Audax PR170MO. For those who have moved on.....

It's OK to roll drivers looking for a sound, but I don't do it. I might say yes or no to some. I find we can control what goes toward the sound character so if drivers are capable of doing the job, we can make them work for the speaker, rather than make the speaker dependent on them.

Naturally, we can't do much about breakup so it has to be handled carefully. Normally this means cutting it out completely. One exception might be when crossing to a waveguide and you have to skirt the edge of the breakup region, so your choice of driver can be more critical.

However response variations in the pistonic region are more straightforward to deal with.
 
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I've used that audax mid many times. It does a few things very well but it has alot of breakup hash past 3k, plus it falls apart sonically when pushed hard. Add to this a tiny xmax which dictates a rather high crossover if it needs to play loud ie used in a 3 way with a compression driver. The only exception is when its used with a WG. That really wakes it up.

For me, the B&C 8PE21, 8PS21, 8NDL51 (midbass only), Eminence Beta 8A, Beta 6A and SB Acoustics 6MW150D are the ones I really like.
 

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First order calls for flater drivers to make the long overlapp easier and large bafle to put the bafle step below the mid to keep the filter simple. It is possible than the step above 1k hz with the phl driver is higher and looks like more to tge 17PR17Z0 than the MO which is smoother there. However not sure it can explain the less detailled sound of the Phl (your other post in the system description thread)
 
I've used that audax mid many times. It does a few things very well but it has alot of breakup hash past 3k, plus it falls apart sonically when pushed hard. Add to this a tiny xmax which dictates a rather high crossover if it needs to play loud ie used in a 3 way with a compression driver. The only exception is when its used with a WG. That really wakes it up.

For me, the B&C 8PE21, 8PS21, 8NDL51 (midbass only), Eminence Beta 8A, Beta 6A and SB Acoustics 6MW150D are the ones I really like.
now i realize my op post was missing the context in which i use the audax driver

My system is a passive series 1st order crossover at 300hz and 1.5khz. I cross the audax to a horn loaded ribbon.
 
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However not sure it can explain the less detailled sound of the Phl (your other post in the system description thread)
maybe details is not true.
the most evident aspect with using the phl and the audax, is just how musical the audax is. it will make any music, even stuff i dont like, super interesting.

maybe theres more to a driver then just its measurable behavior?
 
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not the different spider, cone, frame?
Could be one of the answer, as all the other parameters. It seems not to be a drop in replacement but maybe for the low end if TS parameters are very close. You can try smooth manual massage to break in the spider but I would not risk it due to the low 1,5 mm xmax... The more reasonable seems to conclude they are different beasts, so resell the Audax.
 
Could be one of the answer, as all the other parameters. It seems not to be a drop in replacement but maybe for the low end if TS parameters are very close. You can try smooth manual massage to break in the spider but I would not risk it due to the low 1,5 mm xmax... The more reasonable seems to conclude they are different beasts, so resell the Audax.
I prefer the audax over the phl, i think you have misread lol

both pairs are used so break in is not in play!

thx !
 
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