Fosgate from Musical Surroundings
The Signature tube power amplifier uses two EL32/6CA7s per channel, as well as two 12AX7s in the input stage and two 12AU7s in the driver stage, and has both 8 and 4 ohm taps. Output tube bias is "easily adjustable," thanks to built-in LEDs and bias controls for each tube. Frankly, anything would be easier than bias adjusting the KT88s on my former Jadis DA-7 Luxe (successor to the Defy 7). That gorgeous animal required me to remove umpteen screws on its bottom plate, turn the 5 million lb behemoth on its side, work with a plastic screwdriver to spare the planet of fried Serinus, and use my advanced mathematics skills and lots of patience to move tubes around, socket by socket and row by row while averaging the bias of the three tubes in each row to create a "best of each row" optimal bias scenario. I loved the sound, but not the hassle.