Hello experts! Im currently on the hunt for a headphone amplifier with 4 separate headphone outputs. Anything similar to this (price range $100-150): Behringer HA4700 Powerplay XL Headphone Amplifier at zZounds The only spec I need is the built-in posibility to mix 2 signals so I can easily offer a "More Me" monitoring mix for every musician. Every channel of the HA4700 has an aux input, and an aux/main knob to control the mixed amount of main and aux signal present on every output. This is what i absolutely need. Im not on the US so its kind of hard to buy gear and the ha4700 is not available. I need all the options I can get, so go crazy! BTW, I already have a passive monitoring box (a RedCo LittleRedCueBox) but its doesnt provide enough volume for the musicians. Thank you! BTW, I'm in Latin America. I wish there was local Thomann outreach, they're great!