I bought a Peavey 112 Extention cab for my Classic 30 combo. The description says it has a Blue Marvel speaker, but to my ears it sounds totaly different than the Blue Marvel in the combo. Less heighs. Also it's not as loud as the combo speaker when both are connected to the combo. No i've read on some guitar forums, that it's not a Blue Marvel but a Valveking Speaker. What's the truth? So i mailed to the Peavey Service, this is the answer: Hello, The 112 Extension speaker wasn't actually intended to be used as a match with a Classic amplifier. There are other Classic extension cabinets ( old & new ) . The original 112 Extension speaker was called a Vypyr 112 Extension speaker with " Blue marvel " speaker in it. But this wasn't the same Blue Marvel that was in the Classic 30. They did change the name of this to a Peavey 112 Extension Cab and after a while the speaker in it was changed to a Valveking speaker. Thanks, Peavey Customer Service So they sell a cab which says "Blue Marvel" but it's a "Valveking". I'm not amused.