These are going to need an insanely efficient speaker--I don't run any 300b amps but the Lamm ML2 which can make more than enough power for my needs and sounds great at around 18 watts per chassis. I'm running a horn/hybrid that is nominally 104db efficient. Based on Atkinson's measurements this produces very little power at 8 ohms. What do other implementations of the 300b tube normally produce in terms of power?
New Western Electric 91E 300B Tube Integrated Amp REVIEW !