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DIY Speakers and Subs > Build something comparable to SVS PB13-Ultra?
notslow's Avatar notslow 03:31 PM 02-07-2010
I might have stumbled across something that is close to the PB13 in size and performance here:
http://www.hometheatershack.com/foru...slot-port.html

Pros, cons? Also, if I wanted to go slightly larger box (6-6.5cf) and use an AV15 is there any reason I couldn't use a slot port design instead of the PR? This would reduce cost substantially, but would there be a trade off?

A9X-308's Avatar A9X-308 03:55 PM 02-07-2010
Quote:
Originally Posted by notslow View Post

I might have stumbled across something that is close to the PB13 in size and performance here:
http://www.hometheatershack.com/foru...slot-port.html

Bigger cone and more Xmax from the look of the surrounds, I reckon the Tempest would easily best it.

Quote:
Originally Posted by notslow View Post

Pros, cons? Also, if I wanted to go slightly larger box (6-6.5cf) and use an AV15 is there any reason I couldn't use a slot port design instead of the PR? This would reduce cost substantially, but would there be a trade off?

Sure you can use an AV15, but I'd increase to port area (and the length to match) to get the port air speed lower. With 190L box, same 19" width you'd need 2.5" port height and 70cm/28" length. Assuming 1kW amp.
collin's Avatar collin 09:25 PM 02-07-2010
Quote:
Originally Posted by A9X-308 View Post

Bigger cone and more Xmax from the look of the surrounds, I reckon the Tempest would easily best it.

Sure you can use an AV15, but I'd increase to port area (and the length to match) to get the port air speed lower. With 190L box, same 19" width you'd need 2.5" port height and 70cm/28" length. Assuming 1kW amp.

what frequency is this slot port tuned for?
A9X-308's Avatar A9X-308 04:11 AM 02-08-2010
Quote:
Originally Posted by collin View Post

what frequency is this slot port tuned for?

Fs 24Hz, port length ~70cm.
19Hz is 120cm.
I just ran a quick sim in Unibox.
notslow's Avatar notslow 07:14 PM 02-11-2010
Does the AV15 need a bigger box than the Tempest? Which one is the better sub?
A9X-308's Avatar A9X-308 07:54 PM 02-11-2010
Quote:
Originally Posted by notslow View Post

Does the AV15 need a bigger box than the Tempest?

That will depend upon the tuning.
Quote:
Originally Posted by notslow View Post

Which one is the better sub?

Better? In what regard?
notslow's Avatar notslow 12:04 AM 02-12-2010
If I want to tune to 15hz. which one would need a bigger box? Which one would have better output, more linear frequency response?
A9X-308's Avatar A9X-308 03:46 AM 02-12-2010
You should get a modelling program and work that out for yourself.
alpenpoint's Avatar alpenpoint 06:31 AM 08-30-2012
Hi,

Sorry for my bad english. wink.gif
Here are so good Subwoofers in this Forum and i am also interest to build a Subwoofer who is so good or better than a SVS PB13 Ultra. Have you Tips for me?
Who has build a comparabel Subwoofer?

Alpi
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