I don't know the model, but it was 130 W/channel, 240 into 4 ohm, so 480 bridged that I heard. Henk normally uses it for his bass panels on the grands but played it on duettas for demo
Thanks, I now traced the old connection between the SA250 mkIV and the Duetta Signatures. Terrible, also I know there is a pair of strongly Dark Grey Signatures laying around in a garage in my neighborhood and I still have a tube with ribbon tweeters spares in my closet ... But each is twice as heavy as my Plinius!