I own SSS too and even used it as my , but I never really noticed a difference. Your TG-16 hardware is running on 19-20 year old capacitors at this point, including the ones for sound, so I would think the weakening is due to that. Some of the repair guys around here showed how you could use slightly larger valued sound capacitors during a cap replacement for a TurboExpress to get even louder than normal output, but I personally chose to use the original values (just figuring Hudson/NEC likely chose the best values given the speaker).