I'm using a single BAT VK-75SE with WP 6's. Sounds pretty great to me, and I've heard plenty of good systems. I like tube amps with the WP's.
So yes, lower powered amps can do the job, besides the big solid state amps. Not sure If I would go much lower in power than what I have, also this bat amp has tons of current. I had a BAT VK60 before the 75se, it sounded great until the 75SE showed up. Much tighter bass, bigger stage, better depth and detail.
Part of this depends on the rest of your setup. The WP's really show what's upstream and where they are placed in your room.
So yes, lower powered amps can do the job, besides the big solid state amps. Not sure If I would go much lower in power than what I have, also this bat amp has tons of current. I had a BAT VK60 before the 75se, it sounded great until the 75SE showed up. Much tighter bass, bigger stage, better depth and detail.
Part of this depends on the rest of your setup. The WP's really show what's upstream and where they are placed in your room.