andrew: you made me do this

[mike c]

if the cost was the same, which would you choose:

DIY sealed with Maelstrom-X

Fs: 17.1 Hz
Le: 0.87mH
Re: 3.1 Ohms (Voice Coils wired in parallel)
Qms: 6.88
Qes: .43
Qts: 0.40
Mms: 442g
Cms: 0.19 mm/N
Vas: 383L
Sd: 1182 cm^2
Vd: 7.8L
BL: 18.6
X-max: 33mm
X-mech: 40mm
Pmax: 1500W
88.4dB/1W/1m

OR

SVS PB13Ultra

15hz
http://www.avtalk.co.uk/forum/index.php?t=msg&th=22952&start=0&rid=14&SQ=1189180431
10hz
http://www.avtalk.co.uk/forum/index.php?t=msg&th=22954&start=0&rid=14&SQ=1189180431

anybody familiar with winisd or other simulation software care to give the pros and cons of each?

e.g. will the sealed 18 have better 10hz output?

 

[avaserfi]

The Maelstrom-X seems to model with slightly higher 10Hz output than the SVS measured in a 6 cubic foot enclosure with 1500 watts. This in no way equates to real world performance as it would require making the assumption that the Maelstrom remains linear in high power/exucursion situations which cannot be known without proper measurements.

 

[mike c]

6 cubes and 1500 watts? im guessing that's a DIY ultra, right? or is that two ultras?

 

[avaserfi]

6 cubes and 1500 watts? im guessing that's a DIY ultra, right? or is that two ultras?

Those specifications are referring to the modeled Maelstrom-X cabinet as compared to the measured stock SVS Ultra you linked.

 

[mike c]

OH, i get it. it's the maelstroms in those boxes. right.

6 cubes = approx. 2 feet per side + - an inch or two?

you were saying PEQ on the low end ... can the DCX apply PEQ's? (how many PEQ bands does it have?)

and how much "slightly higher" output does the sealed MX have over the Ultra (im guessing you were comparing it to the 10hz tune)

 

[mike c]

new Ilkka sealed tests 200L and 75L enclosures
http://www.hometheatershack.com/forums/subwoofer-tests/12195-tc-sounds-lms-5400-18-sealed-75l-vs-200l-special-test.html

seeing how the LMS driver in a 200L box is only louder by 1-2db and when THD limited only louder by 2-3db ... i think i'll go for SVS instead.

going sealed would require me this time to buy a router/jigsaw, put in manual labor, and have the finish done by a third party ... i think ill buy an extra SVS subwoofer to make up for the lost SPL instead

EDIT:

looks like the sealed units in the above link wasn't really optimally EQ'ed to produce the low end ...