I have obtained a Mesa Boogie Walkabout amplifier head... it uses 1/4" outputs for the speaker and I don't have an external cabinet to hook it up to. That said, I do have a Genz Benz Shuttle 6.2-12T combo amplifier which has an awesome speaker. It has a single speakon output however. How do I make sure what kind of adapter I need, or cable.. to be able to use this cabinet with my Mesa Boogie head. Thanks.