[Jon L]

OPA627

The gold standard in monolithic audio opamps and rich man's NE5532. This one fills in most of NE5532 sins of omission in resolution while building out a little more density of tone, vocal liveliness and sparkle. Still not the last word in detail resolution, top-end air, or bass crunch but good enough in most of these areas as not to detract from enjoying one's favorite tunes. Most of all, the sound signature is instantly familiar and comfortable from years of exposure to the sound signature in various gear and DIY efforts. Two OPA627AU's adapted to DIP board can be found at reasonable prices and still a viable choice.

[viggen]

i've received duelund DC cable from ghent last week. 

in comparison, the stock dc cable sounds mushy. 

after swapping cables, the OPA134PA and GE combo didn't sound as good.  sounded hard and etched. 
so, i went back to muses02 and changed to rca 6189.

maybe try the bb op amp again after dc cable has more hours.

[Jon L]

i've received duelund DC cable from ghent last week. 

I have a couple of Ghent Neotech UPOCC Copper Teflon Solid-Core 16awg DC cable (JSSG360).  Incredible parts and build quality and clearly more detailed and capable than most generic copper/pvc DC cables.  I also have made DIY versions using Duelund and WE wire.  There is something to be said about generic cables (IC, power, speaker, DC, digital, used in recording/mixing) yielding more forgiving and familiar tonality when used for playback IME.  Or, a bunch of re-tweaking and swapping may be necessary to rebalance the sound..