Any Tech heads in the house?

[themainjam 10+ year member]

http://sound.westhost.com/project48.htm

i cant understand all of this article but i did understand that this guy got a 15" to 120DB (at least) with a cheap speaker and 400W (RMS?) and was down to 15HZ without blowing the speaker?

so if anyone is interested and would like to share their thoughts jump right in. (or maybe just explain a little)

Click to read more...

 

[JimJ 5,000+ posts]

it's a sealed setup...you don't have to worry about the woofer unloading like you do with a vented system. It almost seems like an electronic way to "cheat" using a bigger box, like a full size TL or something.

 

[themainjam 10+ year member]

so would it be "legal" in a comp? or do you think you could push it farther then 140 DB?

hmmmmm

 

[JimJ 5,000+ posts]

why would you use it in a comp? The whole point of the system was to extend low-frequency response, for an audiophile HT system...not exactly something you'd want in a comp setting. You'd want the opposite, actually...less low frequency response to waste energy at 45 Hz or wherever you'd be burping the subs at.

 

[somekook 10+ year member]

this guy got a 15" to 120DB (at least) with a cheap speaker and 400W (RMS?) and was down to 15HZ without blowing the speaker?

... VERY easily done. sealed box.

sealed boxes are pretty much a joke in comps, when you can gain ~3 decibels from a ported box. low frequencies arent what kill a sub. low frequencies in a ported box are what kill a sub by sending it psat its mechanical limits. in a sealed box, i can play 3 hertz all day. not that you could hear that or anything.