I after several promises that he would honor the purchase, several will be done by dates, followed by an attempted bait and switch, Lukasz, without telling me personally, has through PayPal, refunded my money. Over a thousand dollars in tubes purchased which are now of no use to me, and an apparent loss due to the exchange rate, and all I have to show for it is evidence that Lukasz isn't to be trusted. Hardly the outcome I was looking for. So, I am really not interested in dealing with Lampizator, fool me once, shame on you, fool me twice shame on me. Therefore I am in search of a DAC, hopefully in the 4K range that someone has had first hand knowledge of that can go head to head against the better Lampizators.