Do all toroidal transformers hum?

How did you get from "can't hear any hum more than four inches away"... to.... "All toroids are inferior?".

If you aren't wearing the amps as headphones the hum issue should pose no significant issues.

Certainly, if you have toroids in your amps and don't like your amps... perhaps only those toroids in your own amps are inferior.

Relax. Don't sweat the petty stuff, but do remember to pet the sweaty stuff now and then.

Stan outlined it pretty well already.