The subwoofer has a 3 channel amp built in so you can connect it to a board and satellite speakers without another amp.
The amp for the sats is 85 watts rms but I couldn't find any information about the impedance of the satellites so you would want to know that to get compatible satellite speakers. http/geminisound.com/wp-content/uploads/2013/01/XTR-500-USER-MANUAL-10-12-05.pdf
The subwoofer has a 3 channel amp built in so you can connect it to a board and satellite speakers without another amp.
The amp for the sats is 85 watts rms but I couldn't find any information about the impedance of the satellites so you would want to know that to get compatible satellite speakers. http/geminisound.com/wp-content/uploads/2013/01/XTR-500-USER-MANUAL-10-12-05.pdf