Hi, Just wanted to get some confirmation on various pearls of wisdom I've heard over the years. There's also an implicit "why?" at the end of each Q, so if you could be so kind as to explain the reasoning behind each answer I'd appreciate it! 1. Is there such a thing as a "Bass Cab", or will any cab (guitar, PA etc) work so long as it is attached to a bass amp? 2. Will you damage a Bass amp plugging a guitar into it? Will you damage a guitar amp plugging a Bass into it? What about a Bass into a keyboard or acoustic amp? Will it cause problems if you run multiple instruments through an (appropriate to both instruments) amp at the same time? 3. Will you damage a head if you run it without being plugged into a cab (eg just plug in headphones)? If yes, does the cab have to be of a minimum rating dependent on the output of the amp? 4. What are the benefits/drawbacks of single cone cab over a multi? 5. What is the point of multiple cabs running off the one head? Just because there are more speakers doesn't mean it will be louder. 6. Are those walls of cabs you see behind a lot of rock bands there primarily for audio, or visual reasons? Do they run multiple heads? If they are set at the same volume, what's the reasoning? 7. What is the effect of larger cones? (no smart @ss answers thanks! Thanks!