[pepps]

Hello,

In my experience the panel speakers from this era did sounds great when wall mounted because the drivers could be mounted at the right height for the best stereo image.
I had a set of P45s which lost some of their clarity when stood on the floor.

Regarding the ‘quiet’ sound I would be concerned about seized drivers. My first pair of P45s had this very problem – the woofers wouldn’t move at all. It was like they had set rock hard.
I acquired a second set which had perfectly agile woofers and which sounded nice and clear and as expected.

Could be a similar thing with these.

See if the seller can take the front baffles off and show you the woofers flexing by hand.

Julian