Hi driguy, thanks for those points for consideration!
Bill was saying earlier that you are using 2 pairs of duelands in the dac and pre-amp http://www.head-fi.org/forums/f7/cha...ml#post6489984
I was wondering why you chose to double the caps up, and not just use caps in one or the other. The reason I am asking I because I am considering trying the duelands myself after all the good vibes from your good self and others about them, but it gets pricey and I am wondering if I can get away with having no caps in say the amp, and rely on the just the one pair between the dac and amp?
I would recommend putting them in the smallest value spot first (in the signal path of course) to get a taste with the smallest up front cost. They do jump in cost pretty fast as the values go up. Parts Connection has fairly frequent sales so I would wait for one if the values are large. Also consider that they are low voltage unless you order a high voltage version (more $$) so the larger value at a lower voltage may be the best choice. Almost anything in a tube amp will require high voltage. As far as I know they have the value Bill Allen used (fits inside the DAC) available and potentially on sale as I believe they are return items. Worth a call if you are interested.