very low Q woofer

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#41
Bringing things back on topic, a Q=0.5 highpass acoustical response is critically damped. Lower Q is overdamped. Higher Q is underdamped -- it will ring. SL uses a low Q woofer in a slightly overdamped enclosure but he uses EQ to shift the acoustical response to Q=0.5 at 20 Hz which is critically damped. It doesn't matter much how you get there -- driver + box + EQ. All that matters is the final acoustical response of the whole system.
 
#42
Always hard to compare 'because all things are never equal',
but given the choice between two woofers (bass for a 3way, sealed cabinet)
1. Qts 0.2, Le 2.4
2. Qts 0.4, Le of 1.4

Which would you go for? The lower Q or the lower Le?
 
#43
Ap said:
Always hard to compare 'because all things are never equal',
but given the choice between two woofers (bass for a 3way, sealed cabinet)
1. Qts 0.2, Le 2.4
2. Qts 0.4, Le of 1.4

Which would you go for? The lower Q or the lower Le?
Click to expand...

I'd never buy a driver based on those 2 specs alone unless it was a super cheap one. Please provide more info, but a Qts of .4 requires a box that's over 6 times bigger. Also, if you're going without a sub and you have a nice wide range mid, then you could restrict your woofer to the low stuff and get away with the kind of woofers with the higher Le's.
 
#45
When one is considering ultimate damping in such detail,one should also consider if the relevant driver has enough Vd to cope with SPLs required.

Personaly i aim for low distortion also
-id get a woofer with shorting rings and low distortion efforts..rather than an everyday 'average' price woofer.
eg: peerless xls 12" etc

Cheers!
 
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