front rear and sub channel line output converts with active crossovers, gain setting, channel summing, sub sonic filters, q levels 8v preout voltage on preout for subs. and i think 4v on the front and rear preouts.
really nice unit.
brand new in the box. i havnt used it at all. its still in the packaging. i dont have a car. and a guy gave it to me in exchange for some work.