eddiekusa Posted July 19, 2008 Report Share Posted July 19, 2008 Hello to all. I'm perhaps the newest member to the forum. I just acquired a pair of Legacy II Advents. In remarkable shape. Woofer foam surrounds appear to be in excellent condition. Planning to utilize them as front speakers with a pair of Bose 301 II speakers as the rears. Hooked my Legacys up. Couldn't wait to hear that superb sound I see remarked about in so many reviews. True enough, they are sweet, clean, and rich sounding. The initial trial "listening" was done at low volume settings since I've been led to believe that the earmarks of quality speakers is what i heard at low volume. So far, all is well. But then, I thought I'd "turn it up" a bit. I begin to detect a background "ssshhhh" from only one of the speakers. Thinking it might be a phasing thing, I tried reversing the connections to the speaker. No change. I am in no way a speaker specialist- just an old duffer looking to listen to his music. At the moment I'm using a Kenwood VR-407 receiver but when I've got the energy will replace that with a JVC RX-807VTN. The former putting out 100w per channel, the latter 120. The Kenwood is powerful but seems to be more geared to video home theater sound. The JVC, being about 7-8 years older (1993 vs 2001) is still more geared to audio.But first things first. I need your help in understanding what may be causing my "ssshhhhh"; and what am I looking at with respects losing it.Appreciate youur help. Happy to be aboard. Link to comment Share on other sites More sharing options...
Guest BingY Posted July 20, 2008 Report Share Posted July 20, 2008 If you have not done anything yet, I suggest you:1. Remove the cover and check the foam surround again carefully. You may want to also play the music and see whether the foam is as good as you thought. I recently acquired a pair. The foam surround looked good but broke into pieces when I touched them.2. If the foam surround looks good and is still elastic, you need to turn off the music and push the cone into the speaker gently a few times. Do not push the center round dust cap. Put all your fingers on the cone around the dust cap. If you feel something is dragging, you may have a rubbing coil. In other words, the voice coil may be deformed, misaligned, or broke loose. 3. If none of the above, look for possible air leaks around the speaker. Run a test tone at low frequency (15 Hz) or push the cone in and out and look for air leak. The above tests should do it. If not, please report back results. I am sure there are others that can also help you. Link to comment Share on other sites More sharing options...
eddiekusa Posted July 20, 2008 Author Report Share Posted July 20, 2008 If you have not done anything yet, I suggest you:1. Remove the cover and check the foam surround again carefully. You may want to also play the music and see whether the foam is as good as you thought. I recently acquired a pair. The foam surround looked good but broke into pieces when I touched them.2. If the foam surround looks good and is still elastic, you need to turn off the music and push the cone into the speaker gently a few times. Do not push the center round dust cap. Put all your fingers on the cone around the dust cap. If you feel something is dragging, you may have a rubbing coil. In other words, the voice coil may be deformed, misaligned, or broke loose. 3. If none of the above, look for possible air leaks around the speaker. Run a test tone at low frequency (15 Hz) or push the cone in and out and look for air leak. The above tests should do it. If not, please report back results. I am sure there are others that can also help you. Link to comment Share on other sites More sharing options...
eddiekusa Posted July 20, 2008 Author Report Share Posted July 20, 2008 Thanks for the response Bing. The most recent development is having discovered that the speakers perform flawlessly except (!) on the CD I was playing at the time. A Gerry Mulligan "Nightlights" that I've enjoyed for a long, long time and (!) never heard this background noise before. I'd like to think it is sybolic of the higher quality and sensitivity of the speakers. But, what do I know. As for the foams, they both appear sound and they are still pliable to the touch. I don't know much about these sorts of tweeters though. No idea how one would discover whether they're working as intended or not. Link to comment Share on other sites More sharing options...
Guest BingY Posted July 20, 2008 Report Share Posted July 20, 2008 Eddiekusa,If you are 100% sure that the noise is from tweeter, you may want to replace the electrolytic capacitors in the crossover. They may likely not work well after 15+ years. They are 32 uF and 8 uF. You can search the forum to find suggestions for replacement. They range from non-polar electrolytic or metallized PP film. You can get them from Parts Express or other places. Unscrew the 4 screws that fasten the terminal plate and you will find them buried in hot melt glue.I have made a few DIY speakers in the past. I am currently working on a pair of KLH 17. Speaker sound can be affected by many variables. Search the Internet to learn what you can do. Good luck. Link to comment Share on other sites More sharing options...
Analogman Posted July 22, 2008 Report Share Posted July 22, 2008 Thanks for the response Bing. The most recent development is having discovered that the speakers perform flawlessly except (!) on the CD I was playing at the time. A Gerry Mulligan "Nightlights" that I've enjoyed for a long, long time and (!) never heard this background noise before. I'd like to think it is sybolic of the higher quality and sensitivity of the speakers. But, what do I know. As for the foams, they both appear sound and they are still pliable to the touch. I don't know much about these sorts of tweeters though. No idea how one would discover whether they're working as intended or not.Only one disc so far has this problem, huh?You're hearing brush work for the first time.Put on "Kind of Blue" and you can really start looking for speaker problems.................that aren't there.Regards,Craig Link to comment Share on other sites More sharing options...
eddiekusa Posted July 24, 2008 Author Report Share Posted July 24, 2008 Only one disc so far has this problem, huh?You're hearing brush work for the first time.Put on "Kind of Blue" and you can really start looking for speaker problems.................that aren't there.Regards,Craig Link to comment Share on other sites More sharing options...
eddiekusa Posted July 24, 2008 Author Report Share Posted July 24, 2008 Craig, You made my day. I put Night Lights on again, this time listening and recognizing the rythym of the brushes as you suggested. Hard to believe that the speakers reveal something I never heard from this disc before. I'm impressed and very happy these Legacy II came my way. What else can you tell me? Ed Link to comment Share on other sites More sharing options...
Analogman Posted July 24, 2008 Report Share Posted July 24, 2008 Craig, You made my day. I put Night Lights on again, this time listening and recognizing the rythym of the brushes as you suggested. Hard to believe that the speakers reveal something I never heard from this disc before. I'm impressed and very happy these Legacy II came my way. What else can you tell me? EdResolution is a double edged sword.Enjoy,Craig Link to comment Share on other sites More sharing options...
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