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In the Forum: Audio Discussions
In the Thread: A quest for a better monitor.
Post Subject: Another tweeter and another midrangePosted by Romy the Cat on: 11/13/2009
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 KLegind wrote:
Initially I thought the Zu might be an interesting speaker in the context of tube amplification, however I tried the fullrange driver approach and I have misgivings about it...

Anyhow, the industry rag Hifi World (with whom I have a hate/love relationship) did a review of the Zu a few years ago. The content of said review I think is irrelevant, however there were measurements of the speaker done by Noel Keywood and they showed a much lower sensitivity than advertised. I believe it to be in the low nineties. The frequency response also looked suspect. I see if I can find the review when I get home from work.

best

PS. I do not express any opinion on Zu sound as I am unfamiliar with it. In a certain context it might be good.

Yep, lying about a few dB sensitivity it looks like become a standard practice nowadays.  About the Zu measurements. They have a first order filter in tweeter and it killed some here in the middle of MF, I do not remember where exactly. I did measure what then show in term of response and it was very clear that the tweeter was kicking one octave further then it has to be. There was very characteristic gap between one driver have already rolled of and another did not kick in yet. I played with polarity but it was not the case. If the Zu were my then I would drip the crossover pains at least for half octave but no one know if that horny Zu tweeter will like it. Well, I would use probably another tweeter… of another MF driver that would go an octane of two higher. The low nineties sensitivity is what I would expect from Zu Druid, based upon how they sound, probably 93-94dB. With this sensitivity they need as much “live” from tweeter as they can get, so I understand why they were afraid to drop the tweeter crossover. Probably they need to use another tweeter…. or another midrange…..

The Cat

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