I'm finally getting back to headphone use after years of things being boxed up. When I last used my cans I had a receiver with a headphone jack. That was about 1000 years ago. Now I have no way to drive either my Yamaha YH-1 or Sennheiser HD540 Reference II, and I may someday want to try something like a Beyer DT880/600.
So I know I'm asking an unrealistic question given I'm looking for an amp that could perform well across a range of cans like these, but I'll ask anyway . I don't need a combination amp/DAC. The amp will be driven from my Pass XP-20 preamp Tape Out, which will get me music from my 2 channel system that I think would take a pretty high end amp/DAC of its own to match. SS, tube, or hybrid designs all will be considered. I have no bias against any, but what I'm looking for is something open and smooth without smothering articulation, good extension and control on both ends. No tizziness but not rolled off. Will consider a good kit design (I can build stuff like this if the kit is well designed). This will not be for portable use.
Price? That's the part that will probably get me laughed off the boards. Remember I'm asking for decent "for the money", which would be no more than $300, new or used.
Yeah, I know; I'm a lightweight. Just tell me right off the bat if this is impossible instead of making it obvious how crazy this might sound.