Jedinite24, as per articles by Jeff Day and others I would contact Jim McShane, inquire about the NOS 6L6 Russian tube 6N3C-E also known as a 6P3S-E, cost is around $65.00 per quad, very reliable and sound great! I have a quad in my Primaluna Dialogue 1 and they completely transformed that unit. Read Jeff Day Blog, he has them in his Leben amps. Jeff wrote on them at 6 Moons.
