Subwoofer for closed box

[Andreas11]

Does anyone knows a subwoofer driver ( 8" or 10" ) which i can use for a closed box with a F3 of 30 to 35Hz ? Or a suggestion close to my requirements.

 

[d1030180]

Maybe you could consider some Scan-Speak woofers. They often have very low resonance frequency which is necessary for your low f-3 requirement.

Here's some models to get started, too bad at least one of them seems to be discontinued:
25W/8565-01
http://www.scan-speak.dk/datasheet/archive/25w-8565-01.pdf
25W/8565-00
http://www.scan-speak.dk/datasheet/pdf/25w-8565-00.pdf
23W/4557T00
http://www.scan-speak.dk/datasheet/pdf/23w-4557t00.pdf

 

[Andreas11]

Thank, i will consider the three.

Bij de way:

hifisound eShop - SCAN SPEAK 25 W 8565 01 CARBON/PAPER U

 

[Inductor]

Just adding some info to d1030180.
The 01 can't go lower than 40Hz (f3).
The 25W/8565-00 can't go lower than 35Hz and needs a ~double size box comparing with the one below 23W/4557T00.

 

[Andreas11]

I use Boxsim and that gives me 31.9 liter bij 45.5Hz (0.707)

Also looked at petoindominique.fr and that gives me 73.6 liter bij 37 Hz (0.707) or 53.7 liter bij 38 Hz (0.8)

 

[Richard Ellis]

Confirming simulations here with WinISD beta 0.44 for the Scan Speak
Sealed Qtc .71, 68.9L, -3.1 DB @ 39.12 Hz.
But look at this....as the EBP is at 52.77... this splits the usage down the middle for sealed or ported.

Ported 130.2 L, Fb 22.63 Hz, F3 ? -3.06 Db@23.89 Hz, 102mm Diam, 286mm long.

The thing is, the sealed design starts a slow roll-off at 100 Hz, while the ported starts a faster roll-off at 40 Hz.
If you can cope with the larger enclosure, I would opt for the ported type.
Given that this driver has a generous 13mm of Xmax.......I would port it.

______________________________________________________Rick........

 

[norman bates]

I don't know of any 8" or 10" with an F3 sealed around 30hz.

I'd assume that the spl would be around 80db 1w/1m if it does exist.

Norman

 

[norman bates]

d1030180, you are right.

the last sub you linked to 23W/4557T00 (82db, lol) Has a Fsb = F3 = 31.6hz in a qtc .707 sealed (1.6ft3 or 36 L).

 

[d1030180]

Yes, the sensitivity of 23W/4557T00 is very low indeed. I remember reading an article about this driver and it was mentioned that a powerful amplifier is required to successfully drive this woofer. The article was in some car audio -related magazine.

 

[fastbike1]

JBL GTO 804 will do F3 34 sealed in 20 liters.

Dayton RSS210HF-4 will do F3 36 sealed in 28 liters.

Watts are cheap.

I know it's not an 8 or 10, but the Inifinity 1260w will do F3 32Hz in ~40 liters sealed.

 

[djk]

A 2 cu ft 2nd order sealed box with an F3 of 30hz can only be 0.18% efficient (84.55dB).
A 2 cu ft 4th order vented box with an F3 of 30hz can only be 0.36% efficient (87.56dB).
A 2 cu ft 6th order vented box with an F3 of 30hz can only be 0.90% efficient (91.54dB).