My KSC-C1 98210963 has died "Was a good one" It's sound quality had been declining for awhile. Since I am much older, my hearing has also. It's difficult " understanding" voices while watching movies . I had been telling myself I would like to find a more crisp, sharp sounding center. Went to best buy last week and bought the only center in stock a Polk T-30. Needless to say not happy with it . I am using a Yamaha RX-V379 AV receiver that we purchased with H D upgrades a couple years ago. Help me please