Chambered and semi hollow guitars always resonate more. All of my PRSs are now semi hollow with trems. Magical combination. That is what you are hearing, especially when unplugged. My Strat and tele rang louder than my PRS solidbodys acoustically too, but they dont ring louder than my PRS semi hollows. Sell that sig, save some money and pick up a CU22 semi hollow LTD. One of the best sounding guitars PRS has ever made IMO, and it will ring like a bell acoustically and especially plugged in. Killer 57/08 pups as well. WHAT a guitar!