At least the specs on the PAAS system for the 3X are not bad, and should give you the monitoring levels you need/want.

•Dedicated Amplification System for 76 and 61 key models.
•3 Channel Amplifier: 2x20 Watt (Mid/Hi) + 1x40 Watt (Subwoofer).
•5 Speakers: 2 Midrange (80mm), 2 Tweeters, Dual Coil Woofer (130mm).
•Cabinet: Aluminium case with Bass Reflex System
•Connectivity: through custom connector. No audio cables and no power supply needed.
•Dimensions: 992 x 173 x 137 mm / 39.06 x 6.81x 5.39 inch
•Weight: 5.7 kg / 12.57 lbs


Allan