LoudBimmer Posted October 25, 2013 Report Share Posted October 25, 2013 What is the formula for calculating the port frequency in the 6th order band pass? So I have all of the numbers, except the port 2 frequency, which I need to calculate. Link to comment Share on other sites More sharing options...
95neon_thumper82 Posted October 26, 2013 Report Share Posted October 26, 2013 let me get this right quick... you are basically putting a normal box in the trunk then porting the trunk? <img src=http://i1332.photobucket.com/albums/w610/beastly666bassboy/IMG_9611192581855_zps9b9b76be.jpg border=0 alt= height="75" width="800"> Growing old is necessary... growing up is an option! Have fun or you might as well fall into a 6 foot deep hole. Its much easier to be smart and act stupid then it is to be stupid and act smart! You're only limited by your imagination! Stop limiting yourself! Optima yellow top6 guage cableJVC KD S36 headunitPower acoustik 1600w 750w rms @2 ohmsTwo MTX thunder 7000 10"sSealed box @4.04 ft^3Mojo Mat in the trunk Coming soon:1/0 awg cablebig 3... in 6 gauge(till i can get the money for 0)planet audio Crossover.2- 3.5's for the front.2- 6.5's for the doors2- 6x9's for the rear3- MB Quartz amps to power it all.1- 6" aeroport...soon! <p>My Log! Link to comment Share on other sites More sharing options...
95neon_thumper82 Posted October 26, 2013 Report Share Posted October 26, 2013 it should be the same as tunning any other box. I use winisd for my 6ths but torres get pretty close results to winisd. enter your cubes of free air... total trunk volume minus the total displaced by the inside box <img src=http://i1332.photobucket.com/albums/w610/beastly666bassboy/IMG_9611192581855_zps9b9b76be.jpg border=0 alt= height="75" width="800"> Growing old is necessary... growing up is an option! Have fun or you might as well fall into a 6 foot deep hole. Its much easier to be smart and act stupid then it is to be stupid and act smart! You're only limited by your imagination! Stop limiting yourself! Optima yellow top6 guage cableJVC KD S36 headunitPower acoustik 1600w 750w rms @2 ohmsTwo MTX thunder 7000 10"sSealed box @4.04 ft^3Mojo Mat in the trunk Coming soon:1/0 awg cablebig 3... in 6 gauge(till i can get the money for 0)planet audio Crossover.2- 3.5's for the front.2- 6.5's for the doors2- 6x9's for the rear3- MB Quartz amps to power it all.1- 6" aeroport...soon! <p>My Log! Link to comment Share on other sites More sharing options...
95neon_thumper82 Posted October 26, 2013 Report Share Posted October 26, 2013 keep in mind this idea seems like the trunk has massively more air than what the box takes up so you may peaky closer ti the high side tuning. just a heads up <img src=http://i1332.photobucket.com/albums/w610/beastly666bassboy/IMG_9611192581855_zps9b9b76be.jpg border=0 alt= height="75" width="800"> Growing old is necessary... growing up is an option! Have fun or you might as well fall into a 6 foot deep hole. Its much easier to be smart and act stupid then it is to be stupid and act smart! You're only limited by your imagination! Stop limiting yourself! Optima yellow top6 guage cableJVC KD S36 headunitPower acoustik 1600w 750w rms @2 ohmsTwo MTX thunder 7000 10"sSealed box @4.04 ft^3Mojo Mat in the trunk Coming soon:1/0 awg cablebig 3... in 6 gauge(till i can get the money for 0)planet audio Crossover.2- 3.5's for the front.2- 6.5's for the doors2- 6x9's for the rear3- MB Quartz amps to power it all.1- 6" aeroport...soon! <p>My Log! Link to comment Share on other sites More sharing options...
03silvergt Posted October 27, 2013 Report Share Posted October 27, 2013 Not to high jack your thread but what does all this 4th order, 5th order, and 6th order mean? 2017 Chevrolet Silverado LT CC - Will be running 2-3 DC Audion M3 8s, unsure of amp, Mechman 320 amp alt. 2005 Ford F150 - Bagged on 24s, fully shaved, raised bed floor. Link to comment Share on other sites More sharing options...
Swordlordboy1234 Posted October 27, 2013 Report Share Posted October 27, 2013 It might be better to actually make a box inside the box. If you try to use the trunk that would be similar to using a leaky or flexing box. As for the 6th order I thought that you tune one wicked high like in the 50-60hz and one way low like in the 28's. I'm most likely wrong on both of those numbers. But I thought I read something about it a few weeks back. To answer the guy asking about 4th and 6th orders (no 5th) ... They are bandpass boxes that increase efficiency, and with a 4th order, increases frequency range and efficiency... And with 6th orders mostly just efficiency but some of them can still have crazy frequency range. Example, mike singer. You might ask, why doesn't everyone do a 4th or 6th order then since they are so much louder then sealed or ported... Well because not all drivers are meant for 4th orders and 6th orders are way hard to design in most cases, and it would be better to go simple ported with woofers that are good for either ported or 6th order boxes. 4th orders are slightly easier to design then 6th, still not super super easy, but also the driver in a 4th order should be able to perform in both sealed and ported boxes to work in a 4th order properly. 4th and 6th orders also take up WAY more space then simple ported or sealed boxes. Sometimes it's easier to just add the extra woofers to take up that space that the 4th or 6th would take up and just stick with ported. My old YouTube channel : http://www.youtube.com/user/SwordLords1234?feature=mhee My old build log : http://www.stevemeadedesigns.com/board/topic/161872-96-accord-b2-sundown-sky-high-dc-power-re-re-build-for-heatwave/page-37 My New Build - http://www.stevemeadedesigns.com/board/topic/207041-2016-mazda-6-sql-build/ 2016 Mazda 6 Touring JL Fix 86 - OEM signal correction B2 prototype DSP 6to8 B2 Ref63 - 3 way active set 2 B2 Class H quattro's 1 B2 Zero.5R @.5 2 B2 HNv3 12 d2 B2 SLIP40 - Lithium in the trunk Northstar Group 35 under the hood 100ft 2/0 welding cable 30ft 4ga welding cable 20ft 8ga welding cable All stinger OFC speaker wire Soundrive custom RCA's Tons of attention to detail.... Can it be perfect? Link to comment Share on other sites More sharing options...
LoudBimmer Posted October 27, 2013 Author Report Share Posted October 27, 2013 I'm trying to use trunk as a box. I will seal trunk walls with either foam or second skin to eliminate the rattling. Also, one side will have the 4 channel amp glassed in there and the other will have 2 batteries mounted. So I only will have the space in the middle, which should be around 8 CF, or less. The box will be 1 CF. I'm trying to figure out what the ski hole port is currently tuned to. I might grab 2 12" to help move more air out of the trunk, but for now it will be 2 10's. Link to comment Share on other sites More sharing options...
bbeljefe Posted October 27, 2013 Report Share Posted October 27, 2013 First to clarify things... subs with a low EBP perform better in 4th order boxes and subs with high EBPs perform better in 6th order boxes. And then, subs with mid range EBPs (50-90) will perform well in either. ← And to further clarify.... GENERALLY speaking. Yes, I know some of you used a low EBP sub in a 6th and it slammed. That's the exception, not the rule. Also, when using a low EBP in a vented alignment, get ready to take up a huge amount of space in order to get a decent curve. Sixth order bandpass boxes are usually tuned 1, 1.5 or two octaves apart. Some say only one of those three options will work every time and some say none of them will. I've tuned 6ths 2.5 octaves apart and they performed well and I've tuned them a half octave apart with good results so I don't subscribe to that theory as a rule of thumb for design. It is, however, a good place to start. As far as box tuning, here's a good resource. Also, get hold of a copy of WinISD Beta if you plan to build a parallel tuned 6th or WinISD Pro (it's free) if you plan to build a series tuned 6th. I have very little experience with series tuned 6th orders so I have nothing of value to add to the discussion of how to achieve a flat response from them. Facebook: facebook.com/audioanarchyllc Instagram: audioanarchyllc Youtube: youtube.com/bbeljefe Link to comment Share on other sites More sharing options...
95neon_thumper82 Posted October 27, 2013 Report Share Posted October 27, 2013 Not to high jack your thread but what does all this 4th order, 5th order, and 6th order mean? never heard of a 5th order. the orders has to do with sections and ports... I read once a description but it currently evades me. but a section adds a number and a section with a port adds more of a number.... <img src=http://i1332.photobucket.com/albums/w610/beastly666bassboy/IMG_9611192581855_zps9b9b76be.jpg border=0 alt= height="75" width="800"> Growing old is necessary... growing up is an option! Have fun or you might as well fall into a 6 foot deep hole. Its much easier to be smart and act stupid then it is to be stupid and act smart! You're only limited by your imagination! Stop limiting yourself! Optima yellow top6 guage cableJVC KD S36 headunitPower acoustik 1600w 750w rms @2 ohmsTwo MTX thunder 7000 10"sSealed box @4.04 ft^3Mojo Mat in the trunk Coming soon:1/0 awg cablebig 3... in 6 gauge(till i can get the money for 0)planet audio Crossover.2- 3.5's for the front.2- 6.5's for the doors2- 6x9's for the rear3- MB Quartz amps to power it all.1- 6" aeroport...soon! <p>My Log! Link to comment Share on other sites More sharing options...
95neon_thumper82 Posted October 27, 2013 Report Share Posted October 27, 2013 I'm trying to use trunk as a box. I will seal trunk walls with either foam or second skin to eliminate the rattling. Also, one side will have the 4 channel amp glassed in there and the other will have 2 batteries mounted. So I only will have the space in the middle, which should be around 8 CF, or less. The box will be 1 CF. I'm trying to figure out what the ski hole port is currently tuned to. I might grab 2 12" to help move more air out of the trunk, but for now it will be 2 10's. damn I'd say make the inside box slightly bigger. you want the ratio of front to back to be closer I like 1:1.5 the bigger side should be the deep tuned side.it gices you a flatter response between the tunings and spread the tunings out some. if you are going for a good sq type of a 6th. other wise tune closer and have a one note loud as hell box. its all about what you want from it. <img src=http://i1332.photobucket.com/albums/w610/beastly666bassboy/IMG_9611192581855_zps9b9b76be.jpg border=0 alt= height="75" width="800"> Growing old is necessary... growing up is an option! Have fun or you might as well fall into a 6 foot deep hole. Its much easier to be smart and act stupid then it is to be stupid and act smart! You're only limited by your imagination! Stop limiting yourself! Optima yellow top6 guage cableJVC KD S36 headunitPower acoustik 1600w 750w rms @2 ohmsTwo MTX thunder 7000 10"sSealed box @4.04 ft^3Mojo Mat in the trunk Coming soon:1/0 awg cablebig 3... in 6 gauge(till i can get the money for 0)planet audio Crossover.2- 3.5's for the front.2- 6.5's for the doors2- 6x9's for the rear3- MB Quartz amps to power it all.1- 6" aeroport...soon! <p>My Log! Link to comment Share on other sites More sharing options...
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