[versus rider]

Anyone tried these in open baffle, I plan to get a pair for a Le Cleac'h 160Hz horn but thought I would make an adaptor to fit them in place of my current 8" drivers. I have heard good things about them but not in open baffle.
http://www.falconacoustics.co.uk/audax-pr170m0-17cm-midrange-mhd-17hr37rsm-17hr37tsm-pr-17hr37-pr17hr60-pr17hr70-pr17hr100.html

[Russell Dawkins]

Amusing that they refer to it as a woofer when it so obviously designed as a midrange driver.

[rick57]

all drivers in an open baffle imo should sound a littel better, as there is less stored energy

that's subject to there being enough Xmax for the dB and Hz.

Linkwitz has a spreadsheet to input Sd, D and Xmax and calculate the dB at different Hz.

[versus rider]

that must be the seller calling it a woofer as the description says its a midrange. If you find that amusing then you are easily tickled.

[JohnR]

What's your planned crossover frequency? I think they'd work fine - I can't remember why I used the B&C drivers (similar specs overall) instead but the Audax look fine and they've had good reports. You'll need woofers that will go up fairly high.

[versus rider]

with the current set up of open baffle alpha's, I would be trying them at 250-300Hz up to 1500Hz.The Alpha's are just not good above 300Hz. At present I run them at 180Hz and crossover to an 8" OB, I then have three different settings on the DEQX up to 700Hz, 1000Hz and 1500Hz, jury is still out on the best of those. Above the 8" is a tractrix horn with BMS 4592ND mid drivers and then a 1000Hz tractrix from 6000Hz up. The plan may be to run the bass horn I am building up to 300Hz, then the audax in a Le Cleac'h 160Hz horn, 400hz tractrix and 1000Hz tractrix. Much depends on the quality of the bass horn. I may be totally happy with the audax in OB and call it a day. From what I have read some favour the Audax in OB, so looking forward to trying some.   

[JohnR]

I can't comment on the use of any driver in a horn-loaded configuration, but if you were looking for 200 Hz and lower in an OB than I'd be inclined to get something with lower Fs. So... given that, I can't help wondering why you want to replace the 8" you have - ?

I crossover from my woofer to mid at 800 Hz. Everything (drivers and baffle) just worked out well there. A fair bit higher than I had initially expected.

[versus rider]

I find the Alpha's sound muddy above 300Hz where the vocals kick in. My plan is to have one driver to cover 300Hz - 1500Hz about 2.5 octaves. Of course I am really talking front loaded horns here. As I use the DEQX as an active crossover and for driver correction I can bend the rules slightly. For example my baffle is only 60mm wider than the 15" drivers but I've had comments like " the bass from these drivers in such a small baffle defies the laws of physics " which is why the emerald physics work so well, so they say, as I've never heard them myself. I am thinking I can try the Audax drivers in the baffle before the 160Hz horns are finished.

[JohnR]

Oh, don't get me wrong, I'm all in favour of DSP for OB! My concern would only be the limited Xmax of the driver as you push it lower. 300 Hz should be OK - I'd be interested to hear how it works out

[versus rider]

will keep you posted

[versus rider]

its been a while since I posted on this thread and I still haven't bought the PR170MO, I have though bought a pair of Audax AP170MO, a much cheaper driver, in fact £28 for a pair. They are absolutely superb and I am running them from 200Hz -1500Hz, they are only 85db ( I think ) but with some digital corrections and eq they work well with my Alpha's and 113db horns. These drivers have fs of 117Hz so not good as woofers, more upper bass/midrange.

[JohnR]

Not heard of those before, that driver looks well-suited to the task, esp for the price 

[versus rider]

Not heard of those before, that driver looks well-suited to the task, esp for the price 

yes John, well worth a try, they have transformed my set up. In fact I have raised the cut off for my horn to 1500Hz allowing the audax to cover the critical band 300Hz - 1500Hz. For those running passive and a single amp it may not be as simple.