I was wondering if it would be possible (and safe) to run a guitar into a power amp (the type usually used for live sound) which would be powering a pair of monitors. Also, the power amp only has binding posts, no 1/4" outputs, so I would need to use 1/4" to banana plug adapters for the monitors. Anyone know of any cheap ones? All the adapters I've found are anywhere from $9-$18 not including shipping, which seems a bit much.