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Old 16th June 2006, 07:05 AM   #31
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The Zu's were measured by HiFi + magazine this month at 95db 1w/1m. Methinks they're being a little selective in where they get that 101db efficiency rating. It might be at one particular point in the frequency range. One very small, particular point. But that's it.
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Old 16th June 2006, 10:14 AM   #32
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Refering to the original question, this one here is using two fullrangers in push-push configuration in an active speaker:

http://www.voice-point.com/

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Charles
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Old 18th June 2006, 11:31 AM   #33
lepain is offline lepain  Netherlands
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Dont use two fullrange drivers in normal configuration. You will never get the drivers close enough to avoid lobbing at mid, and high frequencies.
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Old 18th June 2006, 01:36 PM   #34
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phase_accurate,

The speaker system in the link you just posted does NOT show two fullrangers in use. It shows a 1.5 system in which the back driver only operates in lower frequencies (less than 300-400 hz?). Because the rear driver is not operating full range lobing problems are avoided. So, the advice is still relevant. Do not use two drivers full range, you can't get them close enough to avoid lobing......
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Old 19th June 2006, 06:51 AM   #35
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Quote:
The speaker system in the link you just posted does NOT show two fullrangers in use. It shows a 1.5 system in which the back driver only operates in lower frequencies (less than 300-400 hz?).
Sorry 'bout that. I knew that but forgot to mention. I wanted to show a way of cleverly using two identical drivers but completely failed to mention this detail !

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Charles
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