My JH13Pro arrived couple of days ago and I've been listening to them non stop. Superb sounding and all the raves are true. Wish I had jumped on the bandwagon long ago. I think the bass on the 13pro is top notch and any more will likely be too much for me. Coming from a Shure SE530, the JH13pro is a huge leap in sound improvement. Best part about the 13pro and the custom design is no more listening fatigue!! Question is what an upgraded cable will do to the sound of 13pro? Anyone?