@fsmithjack
The tweeter used in the older version of the S5 is inadequate. It compresses terribly above 90 dB SPL (a major design mistake on this speaker probably corrected on subsequent models). Perhaps you listen loud and are sensitive to this harsh dull distorted sound? Being a metal dome it will also have plenty of high end and risk of resonances. Finally, tweeters that compress easily at modest volumes like 90 dB SPL will likely burn up their tweeter Ferrofluid quickly. If these speakers are a few years old then I would consider to replace the tweeters.
Based on your outstanding list of previous ownership I think your speakers are not working properly - have the tweeters checked first and see if there is an upgrade available.
Here is a link - check the two "deviation from linearity" plots the performance of the tweeter is horrendous for a speaker at this price/quality. (2 dB compression at 90 dB and 3dB at 95)
http://www.soundstagenetwork.com/index.php?option=com_content&view=article&id=1043:nrc-measu...
As the voice coil in the tweeter heats up the resistance increases and then the crossover will no longer work properly as it is not matched for the higher tweeter impedance. Since the crossover is around 2KHz any trouble there will be easily audible and that frequency can sound harsh if elevated.
Trust your ears!
The tweeter used in the older version of the S5 is inadequate. It compresses terribly above 90 dB SPL (a major design mistake on this speaker probably corrected on subsequent models). Perhaps you listen loud and are sensitive to this harsh dull distorted sound? Being a metal dome it will also have plenty of high end and risk of resonances. Finally, tweeters that compress easily at modest volumes like 90 dB SPL will likely burn up their tweeter Ferrofluid quickly. If these speakers are a few years old then I would consider to replace the tweeters.
Based on your outstanding list of previous ownership I think your speakers are not working properly - have the tweeters checked first and see if there is an upgrade available.
Here is a link - check the two "deviation from linearity" plots the performance of the tweeter is horrendous for a speaker at this price/quality. (2 dB compression at 90 dB and 3dB at 95)
http://www.soundstagenetwork.com/index.php?option=com_content&view=article&id=1043:nrc-measu...
As the voice coil in the tweeter heats up the resistance increases and then the crossover will no longer work properly as it is not matched for the higher tweeter impedance. Since the crossover is around 2KHz any trouble there will be easily audible and that frequency can sound harsh if elevated.
Trust your ears!