Hi Al,
Thanks for the additional specifications, I was relying on information from the Polk website. "If" the tube amplifier has good quality transformers and power supply (PS) I feel the same as atmasphere. This type of tube amplifier using its 4 ohm tap has a very reasonable chance of success. Atmasphere's recommendation for about 20 db of NFB (or thereabouts) makes sense as this would lower output impedance and conversely increase the DF (Damping factor).
Meeting this criteria and the need for quality transformers/PS is the challenge for the stated budget for such a tube amplifier.
Charles
Thanks for the additional specifications, I was relying on information from the Polk website. "If" the tube amplifier has good quality transformers and power supply (PS) I feel the same as atmasphere. This type of tube amplifier using its 4 ohm tap has a very reasonable chance of success. Atmasphere's recommendation for about 20 db of NFB (or thereabouts) makes sense as this would lower output impedance and conversely increase the DF (Damping factor).
Meeting this criteria and the need for quality transformers/PS is the challenge for the stated budget for such a tube amplifier.
Charles