Polk Audio LS90 Crossover Modification Thread

VR3
VR3 Posts: 28,746
edited May 2013 in DIY, Mods & Tweaks
This will be interesting and will be a true test to what I can fit on those plates of mine! :-P
- Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
Post edited by VR3 on
· Share on FacebookShare on Twitter

Comments

  • ken brydson
    ken brydson Posts: 8,772
    edited April 2013
    This one has my interest....
    · Share on FacebookShare on Twitter
  • drumiv
    drumiv Posts: 171
    edited May 2013
    I'm getting ready to recap/upgrade my LS90's. Are these the parts I'll need, and if yes, where to get them. Thanks.
    · Share on FacebookShare on Twitter
  • VR3
    VR3 Posts: 28,746
    edited May 2013
    Shoot me an email! :)
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
    · Share on FacebookShare on Twitter
  • treitz3
    treitz3 Posts: 19,145
    edited May 2013
    Are those inductors the size I'm thinking they are? If so, you could use them for exercise! My word.

    Tom
    ~ In search of accurate reproduction of music. Real sound is my reference and while perfection may not be attainable? If I chase it, I might just catch excellence. ~
    · Share on FacebookShare on Twitter
  • VR3
    VR3 Posts: 28,746
    edited May 2013
    Hmmm... I don't have them in front of me but they are maybe 2-2.5" in diameter
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
    · Share on FacebookShare on Twitter
  • treitz3
    treitz3 Posts: 19,145
    edited May 2013
    Oh, they looked to be much bigger than that in the photo. It looks to me like they would be around 6-7" in diameter. Those caps are much smaller than I thought.

    Tom
    ~ In search of accurate reproduction of music. Real sound is my reference and while perfection may not be attainable? If I chase it, I might just catch excellence. ~
    · Share on FacebookShare on Twitter
  • VR3
    VR3 Posts: 28,746
    edited May 2013
    Yeah - 6-7" diameter is pretty massive lol
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
    · Share on FacebookShare on Twitter
  • VR3
    VR3 Posts: 28,746
    edited May 2013
    Pics pics pics!
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
    · Share on FacebookShare on Twitter
  • VR3
    VR3 Posts: 28,746
    edited May 2013
    All done! :)
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
    · Share on FacebookShare on Twitter
  • robg997s
    robg997s Posts: 1
    edited May 2013
    I am the one that there crossovers were built for. I had a capacitor go bad on one speaker crossover. I thought replacing the capacitor would be sufficient. Along the reading path I found the discussion related to upgrading crossovers. My decision was made. For some background I am an EE BS/MS with over 30 years of piratical experience. I felt the upgraded crossover would make a difference by one that would be unnoticeable. Well I was wrong. My suggestion to those that have LS90s and love them, you have no idea what you are missing. If you have the cash (and it's nothing that will kill you) my recommendation is to contact Trey at 'VR3 Mods' <Vr3Mods@gmail.com>. Here are my first impressions:

    1. I have now listened to a range of music from Classical, Rock, and Alternative. The sound is much more ranging and true than ever before. The highs are higher and the lows lower. The speakers which were already excellent have now become even more incredible. I didn’t think it was possible.
    2. I seem to have the ability to throw more power at the speaker without distortion. Using a Hafler 9500 amp at the 2 o’clock position (250W very pure). Never got there before.
    3. Acoustical guitar where I thought before was awesome has gotten even better. I can very clearly hear fingers sliding up and down the guitar strings, very cool.
    4. Oddly where high volume would make my CalLabs CD player skip seems not to have this problem. This does not completely make sense and will need some further thought, But a nice side effect if it holds.
    5. In all, I’m happy with the investment which really did make a notable difference to already super speakers.
    6. I will post these impression on you web site (probably more as well), but need to head off to my next chores.

    Trey – thank you for your guidance along the way and the incredible craftsmanship. There are few out there that really understand basic engineering (resistors, capacitor, and inductors, and how they work), especially how it relates to and enhances audio. Great Job!!! Thank you.

    RECOMMENDATION - contact Trey and a least explore the concept (especially if you are reading this post). Good luck. Rob
    · Share on FacebookShare on Twitter