OK, guys,
although I love ampeg, I have just about decided to get my son a Fender 300 pro amp as the best compromise of quality and features and price (which, unfortunately, is very much an object--

)
i have two qx which I would appreciate anyone chiming in on.
1) look at the pic below:
it is a cropped portion of a pic of the backside of the Fender 300 pro.
notice the 2 speaker outputs and the impedance selector switch.
i know this is a newb qx, but i just want to be sure. if i hook up two 4 ohm cabs, one to the main speaker output and one to the external speaker output, will i have to move my impedance selector switch to 2 ohms?- I guess i am just ignorant of impedance as it relates to multiple cabs plugged into 2 outputs on the amp.
2) any final thoughts or anything i should know? i already did a thread about this amp and got some really good response, which helped me make up my mind.
any last minute reservations or things i should watch out for?
thanks,
