Minimum recommended amplification requirements and amplifier matching

Thank you
@atmasphere

I asked this question in another discussion but this one suits better.

If a speaker manufacturer has the following specs; do they mean the recommended power in 8 ohms or 6 ohms?

Specs:
Impedance: 6 ohms
Recommended power: Minimum 50wpc

If a speaker manufacturer has the following specs; do they mean the recommended power in 8 ohms or 6 ohms?

Neither. I'd imagine the particular speaker manufacturer is providing a spec for minimum amplification because they are wanting to avoid clipping, which occurs more easily when lower powered amps are driven hard (played loud).  

Thanks @gdhal 

So, if I buy an amp for my 6 ohms speakers with recommended minimum power of 50wpc and if the amp has a power of 50wpc in 4 ohms and 25 wpc in 8 ohms. Am I meeting the "technical" recommendation?

I know what matters is whatever sounds good to us regardless of the specs (as long as you do not know want concert levels in your room) but I am just trying to learn the technical aspect of it.

@cleo  Have you asked the speaker designer/ manufacturer/ importer/ dealer?  I'm sure they will answer your questions with more specificity and accuracy.