My friend is getting a bass and an amp to play in a rock band. I showed him the essex basses and he'll likely be buying an essex J bass, but he still needs an amp. He said it will be him, a guitarist, a drummer, and a singer and it will be fairly loud rock. Looking around the web we came across the behringer BX3000T 300 watt head and an avatar CB112 500 watt cabinet. Would this be a pretty loud setup considering it would only be driving 1 12 inch speaker? Is there a more efficient and cheap setup?