Best repair people for my Threshold 400a?


400A upgraded to e/stasis circuit by Threshold.Has stopped working, I can still send it to the New Threshold Co.now located in Texas or do I send it to Jon Soderberg? Any thoughts or suggestions would be most helpful.
Thank you.
rjkern1
If you are anywhere near Toronto, Canada there is a fellow Dan Santoni who does tremendous work. Has worked on my Thresholds, only person I trust. DTS Audio,
Thanks for the help everyone. Since I'm in the US I'll get in contact with Jon Soderberg ASAP. JD
Jon worked on my Threshold 400a. He was as mentioned by others, knowledgeable, courteous, and very prompt. I would not send my Threshold anywhere else.