On the headphone socit on the toneport ux2, can i plug an external headphone amp into it so i can have like 8 head phones at once?

Plug external Effect units into the toneport so i can add reverb and eq etc to individual tracks on Cubase during the mixing process or send signals from Cubase through toneport and into the mixer so i can add fx and sh*t to individual chanals?

Thanks allot for all of the help :D