Can someone please define 'growl' ?
I've heard the term used, sometimes with a Martin referenced, but haven't a clue what it might sound like.
Perhaps a heavy bass rumbling?
My Aussie growls at night when he hears sounds that he deems inppropriate -
He's usually quite unpleasant and perturbed when he goes to see what caused the noise.
Be a shame if it was some poor guy playing a bass heavy Martin guitar - - -