I'm thinking of upgrade the stereo system. I found component speakers that I like; JBL MS-62C. I want to find an 4 channel amplifier for it but the specification got me really confused. JBL website - nominal impedance: 4 ohms and RMS: 80 watts Sonicelectronix - impedance (per voice coil): 4 ohms and RMS: 160 watts per pair/80 watts each. Do they mean...... 1) 1 woofer and 1 tweeter after connected together has 4 ohms and rms: 80 watts or ...... 2) 1 woofer and 1 tweeter each has 4 ohms and rms: 80 watts; after wired together has 2 or 8 ohms (not sure) and 160 watts or ...... 3) 1 woofer and 1 tweeter when they connected, the pair has 4 ohms and rms: 160 watts I can't decide which one is the right information.