Subwoofer using multiple smaller drivers

[oon_the_kid]

Try this one from AAD Hifi:

http://www.philjonespuresound.com/PJWeb13_PSW1.aspx

Oon

[chris661]

Ok - so we're going for sealed box here...

have a look at http://sound.westhost.com/linkwitz-transform.htm

I have tested a Linkwitz transform circuit, and it works very well.

I'll have a look at that driver, see how much power you'll need to get to 25Hz is a (fairly) small box.

Ok - 11dB gain for 25Hz, @-3dB in a 30L sealed box.

more like 14dB gain in a 20L box.

download for the spreadsheet is on the below link...

http://sound.westhost.com/download.htm

have fun

If you have any questions about how to use the spreadsheet, just ask.

General rules of thumb - long throw and high power handling (so you can equalise - remember this needs a fair amount extra power) low resonance, as this helps the original (un-equalised) frequency response, thus reducing the amount of equalisation required.