Want to upgrade capacitors on my LS90
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pmalla1
Posts: 2
Hey guys, first post here. So I have a 20 year old pair of mint condition ls90s I acquired from my father. I love these speakers and they sound amazing. However I really would like to refresh the crossovers on them, specifically the capacitors. I would like to know specifically which capacitors you recommend. Currently I am looking at Dayton polypropylene 1%. Please post any advice, exact parts, ohm and voltage rating I should get. Also if anyone has the original and revised crossover schematic that would be amazing! Thank you!
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"....not everything that can be counted counts, and not everything that counts can be counted." William Bruce Cameron, Informal Sociology: A Casual Introduction to Sociological Thinking (1963)
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Daytons would not be my 1st choice.Home Theater/2 Channel:
Front: SDA-2ATL forum.polkaudio.com/discussion/143984/my-2as-finally-finished-almost/p1
Center: Custom Built forum.polkaudio.com/discussion/150760/my-center-channel-project/p1
Surrounds & Rears: Custom Built forum.polkaudio.com/discussion/151647/my-surround-project/p1
Sonicaps, Mills, RDO-194s-198s, Dynamat, Hurricane Nuts, Blackhole5
Pioneer Elite VSX-72TXV, Carver PM-600, SVS PB2-Plus Subwoofer
dhsspeakerservice.com/ -
It would be best to pull a crossover to verify the values. For caps, look at Sonicap or Clarity, both are far better than Dayton. You should upgrade the resistors while you're at it. I prefer Mills.Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
Thanks for all the help guys! So I did upgrade them to Dayton polypropylene 250v 1%, but to be honest I'm not happy with them. I have noise during silent parts of a song and they sound to "edgy" and sharp. I may upgrade in the next few weeks to sonic or clarity.
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The noise isn't the caps, unless defective. More likely a bad solder joint.
Caps need 200 hours to burn in, some much longer. That said, those will still be edgy and sharp.
Did you upgrade the resistors?Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
I'm guilty of that on the recap of my Bose 901 V equalizer I did a couple years ago. Had to go back in and reflow the joints to one cap. Yup...lots of hum until I got it right.The noise isn't the caps, unless defective. More likely a bad solder joint.
I would NOT have said it hummed during "silent parts", this was obvious as heck 100% of the time.
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This^^^^^^^The noise isn't the caps, unless defective. More likely a bad solder joint.
Caps need 200 hours to burn in, some much longer. That said, those will still be edgy and sharp.
Did you upgrade the resistors?
If you want to do a conservative upgrade, the Clarity PX line is much better than the Daytons. Most of us prefer Sonicaps or Clarity ESAs, but they're more expensive. If you haven't done it, replace all the resistors with Mills MRA-12s from Sonic Craft, or Mundorf MOX from Madisound.
Do not but Mills resistors from Parts Express. The carry the Mexican variety. Sonic Craft still has US made Mills.Home Theater/2 Channel:
Front: SDA-2ATL forum.polkaudio.com/discussion/143984/my-2as-finally-finished-almost/p1
Center: Custom Built forum.polkaudio.com/discussion/150760/my-center-channel-project/p1
Surrounds & Rears: Custom Built forum.polkaudio.com/discussion/151647/my-surround-project/p1
Sonicaps, Mills, RDO-194s-198s, Dynamat, Hurricane Nuts, Blackhole5
Pioneer Elite VSX-72TXV, Carver PM-600, SVS PB2-Plus Subwoofer
dhsspeakerservice.com/
