QUOTE(guitar89 @ May 26 2012, 08:04 AM)
Hi, rifasha.
I just bought HD668B and also own a PCM2704 based DAC, but my DAC left at other places which only after this weekend I can try it.
I also get a custom cable, but from another person though. (ssyycc) Haven't really tried them though.
Did you burn-in for moment before your first impression ? My first 'out-of-box' impresion wasn't good, but after like 5 hours of playing, its alot better. Alot claims that it become better with more playing, so i'm looking forward to it.
Did you get any better DAC ? I'm also thinking of getting better one, but have no idea which is good and cost-wise not expensive. (good performance-to-cost ratio, just like superlux headphone ! )
Have you replace the short cable or do some modding ?
Hello guitar89,
Im happy u bought the HD668B as well since its very good! i have been using it for some time now and its getting better the more u use it. My out of the box impression exceed my expectation since i use this headphone with the custom cable and DAC. (much2 better than my previous Philips headphone)

Right now im trying my friend's HD669. A forumer also and bought from Trio as well. He asked me to try it. Well, using the stock cable it got some noise but after i put the custom cable, it produce superb clarity and the noise were gone. But still need some burning tho, should give some time for its potential to explode~now he is looking for portable amp as well.
I haven't replace the short cable yet but i might replace it in the future. Will definitely post it here once i did~

ENJOY ur HD668B~!