Thanks for the offer, but what we would need to stay in production is a confidence that there will continue to be tubes available in production volume quantities. The 6DN7 supply has been rocky in years past and has gotten even thinner as of late.
It has been asked if there will be a replacement amp that will work with the rather demanding power requirements of orthodynamic headphones. We are working on some ideas (Kaiju would be killer, but I digress). It's certainly not insurmountable, in fact the challenge is that there are many different ways to go at this. We want to try a few before we decide the best approach. Whatever we come up with will not use 6DN7s, and at this point I'm thinking it will use something readily available instead.