This has been a very trying week.
When three customers get their brand new Moniques and call you with problems, it is time to react very strongly.
Without a defective Monique to look at (I should have waited) I decided that there must have been a mis-wiring. Made some sense - new physical configuration of the proven Monique - the problem must be me.
Turns out that some of the latest batch of 6SL7 tubes have badly soldered wiring in the pins that stick out of the base of the tube. It passes a burn-in fine. As long as it isn't physically moved all is well. Ship it and a variety of nasty failures can occur. In addition, I have identified that I must change from the JJ EZ81 tube rectifier to the EH EZ81 because of failures during burn-in and for two post burn-in customers (one in Portugal).
While waiting for the problem Monique to arrive I called in my most able engineering mentors (three actually) for brainstorming. From that came the idea of boosting Monique's output so she could drive a PA power amp. Nice feature. Bad idea.
Monique puts out 0db from Line Out. From the balanced XLR Out she puts out -14db. She sounds incredible that way. To increase the output another 40db would mean changing Monique significantly. She would not be the same.
I like her the way she is and I've been contacted by several customers this week who have very strongly suggested that I do not change her. I won't. While in this effort, I did identify an XLR balanced buffer change going forward, but this will only make only Monique easier to connect to other devices.
The only good part of this failure caused by tubes, and delay for my customers, and long hours of work this last week is that I have found that I have a community of support stronger than any I could have imagined. We all create what we believe in, but to find that others are anxious to create right along with us is a wonderful feeling I can not begin to describe. But you are musicians - you know what it's like.
Thank you.