Reminder: Your Combo Club Wiki page has several links "Defining Combo-ness" in the Combo Club Cyclopædia section. Of course most of them deal ostensibly with the Ampeg B-15, but the basic concepts are there.
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OK, but that's discovery and discussion. I'm looking for a simple definition to clarify the majority of cases.
How about this?
A bass combo is a combination of an amp and speaker unit attached in such a way that they are designed to be stored, moved, and played as a single entity. The sole exceptions to date are Ampeg Portaflex units.
Note: IMO, this would allow a head that's bolted permanently to a cab to be considered a combo. It would not allow one attached with hook and loop fastener unless said fastener was strong enough that the whole thing could be picked up by the usual straps or handles without coming apart. There would still be exceptions to argue over, just less of them.
Speak now or forever hold your combo a few inches off the floor with your fretting hand, which gets old fast.
