Info: old ESS crossover

FORNO · 23rd January 2010, 11:30 AM

Hello,

you know what is the cut frequency of the crossover in original ess amt 1 A monitor ?

thanks for any help

stavros · 23rd January 2010, 05:27 PM

I HAVE INFO FOR THE
ESS AMT 1D
Fcross=800 HZ

stavros

FORNO · 24th January 2010, 04:55 PM

Thanks stavros,

I think the AMT 1 A monitor are cut to about 1000, but I want confirmation.

stavros · 28th January 2010, 05:15 PM

Ok forno
here some photos from ess amt 1a measures

1.cross schematic
2.cross measuring freq (theoterical=800, measuring=900-1000 hz)
3.imp and phase measurings
4.ess amt-1d info

stavros

ATatum · 31st January 2010, 04:14 PM

Its great to find a place where folks still appreciate the AMTs, and have very helpful information about them.

I am still using a pair of AMT-1bs for my main system speakers, and smaller ESS performances for surround. All I have ever had to do was refoam the AMT-1bs about 10 years ago.

I am setting up system in the basement for exercise distraction with a pair of AMT monitors that had not been used for a while. One of them now has lost the high end, but the AMT seems fine.

I clearly have a crossover problem, so the question is: Should I just troubleshoot the crossover looking for what is likely to be a bad/old cap, or should I just do a cap job on both of them. I figure if one goes, another is getting ready to go somewhere else, but since my AMT1bs are still kicking fine, the cap jobs may be overkill.

Also, does anyone have the schematic for the AMT monitors?

What could go wrong when you pull everything apart?

Any help or suggestions would be greatly appreciated.

el seven · 5th April 2010, 06:19 PM

Yes, a cap job is in order. I have the AMT Monitor schematic for you.

ATatum · 21st April 2010, 03:02 AM

Thanks, el seven, that is great. It is what I figured would do the trick. Do you have any recommendations on what flavor of the caps would be best?

Jonathan Bright · 21st April 2010, 04:57 AM

While on ESS stuff can anyone supply details of x-over for the smaller, single sided version. It was NOT a dipole and ran a bit higher I think. Thanks.

HARDGRAVES · 23rd April 2010, 07:54 AM

Quote:

Originally Posted by Jonathan Bright

While on ESS stuff can anyone supply details of x-over for the smaller, single sided version. It was NOT a dipole and ran a bit higher I think. Thanks.

Part number from the amt and /or physical dimensions or what speaker system it was out of ??

CSS/XBL · 23rd April 2010, 12:31 PM

Hi,

Please note that ESS is back in business and so information, support, spare parts, etc. as well as new product is or will be available.

ESS Speakers

Bob

23rd January 2010, 11:30 AM	#1
FORNO diyAudio Member Join Date: Dec 2009	Info: old ESS crossover Hello, you know what is the cut frequency of the crossover in original ess amt 1 A monitor ? thanks for any help

21st April 2010, 04:57 AM	#8
Jonathan Bright diyAudio Member Join Date: Feb 2004 Location: Queensland	While on ESS stuff can anyone supply details of x-over for the smaller, single sided version. It was NOT a dipole and ran a bit higher I think. Thanks. __________________ "It was the Spring time of the year when aunt calls to aunt like mastodons across the frozen waste." P.G. Wodehouse.

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23rd January 2010, 05:27 PM	#2
stavros diyAudio Member Join Date: Jul 2004 Location: Greece - preveza	I HAVE INFO FOR THE ESS AMT 1D Fcross=800 HZ stavros

24th January 2010, 04:55 PM	#3
FORNO diyAudio Member Join Date: Dec 2009	Thanks stavros, I think the AMT 1 A monitor are cut to about 1000, but I want confirmation.

31st January 2010, 04:14 PM	#5
ATatum diyAudio Member Join Date: Jan 2010 Location: Upstate NY	Its great to find a place where folks still appreciate the AMTs, and have very helpful information about them. I am still using a pair of AMT-1bs for my main system speakers, and smaller ESS performances for surround. All I have ever had to do was refoam the AMT-1bs about 10 years ago. I am setting up system in the basement for exercise distraction with a pair of AMT monitors that had not been used for a while. One of them now has lost the high end, but the AMT seems fine. I clearly have a crossover problem, so the question is: Should I just troubleshoot the crossover looking for what is likely to be a bad/old cap, or should I just do a cap job on both of them. I figure if one goes, another is getting ready to go somewhere else, but since my AMT1bs are still kicking fine, the cap jobs may be overkill. Also, does anyone have the schematic for the AMT monitors? What could go wrong when you pull everything apart? Any help or suggestions would be greatly appreciated.

5th April 2010, 06:19 PM	#6
el seven diyAudio Member Join Date: Jul 2009	Yes, a cap job is in order. I have the AMT Monitor schematic for you.

21st April 2010, 03:02 AM	#7
ATatum diyAudio Member Join Date: Jan 2010 Location: Upstate NY	Thanks, el seven, that is great. It is what I figured would do the trick. Do you have any recommendations on what flavor of the caps would be best?

23rd April 2010, 12:31 PM	#10
CSS/XBL diyAudio Member Join Date: Oct 2003	Hi, Please note that ESS is back in business and so information, support, spare parts, etc. as well as new product is or will be available. ESS Speakers Bob

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