Pass Labs products will not be sold in areas where there is already an authorized dealer.
The X350.5 is the natural progression of the X350. Changes include improvements to power transformers, paralleled high speed/soft recovery rectifiers, improved AC EMI filters, more paralleled power supply capacitors, increased supply RC filtering, refinements to the front-end input circuits, and the addition of single-ended Class A bias circuits for balanced single-ended Class A at low power levels.
All of these changes bring the X.5 series closer to the sonic signature of the XA series amplifiers.
The X.5 series feature the distinctive front panel meters indicating the level of current running through the output stages that have long been the visual signature of X amplifiers.
The X350.5 accepts both single-ended and balanced inputs.