best subwoofer for a 20 litre ported enclosure?

[Bill poster]

Spent days(!) researching the best sub for a 15 to 22 litre enclosure. Using WinISD. Want low, clean, tight bass, f3 of 30 hz or below if possible, 85 db/ 1M minimum. Hopefully this list could help anyone looking for something similar so please add any suggestions

shortlist so far

10" Dayton Titanic III

10" TC Epic

10 " RE Audio SRX

12" DIYMA reference

[Bill poster]

8" Elemental e3.8 (f3 35 hz 17 litres)

[Cokewithlime]

There is no such thing as best - lol, but this Tang Band W8-1363B 8 inch Subwoofer will get you a solid f3 of around 30Hz and a f10 of about 23Hz in just a 17l ported enclosure

[Bill poster]

I know, 'best' is not really the right word jeez are those figures right?

[sreten]

Hi,

The basic rules are simple, for a given box size, the lower the real sensitivity
the better the bass extension. For 15L to 22L vented your looking at an 8"
driver, most 10" would only work well with sealed in that range.
TBH 10"sealed with a bit of low EQ might be your best bet.

You need a better simulator than WinISDbeta for final design,
and anyway always use two to crosscheck the final design.

rgds, sreten.

[toref]

Originally Posted by sreten

Hi,
You need a better simulator than WinISDbeta for final design,
and anyway always use two to crosscheck the final design.

rgds, sreten.

Sorry if OT, but I'm curious. What do you find limiting with WinISD beta w.r.t. simulation? Which is the "preferred" SW for this?

Regards, Tor

[Bill poster]

SB acoustics SW26 10"
optimum volume is VERY low on the 4 ohm - (12 litre) but i don't understand the 8 ohm specs, very different, don't make sense when inputed on winisd

https://www.madisound.com/store/prod...oducts_id=8682

[Bill poster]

https://www.madisound.com/store/manuals/SW26DAC76-4.pdf scroll down

ok I made a mistake, it works now- the 8 ohm in a 15 litre BR measures around 34 hz (F3) and F6 of 28 hz. Pretty impressive.

edit madisound have got different specs to the SB website. sensitvity is 82 not 86!!

[sreten]

Originally Posted by toref

Sorry if OT, but I'm curious. What do you find limiting with WinISD beta w.r.t. simulation? Which is the "preferred" SW for this?

Regards, Tor

Hi,

WinISDpro is better as it allows you cross check published parameters
and model excursion limits, powerhandling limits etc. Other sims are
better at modelling e.g. stuffing and flared ports (I think).

I use WinISDbeta for quick sims, WIONISDpro for more detailed
analysis but I would cross check that in another sim for a final
design. The FRD tools site has Unibox and a Bass box designer,
I don't know them very well, but they some have nice features.

rgds, sreten.

[sreten]

Originally Posted by Bill poster

https://www.madisound.com/store/manuals/SW26DAC76-4.pdf scroll down

ok I made a mistake, it works now- the 8 ohm in a 15 litre BR measures around 34 hz (F3) and F6 of 28 hz. Pretty impressive.

edit madisound have got different specs to the SB website. sensitvity is 82 not 86!!

Hi,

I don't understand how you can arrive at a 15L vented box for that driver.
For 15L sealed box Q is around 1, you cannot effectively vent Qb=1.
Qts of 0.52 means sealed for a compact box, with Vas of 44L, that
indicates around 30L(1cuft) sealed (and well stuffed) will get you
near the classic Butterworth Qb=0.7 alignment, just above in Q.
I'm fairly certain its intented use is 1cuft well stuffed sealed.

For vented around 60L (2cuft) tuned very low (18/20Hz) is what i get.


edit : sorry I've used the wrong driver data ........
Ok ... Fs 20Hz, Qts 0.27, Vas 46L .....
Yes that does make sense in a 15L box.
But note with such a small box the vent size will be so difficult
to dimension your will be forced to go with one or two PR's.

rgds, sreten.