My winged-C's finally died after years and I put some JJ's in. The change in sound was drastic. It seems the JJ's are very clear but the low end that you would feel in your chest is completely gone. The sound guy was asking if there was something wrong because of the lack in low end I usually have and he had to push me up in the mains. Anyone else switch from Winged-C 6550 to JJ 6550 and notice a difference?