QSX Mark II - The extreme phono (RIAA) amplifier Click on the picture to get a larger view. The front view of the original QSX Amplifier from 1986. Click on the picture to get a larger view. The top v...

QRV-09 - The ultra high performance SMD headphone amplifier Click on the picture to see a larger view of the pcb. The performance is outrageous in headphone amp terms. See the technical data! Interest...

QRV-08 The high performance smd headphone amplifier with quadruple super regulators Click on the picture to see a larger view of the pcb. The performance is outrageous in headphone amp terms. See the...