#1
i am wondering if I plug a 2x12 below it from the external speaker output if it will then play thorough both the 4x10's and the 2x12's at the same time.

and if this is a yes, would the 2x12 need to be 8ohms? i'm a bit confused. thanks.
#2
yes and yes.
My name is Charlie.

Gear
Gretsch Electromatic Pro Jet
Fender Deville 410
Electro-Harmonix USA Big Muff
Digitech Whammy IV
MXR Micro Amp
Dunlop Crybaby Wah