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Old 20th February 2006, 11:12 AM   #1
oylore is offline oylore  Norway
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Default ESS amt 1 am crossover

I havce a nice pair af ESS amt 1am (1982 mod). There is a problem, when testing I can see a 9 db dropp in frequency at about 11 - 12kHz. Have even testet the AMT alone with same result. See picture

Is this normal? Do I have to rebuild someting? (change the Heil diaphragm)(rebuild my crossover?)

Is there any one who have a scematic for a new crossover?
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File Type: jpg venstre_farfield_48khz_pulse.jpg (79.8 KB, 301 views)
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Old 1st February 2011, 09:22 PM   #2
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Default AMT1am crossovers

Does anyone have information on how to update the crossovers in these tall two-way speakers? I am looking for a drawing and the best brand and size of capacitors to change. One of my heil treeters is not as loud as the other one and I suspect their is a problem in the crossover network. Both speakers have the latest new Heil ribbons so that is not the problem. Thanks.
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Old 1st February 2011, 10:40 PM   #3
49 - for the 16th time
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There are other post about crossovers for the ESS drivers - use the search function. A couple of years back one of the guys posted these xovers for use with his Peerless woofers. I hope that this will be of some help.
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File Type: pdf AMT Crossover Schematic 05-17-2009.pdf (22.8 KB, 115 views)
File Type: pdf AMT Crossover Schematic with PHL woofers.pdf (22.8 KB, 83 views)
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