45 years of experience tells us that the best sounding 'push-pull' amplifiers use 'ultralinear' output transformers. Our 6V6 Ultralinear is based on several 'classic' circuits, but refined by our audio engineer of many years experience. Why the 6V6? This is basically the ancestor of the EL84/6BQ5, but with a much larger glass envelope. As such, it runs cooler, lasts longer, and has less microphonics. The amplifier uses an enormously powerful toroidal power supply, protected in a real potted case (not a dummy one as many companies use). Output transformers are massive and feature the extra set of windings that ultralinear circuits require--and are handwound in our own factory. Parts are chosen for the best possible sound quality--not because we want to impress you with 'boutique' names. Each amplifier is beautifully hand assembled and tested. To maintain the superb sound, there are no adjustments to be made--ever. Self biasing, no AC or DC balance to adjust. And made with the fewest parts possible and best sounding tubes.