others. That would be another advantage of having bassbox pro! You can type in all the specs of the woofer and plot out the performance of that subwoofer in the 4th order! Lol they should hire me for advertising lol! I guess the quickest way would be with a call or email to the manufactor they'll be able to tell you if itll work and sometimes even give u recommended specs! Before I designed the one I built I talked to my power acoustik sales rep! Team Xtreme Amperage Xtreme Audio Innovations XtremeAudioInnovations.com Facebook.com/xtremeaudio321 basics of a 4th order ~ 1993 Toyota Pickup~ 4 linked c notched bagged Fiberglass door panels (5 speakers per door) Link to comment Share on other sites More sharing options...
donellk Posted December 1, 2011 Author Report Share Posted December 1, 2011 Sorry to be the idiot of the group, but what are the Fs and Qts? Check out the bottom of this page http://www.diysubwoofers.org/definitions.htm Team Xtreme Amperage Xtreme Audio Innovations XtremeAudioInnovations.com Facebook.com/xtremeaudio321 basics of a 4th order ~ 1993 Toyota Pickup~ 4 linked c notched bagged Fiberglass door panels (5 speakers per door) Link to comment Share on other sites More sharing options...
6berry Posted December 1, 2011 Report Share Posted December 1, 2011 Sorry to be the idiot of the group, but what are the Fs and Qts? the Fs and the qts are part of the T/S parameters. Fs is resonant frequency. im not exactly sure what the qts is but it plays a big part in deciding whether a driver will work in sealed, ported, or free air 1999 Audi A4 1.8T::: 4 - DC Level 3 10's in a 4th order Rockford P6002 on Subs for now (3-3.5k coming eventually) MB Quart ONX4.60 for Mids and Highs Boston S50 Components in Front Boston S65 Coaxials in Rear 40 Sq Ft of Second Skin Damplifier Build Thread UBL 1948 Plymouth Link to comment Share on other sites More sharing options...
scooter99 Posted December 1, 2011 Report Share Posted December 1, 2011 Thanks guys! Facebook Page: S99Creations 2006 F250 Lariat Build Link to comment Share on other sites More sharing options...
Sanitarium Posted December 1, 2011 Report Share Posted December 1, 2011 i really REALLY wish people would stop hugging up to the whole ratio thing. dumbasses squeezing down the sealed side in search of a higher ratio/more peak. Seriously. build the sealed side to spec/desired F3. then build ported side to accomodate taste. peaky or flat is up to you. Throw the whole notion of ratios out the damn door. So what you are saying is just build the Ported side to your liking? My 4 12's are in a sealed box right now but i have two seperate chambers for each pair of subs, could i turn this box in to a 4th order? If you really want to be that ghetto and glue your current box onto a ported box thats built correctly, go for it. Oh and on a regular ported box you tune lower due to the sin wanting to unload below tuning. This wrong happen with a 4th order. Link to comment Share on other sites More sharing options...
UnderLoK Posted December 1, 2011 Report Share Posted December 1, 2011 i really REALLY wish people would stop hugging up to the whole ratio thing. dumbasses squeezing down the sealed side in search of a higher ratio/more peak. Seriously. build the sealed side to spec/desired F3. then build ported side to accomodate taste. peaky or flat is up to you. Throw the whole notion of ratios out the damn door. So what you are saying is just build the Ported side to your liking? My 4 12's are in a sealed box right now but i have two seperate chambers for each pair of subs, could i turn this box in to a 4th order? If you really want to be that ghetto and glue your current box onto a ported box thats built correctly, go for it. Oh and on a regular ported box you tune lower due to the sin wanting to unload below tuning. This wrong happen with a 4th order. So what consideration then do you give the cabin? I ask because the big 4ths I've been in would shit the bed if you were to open a door. That leads me to believe (by your comment) that you can do something to prevent that from happening. If at first you do not succeed, you are doing it wrong! -ARSCheck out my walled TBSS build over here4 Fi Team 18s on 2 Cactus K9 DS18 doors on 2 MBQ 1Ks, Vifa pillars on a STL4.500 Pioneer X8500 6 XS Power D7500, 1 3400S Second Skin 2 270a Mechman Alts Link to comment Share on other sites More sharing options...
Punkeyboozter Posted December 2, 2011 Report Share Posted December 2, 2011 i really REALLY wish people would stop hugging up to the whole ratio thing. dumbasses squeezing down the sealed side in search of a higher ratio/more peak. Seriously. build the sealed side to spec/desired F3. then build ported side to accomodate taste. peaky or flat is up to you. Throw the whole notion of ratios out the damn door. So what you are saying is just build the Ported side to your liking? My 4 12's are in a sealed box right now but i have two seperate chambers for each pair of subs, could i turn this box in to a 4th order? If you really want to be that ghetto and glue your current box onto a ported box thats built correctly, go for it. Oh and on a regular ported box you tune lower due to the sin wanting to unload below tuning. This wrong happen with a 4th order. So what consideration then do you give the cabin? I ask because the big 4ths I've been in would shit the bed if you were to open a door. That leads me to believe (by your comment) that you can do something to prevent that from happening. I think that is for extreme cars where the cabin actually forms part of the box. So essentially they are taking the reading in the port and hence the crazy numbers they post. Open the door and the tuning will go whack Loudness is no substitute for musicianship, and partial deafness is no badge of honor. I was once able to hear this advice. Build Log>>> http://www.stevemeadedesigns.com/board/ind...pid=672024& New Build Believe in the order Link to comment Share on other sites More sharing options...
mlstrass Posted December 2, 2011 Report Share Posted December 2, 2011 subs with very stiff suspensions are not 4th order friendly......like HDC's and 9500 DD's. Link to comment Share on other sites More sharing options...
MrSkippyJ Posted December 2, 2011 Report Share Posted December 2, 2011 Now here is where it gets fun... Your subwoofer needs to come from the sealed section facing into the ported section. This strikes my curiosity. I have seen tons of 4th orders with subs inverted. F150: Stock 2019 Harley Road Glide: Amp: TM400Xad - 4 channel 400 watt Processor: DSR1 Fairing (Front) 6.5s -MMats PA601cx Lid (Rear) 6x9s - TMS69 Link to comment Share on other sites More sharing options...
Punkeyboozter Posted December 2, 2011 Report Share Posted December 2, 2011 Now here is where it gets fun... Your subwoofer needs to come from the sealed section facing into the ported section. This strikes my curiosity. I have seen tons of 4th orders with subs inverted. I think inverted is better, you can smell the coils if you screw up and it helps with the cooling. Im still wondering how much port is enough. They say to go for at least the same amount as cone area but then you get ridiculous port lengths and without screwing the gain its hard to maintain. Loudness is no substitute for musicianship, and partial deafness is no badge of honor. I was once able to hear this advice. Build Log>>> http://www.stevemeadedesigns.com/board/ind...pid=672024& New Build Believe in the order Link to comment Share on other sites More sharing options...
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