razorpit

Ive been struggling with an Invicta dac for about 9 months, The problem is that when playing red book CDs the music stammers only for a second but enough to spoil the listening experience. I have tried different cables and CD transports but the problem persists, ironically the previous DAC never did that while being a good machine it was not in the same "caliber" as the Invicta. Has anybody else had similar problems?