I have been an aficionado of JBL speakers for a little while and my last buy was the JBL GTO 938 and I cherished those speakers. I seen these were the following redesign of the GTO arrangement so I purchased the 939's and in addition the GTO 638's however when I introduced the 939's, the correct speaker didn't sound as the left one. The speaker isn't busted and it has great bass yet it breaks out as I crank the volume up. It's peculiar b/c it will break a little yet then stop and really stable great however then on a few tunes, it's sounds like the speaker is going out and the sound winds up muted. I realize the speakers were introduced accurately however I am relatively positive these have came officially harmed. I need to return and get another combine of indistinguishable ones from I realize I will be content with the item yet I am simply baffled about getting these and requiring another match so fast. Visit this great site http://www.stereostefan.com/