[blizzisu]

I can pick this up used locally for $75. http://www.edesignaudio.com/product_info.php?t=2&products_id=36 Here are the specifications:

Qts: .36
Qes: .42
Qms: 3.0
Fs: 23.00Hz
Re: 7.0
Vas: 254L
Mms: 202.0g
Bl: 22.10T*m
SPL: 91dB
Sd: 872cm²
Xmax: 21.0mm
Voice Coil: 62.5mm

Would this subwoofer work well in a sonotube setup? Are there new subwoofers that can be had for under $150 that would work just as well? I was thinking about using an 18" sonotube with about 200l of volume tuned to 18hz or so.

 

[Mike P.]

It would be pretty hard to beat that for $75. There's a build in the Database that is a a bit bigger, 326 liters tuned to 18 hz.

http://www.hometheatershack.com/forums/diy-subwoofers/9265-members-diy-subwoofer-database.html

 

[Mike P.]

Is this for HT and what will you be powering it with?

Here's the SPL graph. 200 liters tuned to 18 hz. High pass filter at 16 hz. 900 watts input power. Xmax reached at 30 and 13 hz. One 6 inch port 28.75 inches long. Air speed is maximum 24 m/s at 17 hz.

 

[blizzisu]

Thanks for modeling that Mike. I have modeled it as well. This would be for 100% HT usage. I am not very familiar with other drivers out there, so my question is, would I be better off going with a new driver? Or is this 16Ov.2 at $75 a good deal?

I would be powering it with whatever I can find on the cheap, but I would obviously like something along the lines of a Behringer EP1500.

 

[brandonnash]

A buddy of mine got this driver when it was on special. I built a sealed box in his Toyota Tacoma extended cab and with a large amp he maxes out my spl meter on a lot of frequencies. Nice driver. Can get very loud. That with 500 watts would be good. It has thermal limits of somewhere around 800 watts rms I think, but I am probably wrong on that. All I can say is build it and you won't be disappointed. May want a bigger enclosure though. May be able to squeeze in a couple more hz at the bottom of the spectrum.

 

[Mike P.]

$75 is a good deal. Grab it while you can.

 

[blizzisu]

Am I correct in assuming that in order to prevent max cone excursion from occurring I will need to use a Behringer DSP 1124p or a similar device? What is the cheapest DSP out there that includes a high pass filter and will allow you to equalize your sub?

 

[Mike P.]

Reckhorn B1 would be my choice. It has a variable HPF and will boost the voltage to the EP1500 if that is an issue with your receiver. $100 from CSS.