Welps, my Hotrod does not have a headphone jack (

), so I was wondering if, since tube amps don't like to not be hooked up to speakers, I could disconnect the speaker and insert a set of headphones? I'm guessing the headphone impedance would have to be 8 ohm, since that's what my amp uses. And if this is doable, would having a volume control on the headphones themselves make them act as an attenuator?