The 12pw is more a 7" driver, judging by the cone area. The shallow cone and being based on a full ranger driver hopefully allow higher crossover points. This makes it a fairly unique driver for its size
Unfortunately there are no off axis measurements I can find; personally find that frustrating. Hence I've chosen the lowest X/O point (for the ribbon)
I remember Jeff B saying that a dip off axis at 3khz is not a real issue (or something along those lines) so not too concerned
Unfortunately there are no off axis measurements I can find; personally find that frustrating. Hence I've chosen the lowest X/O point (for the ribbon)
I remember Jeff B saying that a dip off axis at 3khz is not a real issue (or something along those lines) so not too concerned
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8". See for example this one. If they can do it I don't see why not a full range.
H1288-08 CA22RNX
Incidentally, what I have is this one.
H1597-08 FA22RCZ
Similar in many ways to the Alpair except it has a whizzer cone.
Oon
H1288-08 CA22RNX
Incidentally, what I have is this one.
H1597-08 FA22RCZ
Similar in many ways to the Alpair except it has a whizzer cone.
Oon
I find with wide dispersion 1" tweeter coming in from 8" bass, it sounds a bit bright. It's because there is a bit of a hole in the midrange energy there, especially off-axis from the bass. You can't do anything about it except slope the tweeter response down and that is a poor compromise. So I dunno.
I think its worth trying the single coil on the bass. Your tweeter filter certainly looks like 3kHz XO. But since you asked, I wouldn't be able to resist trying 1.5mH and say, 6.8uF shunt on the bass for some proper rolloff. Or even the off-the-shelf 3kHz XO values of 1mH and 10uF.
Marco_Gea was nearer 2kHz here, but the same two way idea really:
http://www.diyaudio.com/forums/multi-way/147632-classic-monitor-designs-25.html#post4428857
I think its worth trying the single coil on the bass. Your tweeter filter certainly looks like 3kHz XO. But since you asked, I wouldn't be able to resist trying 1.5mH and say, 6.8uF shunt on the bass for some proper rolloff. Or even the off-the-shelf 3kHz XO values of 1mH and 10uF.
Marco_Gea was nearer 2kHz here, but the same two way idea really:
http://www.diyaudio.com/forums/multi-way/147632-classic-monitor-designs-25.html#post4428857
That tweeter will not do well with a first order slope at 3k.
I hope that you have measurement equipment.
System 7, I would not call it a wide dispersion tweeter due to it being waveguide loaded.
That said, when implemented correctly, they do sound very nice. I've heard them in a couple designs and also own a pair.
I hope that you have measurement equipment.
System 7, I would not call it a wide dispersion tweeter due to it being waveguide loaded.
That said, when implemented correctly, they do sound very nice. I've heard them in a couple designs and also own a pair.
2nd order acoustic or electrical?
2nd order electric will result in a 3rd or 4th order acoustic slope, which may require you to use more than a single coil on your woofer for a smooth transfer function and phase tracking.
http://www.heco-audio.de/en/test-reviews/heco-direkt
Another speaker worth looking at with similar design philosophy.
Another speaker worth looking at with similar design philosophy.
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