40W Integrated Stereo Tube Amplifier New model of stereo tube amplifiers with DAC's on board, guaranteeing exceptional sonic performance from any digitai source. Made with the finest materials & advanced technology, this series is a sophisticated blend of research & experience. Designed without compromise far a rich sound & faithful music reproduction. The A40Virtus provides a minimum of 40 watts per channel, power output from a pair of KT66's in Ultra-Linear (UL) - push/pull operation. The A40Virtus features a newly designed custom output transformer resulting in a rich sound stage but with an authority that belies its 40Wpc.