If a 2x12 cab can operate at either 4 ohms or 16 ohms (via a separate input jack for each), this means the two speakers in the cab must be 8 ohm speakers, correct? If so, what happens if you replace those 8 ohm speakers with 16 ohm speakers? What is the resulting ohms of the two (formerly 4 & 16 ohm) jacks? 8 and 32 ohms? Also, according to http://www.colomar.com/Shavano/2x12wiring.html, only 8 ohm speakers are desired for this sort of a setup, that "no other impedance speaker is recommended for this configuration," but the site doesn't explain why. Anyone know? Thanks!