Douglas John Strohbeen has stated in interviews the issues with driving Fs well without damage and maintaining them properly is supposedly the reason why the design was dropped. Not practically supportable.
I think with any amp you just want to be very careful.
It’s the CLS design driver that replaced the original Walsh driver that resolved that issue. Every CLS Ohm I have owned will take whatever you throw at them and deliver effortlessly. I have never heard or owned original Fs. Mine are newer CLS design on refurbed F cabinets. Totally different. So I can only repeat what I have read there. Ferrofluid was introduced into the F design as I understand it to help address that issue as well. Clipping is never good either hence the challenge. I would try a higher power amp like a Class D for more bang for the buck if needed . But be careful.
I think with any amp you just want to be very careful.
It’s the CLS design driver that replaced the original Walsh driver that resolved that issue. Every CLS Ohm I have owned will take whatever you throw at them and deliver effortlessly. I have never heard or owned original Fs. Mine are newer CLS design on refurbed F cabinets. Totally different. So I can only repeat what I have read there. Ferrofluid was introduced into the F design as I understand it to help address that issue as well. Clipping is never good either hence the challenge. I would try a higher power amp like a Class D for more bang for the buck if needed . But be careful.