OK, so you had some badly designed big speakers! BTW, it's the output
impedance that determines the 'grip' on the speakers (below resonance,
at any rate), not the power output.
--

big snip


Me - design bad speakers!..............LOL

it's the output impedance that determines the 'grip' on the speakers .....

Mmmm But then .. which amps have the lowest output impedance?

David