Pass labs xa25 amp and BW 804 d3?

Going to need more power , Try the DK intergrated amp

Sorry man, but that DK doesn't come close the the quality of any Pass amp. If you're talking about the one Stereophile reviewed, that's a product of numerous dubious design choices. The XA25 is a vastly superior product. 

Dear Readers;
I run my Vandersteen Model 5s with a Pass Labs X250.  The x250 has never left class A operation as indicated by the front panel meter.  The sound level if desired, can be quite high.  Maybe not rock concert level, but very adequate for home use.  Hope this helps.

How many class A watts does  the Pass Labs x250 provide? 
Charles 

The X250 isn’t even a class A amp. It’s a high bias class AB amp with a single ended bias of 20 watts. 
Contrast that with the XA25 with it’s 50 watt class A envelope. That’s a plenty of amp for most people.

https://www.passdiy.com/project/articles/leaving-class-a