Driver Reccomendation for 5 cubic Foot Enclosure. Home theater use

[permo]

I got a little bored and started putting the cart before the horse. I chopped up a sheet of 3/4 pine plywood and built a subwoofer enclosure to fit a space in my basement. I know that the plywood is not the best. So, I then cut, screwed and glued 3/4 MDF to the outside so I now I have a 1.5 inch thick, 80 pound driverless box.


I already have my mind set on ported. I need a driver. I have 160 watts RMS via audio source amp 100 ready for this project, and a budged of $100 (willing to bend a bit). So efficiency is something to consider here, considering the low power available.

I would LOVE to get to 20 hz at F3 but I understand that this may not be possible. I have been looking at the dayton audio classic DVC 15 but not to happy with that sub in 5 Ft3.


My DIYAUDIO peeps have never let me down!

[Inductor]

5ft³ = 141.58L

ready for this project, and a budged of $100 (willing to bend a bit)

I would LOVE to get to 20 hz at F3 but I understand that this may not be possible.

Hi permo,
All it's possible, but if you start by saying that you have a budget of $$$.00 not feasible then your beautiful project will vanish in thin air. So,
With a $170.00 driver you can get a beautiful 22.5mm Xmax and a horrendous ~60 or 65mm peak to peak and 43mm Xmech (one-way) from the data sheets.

With your project you will have F3=23 Hz in "free field" conditions and F3=18 Hz in your room with a Qtsb of 0.36. You can tune your port(s) to ~FB=18/19 Hz
Stereo integrity HT 15" Dual 2/4 Ohm subwoofer
Stereo Integrity HT 15" Subwoofer - Google Search
Thanks for waiting...

[permo]

Wow............thats an awesome driver. Would 150 watts even begin to drive that woofer?

I was also looking at this:


http://www.parts-express.com/pe/show...number=295-512


The 15 incher you reccomended seems like the winner tho.

[tb46]

Hi permo,

The Infinity 1262W models fine in pairs, and you should be able to find them at a reasonable price (amazon, ebay...).

Regards,

[permo]

Originally Posted by tb46

Hi permo,

The Infinity 1262W models fine in pairs, and you should be able to find them at a reasonable price (amazon, ebay...).

Regards,

Thanks TB! By the way, the TQWT is still performing amazing. It seems like the lower the frequency the more it likes it!

[permo]

picked up a 1260W for $49 shipped...that just seems wrong. So cheap. I am going to plug her into winisd tonight. I am going to reduce the volume of my enclosure to 4 cubic feet with blocking and see what happens in all likely hood. With an FS of 23hz I should be able to get an F3 near 20hz if I tune below FS......wish me luck.

[norman bates]

sealed for a car looks sweet
Qtc .707
VB = 1.28 Ft3
fsb = 42.60 hz
F3 = 42.61 hz

Standard ported looks fine too, I'd use 2 in that 5ft3 enclosure.
vb 2.62 ft3
f3 24.68 hz
tune 24.33 hz

thats some serious 13mm xmax.
You'd need a HUGE port to prevent chuffing at higher volumes.
Use a shelf port so it isn't as long as a standard round port (8" diameter maybe by 36.8" long for 2 driver in shared box).

Nice pick of a driver though for the cash.

[permo]

With bracing, driver displacement and port displacement I got my enclosure right at about 4 cubic feet. Here is what I came up with

4 cubic feet
Tuned to 23 hz
4 " port 13" long gives vent mach of .10. I will flare the port
F3 right at 20 hz.....

Not too shabby for a $49 dollar driver. I should have it up and running in a week. I am fairly confident it will sound pretty good.

[norman bates]

well.............
at what power level ?

Their own paperwork has 1 driver in 2ft3 tuned to 32hz with a 4" port, and you can see the excursion isn't lessened very much at 300 watts. A larger port will lessen the excursion, and it will sound better.

You want to use 2 drivers and tune lower with a single 4" port ?

I don't consider my dual 15" with 8mm xmax (in single box) to have enough port area (4" diameter) for a 27hz tuning................
I've used dual 18's with 4.3mm xmax in a shared box with a 12" port for a 27hz tuning.

But it's up to you.

[permo]

Originally Posted by norman bates

well.............
at what power level ?

Their own paperwork has 1 driver in 2ft3 tuned to 32hz with a 4" port, and you can see the excursion isn't lessened very much at 300 watts. A larger port will lessen the excursion, and it will sound better.

You want to use 2 drivers and tune lower with a single 4" port ?

I don't consider my dual 15" with 8mm xmax (in single box) to have enough port area (4" diameter) for a 27hz tuning................
I've used dual 18's with 4.3mm xmax in a shared box with a 12" port for a 27hz tuning.

But it's up to you.

I am using a single driver. I think the 4 inch port is adequate.