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Discussion Starter #1 (Edited)
Pretty smooth, looks like cone breakup at 5khz.



Decay 800hz.

Decay 1200hz.

Decay 1600hz

Decay 2000hz.

Decay 3000hz.

Decay 5000hz.

Distortion 50hz.

Distortion 60hz.

Distortion 80hz.

Distortion 200hz.

Distortion 800hz.

Distortion 2000hz.

Distortion 3000hz.

Distortion 4000hz.




Pretty good bl curve and efficiency. The suspension throw is quite high, in fact the highest I've seen for a 7" driver. Look at the Klippel KMS curves... at 15mm p-p throw the suspension is barely stressed. Unfortunately the voice coil clearly leaves the gap quite noticeably at high outputs. In any case the bass performance is quite good with respect to total output.

Read the sticky in this forum on how to interpret the data, and do a comparison to the other drivers here. The AC is not a bad unit, but neither does it really stand out in any way. I liked the bass output and efficiency, but not the higher 3rd order distortion at 3khz and up.
 

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Over a narrower bandwidth (ie. 60hz - 2.5khz) it looks like a pretty decent driver. What is the price on these guys? Love the ribbons I have heard from AC.

Neil
 

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I want to get my hands on one of these just to see what suspension goodies it has. Too bad the motor is so generic.
 

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not sure what to think about all of these 7" XBL drivers having suspension-related issues, huh?

They perform well compared to the competition. It's not uncommon to have 3-4mm of linear suspension travel. This one however is truly linear. In all of our tests for 7"s this one is special in this respect.
 

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funny that the coil runs out of gap before the suspension even starts complaining, I believe that would make a higher failure rate on drivers due to the surrounds having to take a beating to stop over-excursion.
Meh, I doubt the surrounds will ever come apart. The motor looses omph rather quickly. It takes exponentially more power to push it out of the gap. There is some truth to this. It seems to me the suspension is always offset forward, if it is offset. Perhaps on top of it's duty as a restoring force it also acts as a hard brake to prevent damage. Not in this design though.
 
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