95 dB, using 300b on 8900 has sufficient volume for me, using 2A3 (under 3 watts) is limited to jazz and not full blown sound level to my taste and I sit about 8 to 9 ft away from the speaker in an approx. 500 Sq ft room
Ok. I have tannoy hpd315 . I am wondering if the bass will be controlled with 300b . Listening space maybe 6m x 8m