CONTROLLED FIRE

[LIFT4POWER]

Im glad alot of people enjoy my designs !

[Streifenbrille]

What is the musctitle?

[vjpixelchile]

hey! Congratulations, your design is amazing, I redesigned a 15''speaker and sounds great! :D

[vjpixelchile]

hey! Congratulations, your design is amazing, I redesigned a 15''speaker and sounds great :D

[TheShift2011]

well... there's somebody making the kind of bandpass i've been dying to see

[TheKriskooooooo7]

program ?

[lazzer408]

Your ports are too close to the back wall.

[LIFT4POWER]

@lazzer408 really? I haven't purposed anything that wouldn't work efficiently.

[troyger1]

@LIFT4POWER he is right it could limit the airflow if u have a sub with a wellsized xmax

[LIFT4POWER]

@troyger1 This was designed with high XMAX drivers

[troyger1]

@LIFT4POWER ok never mind then xD

[kintarben]

@troyger1 Not really, port length is what limits air flow...as long as he is a diameters length from the back that will not limit anything

[troyger1]

@kintarben if he wants to limit airflow that much then thats lookin good

[kintarben]

@troyger1 Yea all I was saying is that the port length is what limits it..not how close it is to the wall.

[DesignsByRyan]

@lazzer408 It looks like they're at least the port's width away from the back wall, which is plenty. You can even get closer than that with a "free-standing" port since the air has a complete 360° area to enter and exit the opening.

[lazzer408]

@DesignsByRyan Having built many enclosures, the "rule of thumb" that a port should be at least it's diameter away from the back is just that, a "rule of thumb". With a large xmax the problem only gets worse. When the port is too close to the rear you're making the air rush to the center where it compresses then has to make a sharp 90 to get out the port. My rule is 1.5-2x port diameter from the rear wall especially with high excursion drivers expected to opperate over a wide frequency range.

[jhonhd]

in sketshup ?????

[36MICHAELFUNKE]

does the original subwoofer box(the one inside) just get screwed/glued to th outer enclosure?? and does a back go on the outer enclosure??? if so or if not why?? and would i beable to use this desighn in my architecural design class? and if i can how do the specs work??? ( how would i know how big to make the both of the enclosures{the outside/inside})

[LIFT4POWER]

@36MICHAELFUNKE You can surely use this in you class.the model is shown with the top off.the middle chamber partitions are screwed and glued. The square in the rear is shown with the access panel removed. The size would be determined by the driver and how parabolic you want the results.

[nuttertube]

Kind of reminds me of a cross between a tuned ported enclosure, and a folded horn. If there are no issues with standing waves, then this would be a way around some in-room issues. If I were to build it thought I would remote mount the amp though. Have you tried building one yet?

[LIFT4POWER]

@nuttertube I have built similar cabinets in the past. These are great for smaller rooms.

[nuttertube]

@LIFT4POWER Thanks for the reply. I am currently in the middle of a HT sub build using a Dayton RSS390HF 15" sub. I was going for a well built, but common ported alignment DIY enclosure. Now you've got me thinking of this route though... : )

[StreetBurner01]

i know im gonna sound stupid but wat does the enclosure does???? i still cant understand dat???

[LIFT4POWER]

@StreetBurner01 This enclosure directs and preloads the driver without utilizing the environment for transfer function.

[al3x440]

what does fire have to do with a subwoofer enclosure?

[SNERK08]

wht program is this?

[LIFT4POWER]

@SNERK08 Google Sketchup

[jaredbellmore]

nice i use google sketch up too check out my stuff

[motorcrossrider11]

could you send me the box dimensions?

i was going to do this with a 12 inch alpine type r with about 900 RMS

and it says 1 to 2 cubic feet for ported so you would make the inside box 1.5 or so cubic feet but how did you caculate the size and legnth of the secondary ports?

im just trying to see what i can hit with a single 12

[farmorfarmor66]

lo malo es q le resta espacio al pasarjero,,, yo lo coloque debajo de los asientos dos bajos de 10 a cada lado con una pila en el medio,, quedo super y no quita espacio de nada

[sebastianblevdet]

lol contrelled fire? =P

[LIFT4POWER]

@sebastianblevdet yes sir!

[sebastianblevdet]

@LIFT4POWER why fire and not controlled air ?=)

[tigolbity200]

why do the big ports go towards the backseat?!

[pvtghost24]

@tigolbity200 i have always wanted to a design like this. I just ran across this video about 10 minutes from me posting this reply to you. The idea of this enclosure type is get the sound of a ported box, obviously lol. By using this design, you are also using the reverb of the other side of the box that turns it into those ports. It's a long simple process to explain..but instead of a giant enclosure for spl, you can use an enclosure like this, by manipulating the reverb producing a big sound

[LIFT4POWER]

@pvtghost24 A huge benefit of this enclosure is to load the driver against dead material such as mdf, hdf, or birch. This allows the sound to load against materials with less give and natural resonances. a noisy trunk lid and body panels color the sound. Its non tapped horn lending a more predictable impedance curve although at tunning frequency we will naturally see a dip.

[pvtghost24]

@LIFT4POWER how much would you charge for this design?

[LIFT4POWER]

@pvtghost24 the copyright or an engineered set of plans?

[strgzr53]

@LIFT4POWER yeah no doubt how much would something like that cost? either you build it and i buy it or you can send me the plans.

[jonwhunt]

Someone please tell me how to calculate the volume for custom shaped sub enclosures! I've just been doing boxes as a hobby but now I have people asking me to do custom REALLY weird shaped boxes and trying to tell them which sub would work best in the box volume created. If that makes sense lol. Would be great if there was a device that could figure it out somehow =(

[lickerauto]

@jonwhunt Easy, get packing peanuts from UPS and a 1ftx 1ftx 1ft box. Fill the box then dump into the enclosure. Repeat until you get the volume!

[staiper1]

This cabinet can be "looked" at few different ways.

In fact this is one kind of serial tuned 6th order bandpass design (technically same system as dynacord PWH) ..

This one is "folded" (as W bin) so this makes cabinet depth more acceptable/manageable than standard PWH models.

[kevynknevik]

hey lift...have you ever checked out bill fitzmaurice designs of subs on here...if so let me know what you think...

[LIFT4POWER]

simple horns nothing different than what they were doing 30 years ago.

[garciaf20]

im soon buying 2 alpines type x's n im looking for box designs anyone kno any wesites i can design box where it shows mehow to tune a port....LIFT4POWER u think u can make me a design with measurements?

[dustinallen1982]

RE Audio has a nice box designer, also you can get programs such as bass box pro that you can use to design subs with

[LIFT4POWER]

Thanks!

[RunTMCfan]

Lift,

I'm checking out your vids. I like this design but it's not your best. It's really a ported box in a box. For home audio this would be killer cause enclosure size doesn't matter so much.

Is there really a benefit to the dummy chamber? I doubt it's tuned...It has some wow factore though.  That chamber to me replicates a trunk. Like a rear firing sub in a trunk but this enclosure is the trunk.

I wish I could sketch on a computer. I like your vids dude. I'm an enclosure whore.

[spartan887]

its not a "dummy" box, its a bass reflex box. and there is a point. altho many argue there is none, its called google...

[RunTMCfan]

It being a ported box makes it a bass reflex enclosure. Not the chamber being fired into.

Long before google there were books. I think the bass reflex design was invented sometime around WWII, maybe earlier. Think I'm kidding? I think Band Pass enclosures were invented in the 40's.

The guy who made this sketch and vid didn't think I was dissing him so why so butt hurt dude?

[axs307]

you're right dude.. there are no new designs only new comers!!!!

[dnwndls]

I think the dummy chamber helps direct the soundwaves the opposite way, so that it is like more concentrated

[LIFT4POWER]

Its not a dummy chamber. Its preloading against the tunning freq for specific applications. This is not for a car. It is used in multiple units for club or theater use.

[RunTMCfan]

I kind of felt that it wasn't for a car if you read my first post. I could see this working for sound reinforcement for sure.

You could call it a number of things. It could be considered a wave guide. Sort of. Either way your vids are sick dude.

[MrElectroman3]

Wow

[killer23irapper]

sweet

[LIFT4POWER]

THANKS

[BLU3Fi5H]

Very nice box design! Very well done.

[probefanas]

what is this song? I luv it

[ferrari1292]

my shooter (dub) by Groove Cutter

[NeonAerox]

whats the music?

great design! soundstream? my favourite!

[probefanas]

what is this song?

[ferrari1292]

My Shooter by Groove Cutter

[LIFT4POWER]

iTS DESIGNED FOR A SINGLE 18" TUNED AT 30HZ, ITS DESIGNED TO BE COUPLED BY 2 OR 4 OR 8 AND SO ON....THE GOAL OF THE DESIGN IS TO OFFER CONCERT/ ENTERTAINMENT WITH THE LOW END PUNCH AND EXTENSION.

[soberbills]

what are each chamber tuned to?

Bills

[LooseCannon48]

Is that some kind of 6th order bandpass.