Just want to give everyone an update on my trial result of bichi's X7R MLCC cap as coupling cap on X-Fi Elite Pro.
First of all, thanks a million to bichi for providing samples and give me this chance to try. Bichi is a very cool guy to meet anyway.
My original mod was using 100ohm resistors replaces coupling cap C35, C45, C58, C49. I made a few other modifications on my existing X-fi elite since met bichi, including changed the C104, C133, C154 +/- 12V and +5V power cap to 470uF/16V panny FM, changed DSP power filter cap C151 to 1000uF/6.3V FC, changed DAC decoupling cap C40 to Elna Silmic II 100uF and replaced C60, C55, C109, C131 from Oscon 47uF to Kemet tant 47uF. To avoid these changes affecting the MLCC cap trial, I let the card burn-in for three days.
Now comes the MLCC caps to try.
With 100ohm shorted, at idle, the left channel measures +5mV and right channel measures -1mV. With MLCC cap, but channels are 0mV at idle, which is expected.
First, let's look at the RMAA result from technical perspective.
My system:
W2K3 x64 Q6600 @ 3GHz, 4GB memory (sorry no crappy Vista)
X-Fi Driver: the latest Creative beta driver 6.0.1.1281
X-Fi mode: audio creation mode, 24/96, bit-perfect playback enabled
RMAA: 6.0.6
Player: foobar 0.9.4.5 with ASIO plugin
Headphone: HD-595 direct on line-out
The MLCC cap result is excellent, there is very slight loss on the low freq side, but it's barely noticeable. The dynamic range of MLCC cap is excellent.
Next, some real listening test.
I used Burmester Reference CD #2 for testing. The MLCC cap sounds very neutral, the high is open and transparent, and the bass is tight. It's noticeable with MLCC cap, it reveals more details. The sound is colorless, so depends on the personal preference, some people may feel it's too cold. As far as the bass goes, I do not see any noticeable bass loss. HD-595's bass response is not that good anyway.
Overall, I really like the MLCC sound, and decide to keep the setup. It's a little bit cold for some female vocal scenario, but once I change the output to my little dot MK 3 tube headamp, everything is perfect.
All images are
here.