No not custom, just new version I believe ....
XLR out with separate vol/gain / ground lift
TRS/TS out with separate vol/gain / ground lift
Phase reverse switch in case of phasing issue with two power amp
and parallel thru OUT
and newer Thumpinator
and input impedance selector switch
and can work off a 9v battery @200mA (nice as a backup) also 9v parallel out