AudioGal
100+ Head-Fier
For me, "rolling tubes" in my MJ2 has been all about tonal balance, detail and presentation. I ended up with a pair of Raytheon 6BQ7A tubes that gave me a slightly forward mid bass/upper mid and pulled out the bit of congestion in the same area that I was hearing with the stock 6n1p tubes. This has been with Schitt DACs (Modi Multibit replaced by a Bifrost 2) and driving DCA Ether C and Audeze LCD-3 'phones. There are a lot of really great tubes that will fit into the 9AJ pin out and for a lot less money than the insanity that is beginning to overwhelm the 6SN7 world. Just be careful about the required filament current - per Jason, the MJ2 has a regulated DC filament power supply that could go into overcurrent protection mode due to the cold start current of the tube filaments. I did try a pair of 6CG7 tubes and had no issue with start up, even though the filaments needed 600ma instead of the 450ma of the 6BQ7 family, but your mileage may vary.What does either the Reflektor or BRIMAR do more / better different from what I have?