Just some thoughts which come to mind:
-- Have you removed the grill-cloths and examined the woofers (and the other drivers, for that matter) to see if the surrounds are torn or disintegrating? That commonly happens with 20-something year old speakers, and might account for what you are describing. And if that is the problem, it is most likely repairable.
-- My instinct would be that an ADC equalizer is likely to do more sonic harm than good. Have you experimented with speaker placement, listening position, speaker toe-in, having absorptive furniture or other objects near the speakers rather than reflective surfaces, etc.? Those are generally the kinds of things which should be addressed before resorting to an equalizer, especially an inexpensive one.
-- How have you had the equalizer set? If it is set to boost bass frequencies substantially, perhaps that is what the speakers are unhappy with.
Regards,
-- Al
-- Have you removed the grill-cloths and examined the woofers (and the other drivers, for that matter) to see if the surrounds are torn or disintegrating? That commonly happens with 20-something year old speakers, and might account for what you are describing. And if that is the problem, it is most likely repairable.
-- My instinct would be that an ADC equalizer is likely to do more sonic harm than good. Have you experimented with speaker placement, listening position, speaker toe-in, having absorptive furniture or other objects near the speakers rather than reflective surfaces, etc.? Those are generally the kinds of things which should be addressed before resorting to an equalizer, especially an inexpensive one.
-- How have you had the equalizer set? If it is set to boost bass frequencies substantially, perhaps that is what the speakers are unhappy with.
Regards,
-- Al