Hi, newly purchased Crack+Speedball owner here (unit is 9 months old, proffesionally assembled). Thanks for all the help in this thread for helping me decide to get it.
I have a question though that is niggling me on it. So I have a Titanium HD soundcard in my computer which I was using prior to this purchase and enjoying. It has a Burr-Brown PCM1794 inside it.
Now, I've routed it's DAC to the Crack with LC-1 3 ft cables and listening to it after warmup and using a few different 12AU7 tubes (6080 power) and I think I enjoy the output of the soundcard's headphone out on most songs, except high lyrics songs which I'll give to the Crack just about.
This seems wrong to me given all the suggestions that this would pair excellently with my HD6XX phones, which are about a week old with about 30 hrs in.
The "tube sound" seems to me a little bit muddled, rounded is all I can explain it as. The detail is there but I can hear that detail more clearly/cleanly and brighter out of the headphone jack of a 7 year old, now $70 soundcard that according to people in reviews shouldn't even be able to drive a 300ohm set of cans well.
I don't know if it's sign but the Crack also needs turning up to around 75% to what I consider "loud", with 100% output from the sc lineout. The Crack's 100% is louder than the sc 100% though.
There is no hum or other such noise from my Crack at 100% with silence coming from the sc lineout.
The Crack sounds good, and I wasn't expecting MASSIVE improvement but I thought it would at least beat the soundcard jack for the price and people's opinion it pairs so well with the HD650/6XX.
So what's the deal in your opinion? I know it's a tough question but am I just not used to or a fan of "tube sound" or is there something else going on?
I am contemplating a separate DAC but I dunno, I'm skeptical.