If you can’t fix your current amp I’d listen to @mazian above who had your speakers and had good results with a 100Wpc McCormack amp. Here’s a nice DNA225 that’s 225Wpc and 400 into 4 Ohms. I’ve got a completely modified DNA 0.5 amp and its got guts and soul, which is probably why mazian liked it with your speakers.
https://www.usaudiomart.com/details/649982529-mccormack-dna-225-power-amplifier-works-perfectly/
But I’d try to fix your amp first if you like its sound. You could also contact @bigkidz here as he seems to be able to fix anything and may even improve your sound a bit. Best of luck in whatever you choose to do.