Audax PR170M0 vs PR170Z0 vs PHL1120
 

I will be using one of the above for my next active system and I was just wondering which one I should chose?

I like the Audax's for there higher efficiencies and lower prices but i like the PHL for its higher Xmax. But will the xmax really come into play when crossed over (4th order) at ~350hz? I also hear that the Audax 170M0 has foam that could rot over time. Is this true?

(it would also be alot easier to flush mount the Audax's round frame then the PHLs frame)

Also, when looking at the audax SPL/freq graphs, I don't understand how they rate the driver at 100dB. From the graphs, the average SPL seems to be in the 95dB range.

> Grtare xmax useful at 350 Hz?

I doubt it

What is your upper cuttoof?

For an active system the sensitivity issue is minor.

Sound quality - it's hard to tell the 1120 and PR170M0 apart.

I haven't tried the 'Z' PR.

The PR17 is cheaper than 1120.

The 1120 has more xmax that you don't need if you cross it
over high and it has more power handling {rating}.

If you want to double your power handling you can try the
1160 but I think the sound quality is just a hair lower than 1120,
but you can abuse this one more.

Yeah, I see that the 1120 has a higher power rating, but the P17 being 3-4 dBs more efficient, should be louder. Is this right?

In my experiance a pair of PR170MO's a channel are kick ***. Crossing over at 350 with an active crossover will deliver serious clean lifelike output and dynamics. ;)

The paper cone PR17 is where i'd be. Yes the foam gaskets fail over time, even if hidden away in their original box for 20 years.

Fortunately it is a flat surround, so replacing it with felt or cloth is easy.

dave

between the 2 audax's the MO is easier to work with. In particular the ZO can be considerably better than the MO -IF- it is being driven by an amplifier with a high output impeadance, otherwise it sounds a little "constricted" (sometimes a LOT more constricted). (btw, it also takes a LOT longer to break-in.)

IF you are worried about foam rot from the MO then consider a damping compound (to apply to the surround) that has UV protection. I think Lambda Acoustics used this stuff on their surrounds - so you might try contacting Nick to find out what the product is. (and I have NO idea what his website is now..)

http://www.stryke.com/ John J. bought Nick's remaining inventory so he might know.

thylantyr, still have a bunch of Apollo's? I'm looking for T/S specs.
sheldon

Another vote for the PR170M0s. For what they cost, they are easily the best mid for high sensitivity applications.