Impressive lows for non IB

[jeffp]

Wow looking at the graph on this dual RLP15 you'd think it was a IB but it's a ported inclosure.

www.avsforum.com/avs-vb/showthread.php?p=7636611&&#post7636611

Seems impressive at first glance. Love to hear what it sounds like.

[carpenter]

Pretty impressive, it is.

For kicks, I've been simulating 8 Dayton Titanic Mklll 15's in a 100 cubic foot, ported enclosure. Truly amazing... EQ'd I get 129db with 1600 watts power at X-max. The 3db down point is 15.5hz! This box is so large that the sound could be could be similar to an I.B. It has 4) 6" x 7-1/2" ports...

This stuff is just so much fun! ;D

John

[crackyflipside]

This is what my 2 cubic foot SEALED 12" Rythmik Audio sub produces nearfield. It peaks at about 110db @15hz. I would be satisfied with this sub if I just had some more displacement.

The sub gets its flat output from a servo-feedback board. The driver is a TC Sounds dual-voicecoil which one of the coils is the feedback for the servo board and the other coil is to power the driver.