I have a pair of HLS-610's from JBL. I bought them about 7 years ago. I've played them 3 to 4 hours a day every day of the 7 years. Lately though,the tweeters sound dull and the woofer sounds like my hand is in front of it. Ive checked them and cables and connections. Do speakers just get fatiqued? When I turn them up loud the sound seems to get muddy I cant make out the words. My 1050 seems ok. too. Thanks,