I have a JVC R-X400 AMP/Receiver.
2x JVC SP-SX20's
1x JVC SP-XC20
The Amp has 70 watt per channel, 2 channels and left/right separation (duh)
The SX20's each take 30 watts "Power Handling Capacity"
and The XC20 takes 50 watts "Power Handling Capacity"
Both are 8 ohms, and the amp says to you...