MSB Link DAC III vs. CAL Sigma


I'm seeking opinions on which DAC would best suit my system, the CAL Sigma with a Telefunken 12AX7 tube installed or a stock (unmodified) MSB Link DAC III. My system currently consists of an Audible Illusions Modulus 3 preamp, Golden Tube SE-100 power amp, Pioneer Elite PD-54 stable platter CD player that I'll be using for the transport, and a pair of Acoustat Spectra 11 hybrid electrostatic speakers. I'd have to say that presently, the one biggest problem with my system is that it tends to sound a bit dark. So, how about it? Which DAC would you recommend to put a little more life into my system? Thanks in advance for any recommendations.
mikelballinger
If you want to "lighten" the sound of your system without ruining it, you may want to try some "revealing" cables. If you do not have a good local dealer to work with, try the Cable Co, as you should "try before you buy" and they usually can recommend something that will work with your gear. For Dacs, I have tried a stock MSB Link I at home and also owned a Cal Sigma. I would vote for the Cal Sigma. I did not consider the Cal to be as mellow as some do (neutral would be my opinion of it). However, I did think the MSB was lean sounding.
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Joe B and Jab, where you using the earlier Sigma or the 24 / 96 Sigma II ? I think that there is a BIG difference in sound between those two. Sean
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I was using a Sigma II, but it was not the 24/96 version. I only tried the stock Chinese tube and a Sovtek, and preferred the sound of the Sovtek. I did not consider the Sigma II to be harsh sounding and I would have lived with it longer, but I already owned a Micromega DUO BS2. Here is where my personal taste or bias comes into play. The Micromega admittedly had less inner detail and a smaller soundstage than the Cal. Initially I found the Cal exciting, but when I switched back I found the Micromega reproduced the sound of acoustic instruments more realistically and was more enjoyable to listen to on a long term basis. I did not recommend the Micromega above because Mike said he was looking for a lighter sound.
Just to make it clear for all of you who are kind enough to respond to my question, the CAL Sigma is the original version, not the Sigma II and, as I said, the MSB is the basic, unmodified Link DAC III. Thanks for the information so far. Keep it coming. Mike