Re: vox amplug headphone amps
I own two Vox amplug: Metal and Lead models. They're not the new version into a headphone, but the "tiny box" with external earbuds/speakers.
I play hard rock and heavy metal. The lead model takes it from acdc to guns n roses, but the metal model isnt so versatile. It delivers thick distorted sounds, think of metallica to slipknot.
Never forget it is a practice tool... But IMO the lead model is amazing. It delivers great sound and sustain. I can get close to a Slash's sound with my les Paul... for 35€!
The metal model isnt so good, but I like it too. It has a really full sound, at least with SG/Les Paul. Try to set all controls at 6-6-6. Its not a joke, its the sweet spot!
This said, I must say they sound WAY BETTER when plugged to an external speaker, even if its small & cheap. I only use headphones at night.