Don't waste your money, even on a low quality CD/Dac combo the improvements are noting to write home about and forget using it on a higher end CD/Dac combo. Iv'e tried on both and with the lower end combo it seem to give the higher freq. a cleaner sound but took a something away from the bottom end making for a non musical sound. For the higher end CD/Dac combo it was a disaster. I have tried the Sonic Frontiers and the Monarchy, both of which I sold weeks later. This is just the results with my system, however there are many that use and like them as mentioned above. I'm not trying to knock these units as they have sold many but I don't think they are the answer. A bit off topic but if your looking to do some upgrades that won't break the bank you may want to consider a few dedicated lines or look into room treatments as these two things will get you real improvements.
