I have an Allen Old Flame Head with a 2X12 cabinet and an Accomplice 1x12 combo. I am selling the Old Flame with the 2x12 and have ordered a 1x12 extension cabinet for the accomplice. I'm just using the extension cabinet for bigger gigs. Just to get a sense of how a 2X12 cabinet would sound with the Accomplice I plugged in the 2X12 cabinet, selected the appropriate impedance and gave it a whirl. It was amazing how much bigger the Accomplice sounded. Both the Accomplice and Old Flame are set up with 6L6's. I was surprised how much the Accomplice sounded like the Old Flame through the 2x12 cabinet. My question is, is it a good baseline as to how the Accomplice will sound with the 1X12 extension cabinet or will it sound much different than a 2X12? The extension cabinet will have a completely different speaker so thats going to make a difference but just the big sound of the 2X12 if the 1X12 with the combo speaker could get 75% of that I'd be happy. I'm considering loading the 1x12 cabinet with a Celestion Gold. The combo currently has a G12V-70 and the 2x12 cabinet has a greenback and a G12H30. So tone wise will be much different.