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Old 26th February 2012, 12:56 PM   #2771
Previously: Kuei Yang Wang
 
Join Date: Nov 2002
Hi,

Quote:
Originally Posted by dvv View Post
Well, you can argue all you like
I am not arguing. I am merely observing that independent measurements have repeatedly shown Audax Drivers to have very high levels of distortion. There is no argument, just an observation.

Quote:
Originally Posted by dvv View Post
but I'm happy with my Audax based speakers.
Whatever floats your boat. But they have VERY HIGH levels of distortion. Again, no argument, merely observation.

Quote:
Originally Posted by dvv View Post
The bass and mid have cones made of their take on the aerogel membranes
The Aerogel Cones where in my view the less successful development by Audax, all with severe and nasty breakup, compared to the much more gentle and very well damped breakup of the woven carbon fibre units.

Not that it matters one iota where it comes to distortion, as the motor assemblies (voice coils, spiders, magnets etc.) are the same.

Quote:
Originally Posted by dvv View Post
I'm not sure what you mean by poor magnetic assemblies
It means poor linearity, high and variable voice coil inductance and many other things that make speaker drivers have high distortion. I should have perhaps said "magnet assemblies of poor design". In fact, Audax drivers are text book case that allows one, should one want to, to illustrate each and every bad practice in speaker driver design that drives distortion up.

Quote:
Originally Posted by dvv View Post
my woofer has a magnet of 3.4 kilos, mounted on a die cast chassis.
And what has that got to do with price of tea in china?

3.4Kg of magnet assembly that create poor linearity (and thus distortion) is as bad 1Kg or 10Kg of the same.

Ciao T
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Old 26th February 2012, 01:01 PM   #2772
wahab is offline wahab  Algeria
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Location: algeria/france
Since there s only four screws i dismonted the bass/medium driver.

It s built specificaly for Quested by Volt Loudspeakers.
The marking is BM220.7 Quested specs.

No trace of THD graph in their datasheet anyway for
current approaching models...



Volt Loudspeakers - Studio Range
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Old 26th February 2012, 01:29 PM   #2773
Previously: Kuei Yang Wang
 
Join Date: Nov 2002
Hi,

Quote:
Originally Posted by wahab View Post
Since there s only four screws i dismonted the bass/medium driver.

It s built specificaly for Quested by Volt Loudspeakers.
The marking is BM220.7 Quested specs.
Ah yes, Volt, they have such a low profile these days, I tend to forget about them.

The BM220 generally has good LF performance, but midrange distortion may also be a little on the high side.

Quote:
Originally Posted by wahab View Post
No trace of THD graph in their datasheet anyway for
current approaching models...
Alas, no independent tests I know of either. So as one of our Dutch contributors has in his sig "To Measure is to Know".

As said, the Panasonic WM61 or the Transsound equivalent linkwitz modified is low enough HD to show up big problems.

Ciao T
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Old 26th February 2012, 02:08 PM   #2774
GloBug is offline GloBug  Canada
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How do you prefer to implement the WM61?
What are you using for a mic preamp?
What is your preference in regards to a stereo mic layout with the WM61?
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Old 26th February 2012, 02:29 PM   #2775
Previously: Kuei Yang Wang
 
Join Date: Nov 2002
Hi,

Quote:
Originally Posted by GloBug View Post
How do you prefer to implement the WM61?
Strictly as measuring mike.

In my case I actually have a Behringer ECM8000 which is the whole thing build into a measurement mike case. So someone else did the job for me. Otherwise check the Linkwitz site.

Quote:
Originally Posted by GloBug View Post
What are you using for a mic preamp?
EMU 1616m or EMU0404USB external sound cards, also provide phantom power.

Quote:
Originally Posted by GloBug View Post
What is your preference in regards to a stereo mic layout with the WM61?
Not use it at all?

The WM61 does not make a good recording microphone IMNSHO.

Ciao T
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Old 26th February 2012, 02:40 PM   #2776
a.wayne is offline a.wayne  United States
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Quote:
Originally Posted by dvv View Post
As for HK, I told you - load tolerance is their very strong point.

My 680, nominally 85/130W into 8/4 Ohms, whacked me with a peak power burst of 512 Watts into 2 Ohms. Since I don't spend my time listening to sine waves at full rated power, I reckon that's quite enough for most people, with most speakers, in most rooms.E

I guess their HCC (High intstantaneous Current Capability) is not just an ad departement catchphrase, rather a piece of Otala legacy.

Yes that HK990 is an serious all in one kit , price reflects it , would love to see sterophile and others incorporating the powercube test as well ...
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Old 26th February 2012, 02:49 PM   #2777
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Quote:
Originally Posted by wahab View Post
No trace of THD graph in their datasheet anyway for
current approaching models...
I was in love with my amp and speakers too... till one day I did look to some headphones measurements and I realized some of them blew away my speakers. I did buy a pair of Grado SR60i just on a whim and now, they are my main stereo listening device.
I do use the speakers still for surround programs (from SACD, DVD-A), but when I have stereo sources... Grado's
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Old 26th February 2012, 02:58 PM   #2778
Pano is offline Pano  United States
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Funny thing about Grado cans. I had read so much about them, seen the measurements and all. So I ordered a pair "sound unheard" off the Internet. Hated them! Thought they would rip holes in my ears. Tried everything that the seller suggested to make them sound better, but ended up returning them. He said it was the first pair he'd ever gotten back.

Did the measurements (and reputation) match the perceived sound quality? In my case - NO. In your case, it seems - Yes. Why the difference?
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Old 26th February 2012, 03:19 PM   #2779
Previously: Kuei Yang Wang
 
Join Date: Nov 2002
Hi,

Quote:
Originally Posted by Pano View Post
Funny thing about Grado cans.

....

Hated them! Thought they would rip holes in my ears.


Ditto. Grado Can's. Make 'em go away.

I'm not hot 'can's anyway.

Ciao T
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Old 26th February 2012, 03:20 PM   #2780
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Location: Virginia
Maybe our ears/brains hear different? As I said, I was weary too about them. Got the SR60 because of the measured response, closer to my prefferences (better IMO even than SR325).
I do love the sound of pure metallic percussion (cymbals, top hat) and clear medium frequency response (voice, sax, trompets). Don't care for hyper bass response - and I know some people that use ONLY that as quality measure.

I guess is a matter of type of music and brain expectations too...
If your brain was used to a lower response in the high-freq part of spectrum, it is used to overcompensate the ear response to that region. Changing the headphones/speakrs to something that is more flat/linear in thar region, will increase the ear signal to the brain for the region. Brain is still over-compensating and mental result is "too bright". Listen a couple of days and your brain will adjust with the new stimulus. Some peopl ewill say that "they needed to be burned-in" - actually their brain needed to be retrained.
I guess only listening a live band can provide a "refference point". But in case of rock, that depends also of the mixing enginner for the live performance.

Last edited by SoNic_real_one; 26th February 2012 at 03:30 PM.
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