Ernie00,
Here is what I recommend:
Use the tube the drive the top end as you are doing, but get a Solid State amp to drive the bottom end. I highly recommend that you use an electronic crossover in this bi-amp configuration. I am currently using this configuration:
McIntosh MC402 to drive the bottom end of my Legacy Audio Focus 20/20 speakers, Audio Space Nova M-34 tube power amp to drive the top end, with a Dahlquist electronic crossover. I am getting all the bass I want, no need for me to get a stand alone subwoofer.
Here is what I recommend:
Use the tube the drive the top end as you are doing, but get a Solid State amp to drive the bottom end. I highly recommend that you use an electronic crossover in this bi-amp configuration. I am currently using this configuration:
McIntosh MC402 to drive the bottom end of my Legacy Audio Focus 20/20 speakers, Audio Space Nova M-34 tube power amp to drive the top end, with a Dahlquist electronic crossover. I am getting all the bass I want, no need for me to get a stand alone subwoofer.