Pass x250.8 vs Boulder 850 vs Spectral DMA250


Hi all, I sold my old integrated amplifier (Vitus RI-100) and now I have a C2550 mcIntosh Preamplifier.
Next month I will have the possibility to make an audition on these amps, some of them are second hand so the resulting price will be more or less comparable:
- the new Pass X250.8 (I am afraid about what I read on burn-in hours required)
- Spectral DMA 250
- Boulder 850 monos
my intention is to drive my Sonus Faber Elipsa Red with a very good slam/control (where Vitus RI-100 lacked) but without loosing the excellent Vitus mids/highs.
Anyone experienced ? Any other suggestion will be appreciated.
Thanks
Massimo
maz65
The thing is, when you audition a lot of stuff, you remember all the good things. As a perfectionist at the end you want it all.

All parts you judge an amp for, need to be exeptional. When you have done a lot of lestiening, you are able to listen to all different parts in a very short time. Most people who have this as a hobby, can often listen to a few of these parts at one time.

Beside this, audio always will be a personal matter.
@Bo1972, you hit the point, and I'm lucky: I will have enough time to test those amplifiers, not only a day, but sure I want to:
- get emotion, the only parameter I personally consider when all other parameters are substantially correct
- be absolutely calm ! :-) very high risk of compulsive buy!

Seriously, an hi-end journalist said that a correct equipment evaluation is made on the first 3 minutes and the next 3 months.
I was asking for suggestion because coupling tube preamp and solid state amp could be very critical but I feel to follow this way, because I hear the potential of this solution.

@Ebm, thanks, an audio reason to do so without any doubt.. will be welcome.. :-)
I loved my x250.5, but my xa60.8s were in another league.

Check out the pass xa.8s
@Skootb if you take a look at my system pictures, there is no space to place on it two monos like the XA... I will double check again.