Best repair people for my Threshold 400a?

Jon Soderberg. He was a tech at the original Threshold corporation, he has matched parts on the shelf, he’s professional and has probably seen every issue there is. Everyone I know who has had him repair, or modify their gear have been quite happy with his work.

I moved several months ago. I was very careful in moving my Threshold 200.

Once hooked up it was dead. I called Jon he was extremely helpful, had me 

remove the top panel, that exposed four fuses toward the back of the unit, one 

obviously blown. I replaced it and the unit works fine. I would definitely call him,

he was spot on with what to try prior to shipping it to him for repair. Best of 

luck, love these amps.