I had the same problem with P Tech. I sent it back, as I don't want anything to do with a Co. that sends out flawed gear out with the intention that maybe the customer's system will not reveal the flaw. And if it does we'll just send him another.
Perpetual Techs P1A DESIGN FLOOR!
MAJOR DESIGN FLOOR IN THE SOFTWARE! DISTORTION! The unit distorts on transients. The company is aware of this and if you call they will ask you to return it, AT YOUR COST, for fixing.Talk to John their tech, ext 305. A floored product, that was sold too soon to unsuspecting customers, my original unit arrived without some of the chasis screws, which I was never able to get from Perpetual, dispite many attempts. They also have over charged my credit card several times. Be aware of young companies in the high end. Audio Alchemy, where are you now??