Threshold 400A Amp Schematic.

sulky · 1st April 2005, 07:53 AM

Firstly, I would like to say how impressed I am with this fine forum. Glad to have found this site...

Anyway, I have a Threshold 400A amplifier and I am on a quest to find a copy of the schematics for this unit. I want to give this amp a good checkup and some potential upgrading, a schematic would be very useful in this regard. The amp has two fuses on the rear as opposed to some of these units that I believe have five.

I have searched all over the web and elsewhere and can not seem to find a copy of this classic amps schematic. If anyone out there has a copy, scan, or link to the schematics for this amp and can help me out please respond and let me know.

Thanks !

rtirion · 1st April 2005, 08:01 AM

You can find the schematic here:

http://www.passlabs.com/np/

Try the 400a-4000.tif file.

Regards

sulky · 1st April 2005, 01:39 PM

rtirion:

Thanks for the assistance. I new there had to be a copy around but just couldn't find it. Thanks...

1st April 2005, 07:53 AM	#1
sulky diyAudio Member Join Date: Mar 2005 Location: USA	Threshold 400A Amp Schematic. Firstly, I would like to say how impressed I am with this fine forum. Glad to have found this site... Anyway, I have a Threshold 400A amplifier and I am on a quest to find a copy of the schematics for this unit. I want to give this amp a good checkup and some potential upgrading, a schematic would be very useful in this regard. The amp has two fuses on the rear as opposed to some of these units that I believe have five. I have searched all over the web and elsewhere and can not seem to find a copy of this classic amps schematic. If anyone out there has a copy, scan, or link to the schematics for this amp and can help me out please respond and let me know. Thanks !

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1st April 2005, 08:01 AM	#2
rtirion diyAudio Member Join Date: Nov 2000	You can find the schematic here: http://www.passlabs.com/np/ Try the 400a-4000.tif file. Regards

1st April 2005, 01:39 PM	#3
sulky diyAudio Member Join Date: Mar 2005 Location: USA	rtirion: Thanks for the assistance. I new there had to be a copy around but just couldn't find it. Thanks...

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