SSD 18 sealed, Win ISD thoughts

[GLN305 0]

I really want to buy a pair of ssd 18's and run them sealed, but everyone on this site say no. I plugged the T/S specs into Win ISD and it seems to be OK sealed in that sense. Qts is very high at 1.22 in 4 cubic feet. Here's what I have text-wise:

25.00 -9.42 -9.42

30.00 -5.73 -5.73

35.00 -2.66 -2.66

40.00 -0.28 -0.28

45.00 1.32 1.32

50.00 2.18 2.18

55.00 2.50 2.50

60.00 2.51 2.51

65.00 2.37 2.37

70.00 2.18 2.18

75.00 1.99 1.99

80.00 1.80 1.80

85.00 1.63 1.63

90.00 1.47 1.47

95.00 1.34 1.34

100.00 1.22 1.22

Of course in a larger sealed enclosure it looks much better as well as in a large ported enclosure. Is it possible to get away with running this sub sealed and for it to sound good and play low?

[NDMstang65 403]

I highly suggest not doing it, regardless of winisd says it honestly does not sound right...

But if you feel like going for it then do it, you've got to listen to it not me

[SeductiveSounds 0]

Get something smaller and use the same size enclosure and port it.

[///M5 2,833]

Why would you use the SSD for that instead of the Q? If your goals are lows in a sealed enclosure at least use the sub that is designed for that implementation.

[95Honda 486]

Qts is very high at 1.22 in 4 cubic feet.

That is a pretty high system Q, it will probably really exagerate the 50-70Hz range in car.

If you want to go sealed, go with a driver designed for it, like everyone else said.

BTW, the school of though that sealed = tigher bass, better transients, more accurate is all BS. This just comes from people who haven't been around a properly built ported box, because there are a crapload around. Sealed alignements are easier to get right, that makes them easier for the novice, but never, ever discount the sonic potential of vented alignments.... The MOST expensive loudpeakers in the world generaly are vented if they aren't servo driven, if that tells you anything... I'm talking like the $100K stuff.....

[GLN305 0]

I'm very familiar with high system Q's and exaggerating frequencies, so that's a valid point and I was worried about that. I am going to order the Q, but I was just curious what you guys thought about this sub. Thanks for all the input, I really appreciate it.

[GLN305 0]

Qts is very high at 1.22 in 4 cubic feet.

That is a pretty high system Q, it will probably really exagerate the 50-70Hz range in car.

If you want to go sealed, go with a driver designed for it, like everyone else said.

BTW, the school of though that sealed = tigher bass, better transients, more accurate is all BS. This just comes from people who haven't been around a properly built ported box, because there are a crapload around. Sealed alignements are easier to get right, that makes them easier for the novice, but never, ever discount the sonic potential of vented alignments.... The MOST expensive loudpeakers in the world generaly are vented if they aren't servo driven, if that tells you anything... I'm talking like the $100K stuff.....

I wasn't particularly worried about "tighter" bass not being present in a ported enclosure, I just really wanted to use a pair of 18's instead of one

Going with vented I can only fit a single 18", but I'm really OK with that...I mean a single 18" should work nicely for SQ or for SPL alike.

It's funny that you mention the most expensive speakers having ported designs because my all time favorite speaker is the B&W Nautilus and it's ported and sounds extremely accurate and clean. Giving that example is usually my way of clearing up the ported versus sealed debate lol

[GLN305 0]

Why would you use the SSD for that instead of the Q? If your goals are lows in a sealed enclosure at least use the sub that is designed for that implementation.

I planned on using the Q, I was just plugging sub specs into Win ISD and it seemed to have a high Q with a relatively normal FR curve in about 4 cubic feet. Kinda seemed like it might work in a sealed box. Of course specs don't tell you how it's gonna sound LOL