when you plug the internal speaker and a 1x12 ext cab into the (1x8 ohm or 2x16 ohm) jacks is it equally pushing 20 watts to each speaker or is it still 40 watts to each? the reason im asking is im debating on trying a 30 watt speaker in the 1x12 ext cab but not if its getting 40 watts supplied.
it splits it into 2 seprate loads. So you'll be just fine.
2002 PRS CE22
2013 G&L ASAT Deluxe
2009 Epiphone G-400 (SH-4)
Marshall JCM2000 DSL100
Krank 1980 Jr 20watt
Krank Rev 4x12 (eminence V12)
GFS Greenie/Digitech Bad Monkey
Morley Bad Horsie 2
MXR Smart Gate