Did my preamp short kill my Mark Levinson amps and Infinity Beta servo ?

Tried that....with two different power amps, once of which had a volume control i could slowly turned up output before trouble.   Same loud ...and I mean weapon of mass destruction loud...even blew off the dust cap on the servo wired woofer....with same results.

I had both sequentially....and simultaneously.....  turned on the servo unit and amp for 25 years and nothing like this ever happened.   Infinity warns of this horrible output if the servo feedback not working properly.

I will get the servo fixed as well has hopefully find someone to test the active woofers before hooking it all back together.

@jerry_b2 I had that issue with my Betas before.  Change the switch on the back of the Servo controller to 0.  I also had custom (shorter) control cables made.

They work great.

I want to update one of my Servo Controllers but have not found a suitable shop.

Thanks.  Will look into that.....however, the servo unit was given a clean bill of health as it worked in another beta set up with no issues.  It might be something bad happened to the one servo-controlled/feedback woofer in one of the columns as the horrible noise only came from one side.   The dust cap was blown off that woofer. 

@jerry_b2 , So.....who manufactured your preamp? After fiascos like these, all brand loyalties would be out the door, I'd think.

The pre-amp was a vintage (about 25 years old) Klyne.....which I believe is an absolutely wonderful solid state pre-amp for the price point and for my level of "audiophileness".  It was repaired and is back to sounding great.  I blame myself more than a component failure.  My hope is to have my kids sell this at my estate sale someday, so I probably should have done some preventative maintinence that others have suggested on this forum for high end equipment that they plan to keep for decades.  It was a reasonable repair cost.  So if I die soon enough, it still might have been the most cost effective.  There is a clear pyrex like top to this unit.  I did notice that there was some "fogging" over one of the boards before it died....actually at least a year before it died.....so probably my bad not sending it in before it had full cardiac arrest.