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[quote="coot"]fishy i dont really have a clue what you just said lol[/quote]

Ummm sorry. Gotta quit speaking engineeringese so much. Guess what I'm saying is WinISD can be limited. Sometimes its best to go with the manufacturers recommendations. I'd say that'd be especially true with Fi. You probably oughta just email em.

fishy i dont really have a clue what you just said lol

[quote="coot"]i have a 15 ssd have not built the box for it yet going to be 4cf at 33hz, but the 12's rms is 800 watts can only running 300 hurt itan anyway? and what does winISD say about the 15 sealed they dont have any recomendations for sealed[/quote]

Does he plan on ever gettin a "better" amp. 300 watts ain't a whole lot these days. I do know that sealed subs in fairly low q enclosures usually reach Xmax pretty darn quick, usually at a lot less than their rated thermal power handling. Still, havin a bit of headroom is always nice.

Gimme a bit and I'll check on the 15.

[EDIT] Both SSD15's seem to be designed for sealed enclosures, but that doesn't mean they won't have some serious output ported. They just may not sound as "good". BTW both SSD15's need 5+ft^3 for a qtc less than .8 which may be why there's not a recommended sealed enclosure. EBP is not the only factor to consider when choosing an enclosure type.

I have not heard any of the RE subs, but i can tell you they are pretty nice products.

i got the hook up on re subs so i am trying to get him to gothat route i know i can get 12" se's for 135 a piece so i imagine the sr are even cheaper have you heard the sr's

That is seriously underpowering that sub, but it wont hurt it. The only way you could hurt it is clipping that small amount of power. Just to be more efficient with his money, I would look elsewhere for a more lower line sub. The RE subs you mentioned, either of them would work... it is just finding them at a decent price because the retail prices on any of RE's subs are rediculous since US Amps bought them out.

i have a 15 ssd have not built the box for it yet going to be 4cf at 33hz, but the 12's rms is 800 watts can only running 300 hurt itan anyway? and what does winISD say about the 15 sealed they dont have any recomendations for sealed

Yeah the SSD12-d1 looks ok in 1ft^3. Its got an EBP of 51.9 which has it leaning toward the sealed side of the equation. You get a Qtc .842. and a Fsc of 49 Hz. Some SQ guys shoot for a Qtc of .707, but that would require 2 ft^3. Anyone heard these guys sealed? 300 watts should be enough power to reach Xmax in a sealed box with that alignment, no? I know the SSD's don't seem to be hailed as SQ subs, but who knows. Its replacing a HCCA 12 after all.

Fi seems to be the flavor of the month. If he's gonna run a sealed enclosure how bout a SSD12?

[url]https://ssl.perfora.net/www.ficaraudio.com/sess/utn;jsessionid=154605a42ee05e7/shopdata/0030_SSD/product_overview.shopscript[/url]

1 ft^3 would probably be perfect. I'm just not sure if they play well sealed. Lemme break out WinISD.