they sound awesome. Great SQ and the lowest bottom end of any sub I have ever heard. SQ beats out all competitors. The subs can play frequencies upwards of 200Hz, therefore, functioning as an awesome Sub/Midbass.
Fs is only 1 factor in low frequency extension of a sub, you must also take into account the Qes & Qts. And still box makes a huge difference, typically the bigger the box with a small port tuned low; the lowwer it will hit..
B and Pelon, you're using the word low differently. I agree with Pelon, but understand what B means. A ported sub will unload below tuning and you tune above Fs. Also a ported box requires a subsonic filter. Above tuning, a ported box will play louder than sealed. With a low Fs, you can tune low, but a sealed sub can play a lower than that just not as loud. Example: Arsenal 15 has Fs of 23Hz. Ported box tuned to 25Hz vs Sealed box Play a 27Hz tone, the ported box will be louder. Play a 20Hz tone, the ported box will unload.
Now you take something like a Tumult with a Fs of 15Hz on their 18D2
I've heard 2 15" Arsenals given 500 wrms each in separate 2.5 cuft chambers with 1.5 lbs polyfill in each. They're in my trunk... my order came to $470 Shipped and got here in like 2 weeks... I'm about to get a Orion 2500D for these bad boys and they'll soon be in 3.5 cuft chambers tuned to 28 hz and given ? amount of power... I Don't know a safe limit of power these can take as of now - soon to fine out :D
"Pelon sealed large box would be able to have excellent power handling"
A large sealed box will have lower power handling then a low tuned ported enclosure. The power handling is increased the smaller of an enclosure you go with sealed. The larger you go the closer you are getting to a free air or IB set-up. If power handling in a 1.0 cu/ft is 500 then 500 in a 3.5 cu/ft sealed enclosure will most likely cause the sub to reach over excursion very quickly.
james the sealed sounds so much better. the bass is tighter and sounds more precise. i admit the ported gets louder but to me it just seems like the bass blends in with the rest of the speakers in the car when it is sealed. just my opinion.
yeah Chad I have been running sealed enclosures for the last 3 years. If you tune your sub properly a solid ported enclosure will have better conmtrol then a sealed box. Some people like high tuned (35hz) for SQ, but IMO it really gives you the Boomy effect of the ported enclosure. Where as a low tuned enclosure 25-28hz has great control and sounds fantastic. I am going to run sealed but a nicely designed ported SQ enclosure is a fantastic thing