Amp requirements to push 2 Ohm speakers?

What is ithe formula to figure whether an amplifier will safely push 2 Ohms speakers? Thanks
what are the speakers?
Actually, I am not sure. I am offering my Classe Ten amp for sale and a buyer wants to know if they will push his speakers at 2 ohms. I will try to find out. Thanks
I had Innersounds wich dipped down to 2 ohms in the upper treble output, I used a Parasound and a old Proton amp with no hassles.
have the buyer contact Classe or look in your amp manual or google a review of your amp where the specs will be listed
You can use a variety of tubes amps if they are supplemented with a pair of ZEROs.