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Multi-Way Conventional loudspeakers with crossovers

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Old 2nd May 2013, 08:07 AM   #351
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Interesting.

Did you ever conclude btw, if rear tweeters are required for such high xo frequency?
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Old 2nd May 2013, 11:35 AM   #352
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I can not say I reached a firm conclusion. With the NaO II switching the rear tweeter on or off makes a huge difference, but the tweeter comes in at 2.2k Hz. With the Note II I really can not hear much difference at all, at least in my room. But I have curtains on the front wall behind the speakers so that likely has an impact on the higher frequencies. In a room with a more reflective front wall, like in the photo posted previously, it probably make a bigger difference. Better to have it and let the listener experiment as to whether he likes it on or off.
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Old 2nd May 2013, 11:56 AM   #353
al2002 is offline al2002  India
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JohnK,

Can you comment on the effect of lowering the tweeter crossover frequency to, say 5kHz or even 4kHz? How is the polar response affected? Do you start to see blooming as you reduce the tweeter's crossover frequency?
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Old 2nd May 2013, 12:45 PM   #354
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Quote:
Originally Posted by al2002 View Post
JohnK,

Can you comment on the effect of lowering the tweeter crossover frequency to, say 5kHz or even 4kHz? How is the polar response affected? Do you start to see blooming as you reduce the tweeter's crossover frequency?
Best answered by showing a polar of the tweeter:

Click the image to open in full size.
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Old 2nd May 2013, 12:51 PM   #355
al2002 is offline al2002  India
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P.S:- Looking at distortion measurements on the web, the tweeter's distortion is quite reasonable from 4.5kHz up.
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Old 2nd May 2013, 12:54 PM   #356
al2002 is offline al2002  India
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Quote:
Originally Posted by john k... View Post
Best answered by showing a polar of the tweeter:

Click the image to open in full size.
Very revealing. Thanks for posting this.

Last edited by al2002; 2nd May 2013 at 12:56 PM.
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Old 2nd May 2013, 01:43 PM   #357
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Distortion at levels typical of playback, above the Note Crrossover point, are insignificant.
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Old 4th May 2013, 01:42 PM   #358
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Just a heads up for builders in the UK/Europe. Falcon Acoustics(UK) is now supplying driver sets for the NaO II RS and NaO Note II RS.
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Old 18th May 2013, 08:33 PM   #359
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For anybody in the UK, there is an ebay seller "colosussxb” selling the XLS 830452 woofers for 75 each!

When I received them they had BK Electronics printed all over the box, so perhaps they are getting rid of old stock as I know they use this driver in there XLS200 subwoofer!
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Old 19th May 2013, 06:28 PM   #360
Toaster is offline Toaster  United Kingdom
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BK have been selling at about this price for a few years now.
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