There seems to be a LOT of misinformation going around about digital. There are different "types" of DACs. When I say DAC, I'm referring simply to the converter which is a chip that converts digital input to an analog output. In addition to DACs for CD playback, there are different DACs and DAC Arrays for commercial use. Many of the so called improvements in DACs are really just ways of producing cheaper DACs. The DACs used on most mass-produced CD players and portables costs about 20 - 25 cents each. So called jitter reducers may not reduce jitter at all. It depends on the sysytem. Most well mated Transport-Processor systems will have a small enough quantity of jitter so that jitter reducers will have no effect or make it worse. I've measured Theta, Spectral, Levinson and a few others and they all had better jitter numbers without any intervening devices. Any claim to produce zero jitter is not to be believed. The device measuring jitter has jitter itself. It's an anomaly of the digital domain. I remember Robert Harley reviewing the Genesis lens in StereoShill and being shocked that different transports still sounded different with this product. This showed me how little these guys really know about audio.
