also if you own the w4s dacs you need to set the IIR setting to 70k. The explaination of this feature is difficult but its roughly a filter and it is default at >50 so it filters everything below 50 kilohertz out to reduce noise but if you have a good system and would appreciate all detail then set it at 70k. And if you think it wont matter since you cant hear it anyway well....just try it you will be surprised. Kinda like bad rca,s versus good rca,s and how interconnects can make a difference. This IIR is the analog equvilant of caps in line with output signal as filters which is what most people want to avoid or remove from any design since it robs you of SQ. Except IIR is a digital domain filter and not an analog capacitor. DSP is how the Sabre chip works and it stands for digital signal processing. It has nothing to do with home theater or dsp as in the reverb added to audio to give the effect of a studio or theater.Not the same Idea.I told someone once that it used dsp and they said "I dont want a dsp in my stereo" and now they are the biggest proponent of this dac which uses dsp as its processing. And yes I am referring to you Brother. Anyway please try this feature. If you have any questions about any other options on the w4s dacs please ask and I will be happy to help you understand.