Usually speakers are the most obvious for me. When I went shopping for my first pair as a student in the early 80s, I fancied those blingy Missions with the white baffles and the big Mission print on the front ( obviously intended to be used without grilles- impress your mates stylee). As soon as I listened I thought 'nope'. As soon as I heard Castle Tynes it was an instant yes. So I ended up leaving with the pipe and slippers option.