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Old 19th June 2006, 06:37 PM   #11
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Quote:
Originally posted by john curl
Nelson, do you have any idea what it would be?
Here's what I got. The bandwidth is really quite good,
considering, and I don't think I would try to do too much to it.

(Ignore the low frequency performance here)

I like the Mangers - they tend toward the neutral side compared
with other full range drivers, but are less sensitive, and with that
comes less dynamic range with the little amplifiers.

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Old 19th June 2006, 06:59 PM   #12
EUVL is offline EUVL  Europe
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> I like the Mangers - they tend toward the neutral side compared
with other full range drivers, but are less sensitive, and with that
comes less dynamic range with the little amplifiers.

Could not agree more.


Patrick
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Old 19th June 2006, 07:01 PM   #13
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Nelson, what microphone did you use? Was it a B&K?
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Old 19th June 2006, 08:07 PM   #14
Tenson is offline Tenson  United Kingdom
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Nelson, I take it that was on-axis?

I head the Manger Zerobox 109 with the ASR Emitter II and it was very dynamic. Thats the reason why I was aiming for the max power the driver can take.
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Old 19th June 2006, 08:51 PM   #15
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Default Amp Bandwidth

My speakers are very different than Mangers, but do share some traits. Mine are very high inductance, much higher impedance, and efficiency. They roll off above 12K.
With this low rolloff, they still show positive sonic gains when driven by an amp with a 300 khz top end versus a 40 khz.
I had felt that since the top end was rolled off on the speakers, anything over 25 khz was not audible. Very wrong. This is one of the design goals of Spectral, Mhz bandwidth.
My example of a 300 khz amp, the ancient Le Monstre. Capable of 100Khz square waves. Works great with Lowthers.
This top end even comes through when driven by CD, and its 20KHz top.
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Old 19th June 2006, 09:35 PM   #16
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Quote:
Originally posted by john curl
Nelson, what microphone did you use? Was it a B&K?
ACO, on axis. It checks flat to 40 KHz.
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Old 19th June 2006, 10:34 PM   #17
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ACO is OK, I'm pretty sure. 1/2" or 1/4" pressure or free field? I have a pair of ACO 1/2" pressure mikes, so I'm curious. For the record, you are most probably very correct in your measurement, but I am going from original theory given by Manger. It could be something else that is creating the very fast rolloff, rather than an intrinsic property of the driver (ideally). Just curious.
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Old 20th June 2006, 06:03 PM   #18
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It's the 1/2" ACO. I say it checks out flat to 40 KHz insofar as
the same test setup shows a sharp 45 KHz rolloff with the
Pioneer ribbon which supposedly makes it to 100 KHz. I have
a couple of 1/8" mics from B&K, but I haven't taken them out of
the box yet.

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Old 20th June 2006, 06:37 PM   #19
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Sounds good, Nelson. I was hoping that the ACO mikes really met specs, as I own a pair of ACO 1/2" capsules, myself. The 14us measured risetime matches up pretty well too.
I used to have a pair of those Pioneer tweeters, myself, but they were lost in the firestorm of '91. They really DID go out there, but have you ever looked at their time response? It is very strange, like it went though a phase shifter. At least, that is what I saw, years ago.
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Old 20th June 2006, 06:41 PM   #20
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Fascinating as this conversation is, we are drifting slightly off topic...
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