SE amp with low impedance speakers?

I currently have Dunlavy SC-IV/a's. They have a 92db efficiency/4-6 ohm impedance window......anyone paired an SE amp with a speaker of this sensitivity? or has anyone paired any other tube amps with success to a speaker of this type? I will be demoing an Art Audio Jota in the coming weeks (with specially wound transformers)so the speaker match should be good. Any Jota owners out there?
Single ended owners? Any info would be great. I'm done with ss.