Huge Natural Sound!
I attended a concert by a duo consisting of a cellist who sang and an acoustic guitar player who sang. The venue was a large church. The sound was so big and natural I could barely believe it. The instruments sounded totally natural, and the low frequencies (cello puts out some bass!) were so full and natural and LOUD and perfectly integrated with the higher frequencies that I kept wondering where the other speakers were. And somehow they avoided feedback. Awesome sound. Almost unbelievable.