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AMT : new player in the game
AMT : new player in the game
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Old 26th December 2009, 03:19 PM   #1
mige0 is offline mige0  Austria
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Default AMT : new player in the game

There are only very few AMT available for DIY - ESS, Eton, Mundorf, Beyma, Aurum Cantus (?) - and all are insane expensive given the easy construction.

Here is a new one from Harwood Acoustics called "AM 25 AIR MOTION" - welcome !

hifisound eShop * -* HARWOOD ACOUSTICS AM 25 AIR MOTION * A
Click the image to open in full size.


Seems not much more data available at the moment except a short test in a German magazine where shown data (CSD in particular) look even a little bit better.
Low distortion even up to high levels not exactly on par to competitors but almost

Michael

Last edited by mige0; 26th December 2009 at 03:37 PM.
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Old 29th December 2009, 01:04 PM   #2
Telstar is offline Telstar  Italy
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It looks very good in the Q/P department.
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Old 29th December 2009, 05:20 PM   #3
mige0 is offline mige0  Austria
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In the mentioned magazine there are two other AMT form Harwood Acoustics advertised called AM30 and AM35.

They are bigger (150x110mm 180x100mm), have increased sesitivity (~1dB ~2dB), increased power handling (100W 120W) and more are expensive (plus EUR 100.- 200.-)

Didn't find any additional data for those...


Michael

Last edited by mige0; 29th December 2009 at 05:23 PM.
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Old 29th December 2009, 08:40 PM   #4
Borat is offline Borat  United States
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Quote:
Originally Posted by mige0 View Post
all are insane expensive given the easy construction
i agree. they should sell for $20 a piece.
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Old 29th December 2009, 09:02 PM   #5
Telstar is offline Telstar  Italy
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Some AMT must be assembled by hand (Procide, Mundorf).
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Old 8th January 2010, 11:38 PM   #6
paulfx is offline paulfx  United States
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Default AMTs by Hand

...and of course there is nothing wrong with that!
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Old 9th January 2010, 07:14 PM   #7
mige0 is offline mige0  Austria
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Quote:
Originally Posted by Telstar View Post
Some AMT must be assembled by hand (Procide, Mundorf).
what parts of the AMT could that possibly be - and - how much time would that steps actually consume ?

I mean
- usually you have the magnets plus top and bottom plate
- the diaphragm in its frame plus glued terminals

anything else?

Last edited by mige0; 9th January 2010 at 07:33 PM.
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Old 9th January 2010, 09:54 PM   #8
Telstar is offline Telstar  Italy
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The membrane IIRC. I saw a couple of those that "came bad".
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Old 9th January 2010, 10:04 PM   #9
mige0 is offline mige0  Austria
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The membrane in the frame that surrounds it or the membrane aligned in the motor?
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Old 9th January 2010, 10:14 PM   #10
tinitus is offline tinitus  Europe
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AMT : new player in the game
Harwood, do they make those drivers
Theres several Fountek and Hivi sold by other companies with different name
Some may be OEM designs from production speakers
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