Advice on a 15"+ sealed subwoofer design

[gwgjr31]

Hi,
I've been searching the web the last few weeks looking for a design that fits my requirements, but I haven't found what I'm looking for yet. I will be using the sub for both HT and 2ch. stereo. I have no size constraints on the sub, but I want it to be sealed. I'm also planning to use active equalization to extend the low frequency response.
I would like to buid a sealed box using either a 15" or 18" woofer. I've already purchased a 1000W plate amplifier for the project. I'd like to limit the driver price to <$300. Ideally the -3dB point would be 25Hz or lower. The current listening room is abot 15'x20'.
With the large plate amplifier and active equalization, is there any reason to build a larger box. With the power ratings of the woofers I'm finding in this price range, it appears that I won't be able to fully utilize the amp unless I build a higher Q box.
Initially I was planning to use an AV15 for the design, but I've had trouble getting in touch with the supplier.

Anyways, any suggestions on box designs or driver selection would be greatly appreciated.

[chainenoble]

good luck!i was in the same boat.the suppliers either don't return you calls or emails or have no stock.i finally settled for the dayton15" titanic and it's seized.woofer will not move.
the only suggestion i can give you is
http://www.soundsplinter.com/
quick and helpful responses.i just couldn't stand that silly "x" on the woofer

[simon5]

Since you're in US, try http://www.ascendantaudio.com

They have many drivers in your price range. Call them, they don't answer much to emails afaik.

If you use active equalization, you need a huge amplifier like you have. In a situation where your driver is using 100W for a 40 Hz sinewave, it might require 1000W with active EQ at 20 Hz to achieve the same loudness.

The size of the box with active EQ is less important, but a larger box will be more efficient so you'll have more headroom with your amplifier.

[dangus]

Have you looked at the Adire subwoofers?
http://www.adireaudio.com/Home/TempestSeries.htm
http://www.adireaudio.com/Mobile/KodaSeries.htm

Here's a US source: http://www.acoustic-visions.com/~aco...by_brand.shtml

[simon5]

These are nice, but backorder since forever or almost.

[tinitus]

I dont know anything about these

http://www.acoustic-visions.com/~aco...rs/index.shtml

http://www.oaudio.com/TC2_PLUS.html

Or else I think Visaton have nice moderate 12" woofer

[tinitus]

Or this "mysterious" Meniscus - they have a 12" and if its any good you could take two pr side

http://www.meniscusaudio.com/speakercomponents/

[tinitus]

WOW! very nice 18" woofers

http://www.bmspro.info/?&show=item&u...66&param=value

[badman]

If I were in the market for a sub..... I'd go with a Koda 15" sealed from www.creativesound.com. Yeah, Thiele Small parameters are unavailable.... but it's XBL^2..... and you can measure T/S parameters to calculate the optimal box size (I say go low-Q and use as little EQ as you can)

[Jussi]

Originally posted by tinitus
WOW! very nice 18" woofers

http://www.bmspro.info/?&show=item&u...66&param=value

Indeed !

There is a 18" model with rather generous +-13mm linear excursion. Not bad for a PA driver. Efficiency is also ok, inductance low, response good up to 200Hz. Any idea of the price?

Jussi