=< 10" woofer for FAST with at least 90db

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Looking for good 10" - up woofer for FAST

as a full-range i will be using tang bands w5 2143 - they have aprox 90 db

W5-2143 - 5" Paper Full Range - TB SPEAKER CO., LTD.

Ideally woofer should have more less the same or slightly higher sensitivity.

design will be passive so sensitivity would be important as I am not that keen on "quieten down" FR

max cabinet volume I could deal with for bass would be aprox 80L

ideal F3 would be somewhere around 30-35hz? with solid clean bass up to 250hz

I was thinking about SB acoustic SB29NRX75 but its sens is not as I would like to have , SB34 would need much bigger box ...

Any propositions?

thx
 
No, the AR2 cab is not 75 liters, it is 41.5 liters. with bracing 42-43.

sorry, my mistake. still a great driver for peanuts and I am not kidding.

I use the older one without foam surrounds. They look like rubber but are cloth.
 
=&lt; 10&quot; woofer for FAST with at least 90db

If the woofer is side mounted, the baffle step frequency won't meet the X/O frequency and there will probably be a large dip above the X/O point. That's an issue with using a large woofer and there's only one solution imo
 
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side mounted - in that case you'd be crazy not to use a pair of woofers, one on each side and arranged to balance the forces.\

That's what i like to do.

uFonkenSET-matched-woofT.jpg


dave
 
Consider doing like Zaph did - use a big 4 ohm woofer (or parallel some 8ohm drivers), positioned low on the baffle. This would let you pick from a much larger pool of drivers, and possibly get boom from your 80 litre maximum enclosure. As the FAQ in the link explains, his system sensitivity is higher than the woofer efficiency, due to a low DCR woofer + boundary reinforcement: a big driver near the floor is going to 'feel' boundaries differently to a 4" driver positioned at ear level on a skinny enclosure. Zaph|Audio - SB12.3 3-Way Tower

On paper, the TB W5-2143 looks like a great option for a FAST - good efficiency, robust enough to take a low crossover, good FR (as far as can be seen within the limits of the flatteringly scaled TB graphs). I'm tempted to get some of these drivers myself, so I'm keen to know how they work out for you.

"SB34 would need much bigger box" --> possibly more than you realise.

-They are specified as 0.4 Qts so could in theory suit your 80 litre maximum.
-The Zaph audio project I linked (from 2009) measured his at 0.4443 Qts. He used 107 litres for his box, which models as a Qtc of 0.77. THey'd still be OK in 80 litres.
-I got four newer SB34 drivers, intending to use two per tower. This was scuppered when I measured an average 0.5 Qts, so the optimum sealed box shoots up to about 200 litres per driver.
 
That STX woofer has an unusually high Qts, usually indicating a fairly weak magnet, and meaning it can sound boomy in a normal box (it may be more suited to an open-backed guitar box).

It has a calculated efficiency of 92.9dB, mh-audio.nl - efficiency calc and due to the low Re (2.8ohm), would pull more power from a normal amplifier that the TB W5-2143, giving ~96dB sensitivity (before considering boundary effects). That's probably a little more than you need.

In 80 litres closed box, the STX system Q would be >1 (around 0.7 is usually the target system Q, >1 is not usually advised except in small systems).

The -3dB point would be 55Hz. mh-audio.nl - closed box calc

By contrast, look at using two Dayton Audio DC250-8 10" Classic Woofers per box: they'd be less sensitive, but have a better system Q (less boomy) and lower Fs, in the same 80litre volume.

-efficiency calculates as 87.4dB
-they are 8 ohm nominal, so you could parallel a pair (getting +3dB for doubling area, +3dB for halving Re) for ~93.4dB sensitivity
-System Q would be better, 0.721 in 80 litres (you could go a few litres smaller or larger without much change)
-3dB down point 46Hz
 
By contrast, look at using two Dayton Audio DC250-8 10" Classic Woofers per box: they'd be less sensitive, but have a better system Q (less boomy) and lower Fs, in the same 80litre volume.

Problem is that im based in UK and daytons drivers are not available here.

maybe easier will be just sacrifice some db from FR

what about seas SEAS CA26RE4X
http://www.falconacoustics.co.uk/downloads/Seas/h1316_datasheet.pdf

or maybe even CA26RFX
http://www.falconacoustics.co.uk/downloads/Seas/h1305_datasheet.pdf

or just stick with Sb29?

What do you think guys ?
 
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