I recorded a classical recital (piano and vocal) - it was a live performance and thus i used 2 Rode NT3s in X-Y config about 15 feet away from the stage. The room was somewhat boomy, but the recordings sounded very thin and distant? what should i have done differently (i have recently added 2 Behringer ECM8000s to my mic collection - would these help and where should i place them) thanx!