I am confused. Knowing very little about sound systems I had posted a question concerning sound for a classical guitarist and wind synthesizer performing in short wide banquet halls... How can a keyboard amp be adaptable -no a top player in the field of pa systems? Would I be able to plug the guitar and synth directly without a mixer? Would I be able to run directly from my guitar amp head to these speakers so I can use the guitar amp effects loop? Would I be able to connect directly and use an adequate effects loop on the baretta sona 32c? What do they mean by pro combo version? This must be a powered speaker? Do vocals get hooked in directly? well enough questions ..music123 has bstock for $570 so I had better figure out exactly what bstock is! thanks for letting me ramble.