Subwoofer, Water Pipe

I thought I might share my ground breaking subwoofer design with you all, I hope you find inspiration!

I recently purchased a 12" Kenwood sub and started reading up on Theile and Small parameters, frequency response curves, material densities and methods of avoiding cancellation and high frequency resonance issues.

Finally I took inspiration from the sub itself:
It is called a Kenwood KFC-W300s; clearly it required mounting in a 300mm Bucket!
The enclosure is double skinned 1.5mm thick PVC (Two buckets, one inside another). The mounting holes were machined out with a kitchen devil and the sub secured in place with 8 cable ties,
The pouring spout provided excellent access to the coil for the speaker cable.

Total construction time 20min
Total cost ₤3.96



https://static.flickr.com/37/82201703_d0ab65ab80.jpg?v=0



https://static.flickr.com/37/82201701_2ac9abdd74.jpg?v=0

so how is it?

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blah blah blah blah

That is what you would call true Macgyver workings...

But how does it sound?

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Vehicle: Mazda B2200 1989 X-Cab
Audio System:
1. (2) MTX TA3401
2. (2) MTX Thunder 7500
3. (1) MTX TA3202
4. Eclipse Fujitsuten SC8264 Component series
5. Pioneer Premier DEH-P770MP

It doesnt sound as bad as you might think.
It drops off before it gets to the really low notes]
Some tunes the Bass sounds tight some it booms.
Its the first Sub i've made so i dont have a lot to compare against, but i've heard worse that cost a lot more.


I have plans to build a better enclosere, My dad works in water distrobution, they lay alot of 12" PVC wate pipe, the walls of the pipe are over half an inch thick, the stuff is designed to take emormas pressure so i recon it will make a goog dense sub tube, hopefully he can get an off cut for me.

I built the bucket so i could get my amp and wiring in ready.
I've also replaced the front door speakers with some new Alpine 13cm two ways, I think i need ome crossovers for these, but havent looked into that two deeply yet.

Funny how you start off needing a new head unit cos you lost the front off the last one and before you know it half the interior panals of the car are lying on the pavement(sidewalk) and you cant stop fiddling with wires and filters.

Any sugestions on good cost effective pasive crossovers I can mount in the doors?

Haha, thats just too funny. I'm sure as long as its within the air volume specs. for that sub, you'll be fine. Really, you did'nt come up with something new. But more improvised by the stuff you would use laying around the house. In my mind, I think you are just recreating a bazooka tube.

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Vehicle: Mazda B2200 1989 X-Cab
Audio System:
1. (2) MTX TA3401
2. (2) MTX Thunder 7500
3. (1) MTX TA3202
4. Eclipse Fujitsuten SC8264 Component series
5. Pioneer Premier DEH-P770MP

I like the zip ties holding in place, thats classy

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double-secret reverse-osmosis speaker-cone-induced high-level interference distortion, Its a killer

Hi All
Some of you asked me to post some pics when I had completed my sub enclosure. I finished it this evening:
Its made out of 12" high pressure water main, Which happes to be uncanninly, exactly the right dimensions for the Sub. the sub is a Kenwoof KFC-W300s
I took pics of the whole process.

This is the off-cut of pipe as it came. The sub is just sitting in the top. perfect fit, very Jammy


The walls are 20mm thick dense PVC plastic


Woked out from the internal diameter, to get the required 28.3 liters, (Enclosed), I would need 480mm of pipe + 20 mm for the MDF end cap.

I used maskin tape to get a dead streight line at both ends




Then cut the pipe with a wood saw, this took the best part of an hour, its like cutting hardwood
Here it is cut capped and sealed with silicone


Then cut and fitted the carpet, wired and assembled.





The Finished product




This is my first attempt at a Sub enclosure, I think it looks prety Stock. It certainly beats my tempory Sub in a plastic bucket solution.



The frequency response is much flatter (I can tell because i dont have to change the balance every time a new track comes on) and the Bass is a lot less boomy.
thanks to those who have advised over the last couple of weeks.

Well you win the ingenious box award, as for the sound quality award, that's yet to be seen...

are those your blue slippers in the back ground ? oh and nice bass tube with the carpet it looks very professional and it costs way less than a bazooka tube which i think are for old people anyway but a sealed tube should sound way better for trunk applications

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the best part of a job is seeing the bumper get smaller over the horizon

I built the speaker in my girlfreinds bedroom, they're here shoes, I prefer somthing with more of a heel.

The tube looks good, ive seen those prefab bass cannons, but that one is heaps koolier

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Clarion DB36MP
Infinity Kappa Perfect 10"
Respone 800w Mono
ALPINE MRP-F250
*Custom fabrications*

Great idea,  you might  consider stuffing it with fiber fill , other than that I think its a great ,cheap system ingredient.

nstaller36695 wrote:

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are those your blue slippers in the back ground ? oh and nice bass tube with the carpet it looks very professional and it costs way less than a bazooka tube which i think are for old people anyway but a sealed tube should sound way better for trunk applications

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Hey I Have A Bazooka Tube grrrrrrrr an it hits hard u hater!!grrrrrrrr and the bazooka tube wit built in amp is pretty sickk IM 15 I have a bazooka tube an ur callin me old