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  1. #1
    Join Date
    Apr 2012
    Location
    Willowbrook Il
    Posts
    421

    Default Infinity RSe crossover rebuild?

    Hi Guys: I'm thinking about rebuilding the crossovers on a very old pair of RSe's. I replaced the surrounds a couple years ago which is what got me started with this speaker building stuff.

    Anyway, I've always hated the little spring loaded binding posts, so I'd replace those.

    The tweeter L-pads don't seem to work anymore, or my ears are too old to hear them work, and I worry the caps are so old that they're no longer what they claim to be.

    When I re-did the surrounds, I also bought a "By-Pass" cap the guy who sold me the surrounds recomended. It's a .1 uf Dayton that did seem to smooth out the tweeter some at the time. It's paralled with an 8.5 uf. cause that's what he told me to do. (good, bad, or indifferent?)

    The inductors I'd have to measure, but I wanted to hear what you all thought before I pull the crossovers apart.

    I would also brace the box a little, silicone the seems, add a better gasket to the woofer, along with adding some Sonic Barrier to the back.

    So, if you please, take a look at the pic and let me know if you think it would be worth while or not. Thanks Mark
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  2. #2
    Join Date
    Jan 2010
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    North
    Posts
    1,204

    Default Re: Infinity RSe crossover rebuild?

    I'd replace both those old electrolytic caps, as well as the l-pad. You could try cleaning the l-pad with contact cleaner, but I've found a few in old speakers that are worn beyond repair, so putting a new part in there is the best bet. If you're turning the knob and can't hear any change in sound, the l-pad is likely responsible for any poor sound that you're getting out of these speakers.

    I didn't look up this particular model, but do any of the drivers have foam surround? I'd be more worried about that than anything else. Old foam surrounds turn to dust.
    Do It Someone Else.

  3. #3
    Join Date
    Dec 2009
    Location
    Rockford, IL
    Posts
    3,130

    Default Re: Infinity RSe crossover rebuild?

    I'd just replace the adjustable L-pad and the 2 silver electrolytic capacitors with poly film caps. The inductors, the existing 8.5 film cap, and resistors should be just fine and replacing them wouldn't really improve things.
    Craig

    "I used to drive WAY too fast to worry about cholesterol. Now I worry about my blood pressure."

    Why I don't spray in first gear: http://s1138.photobucket.com/albums/...t=100_2585.mp4

  4. #4
    Join Date
    Apr 2012
    Location
    Willowbrook Il
    Posts
    421

    Default Re: Infinity RSe crossover rebuild?

    Thanks guys! I replaced the surrounds a couple of years ago and they are still in fine shape.

    I guess I'll replace all the caps and the L-pad, along with the binding posts. I really hate those spring loaded jobies!

    So you really don't think replacing that huge inductor that looks like a transformer would do any good?

  5. #5
    Join Date
    Jan 2010
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    North
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    1,204

    Default Re: Infinity RSe crossover rebuild?

    Quote Originally Posted by Psycoacoustics View Post
    So you really don't think replacing that huge inductor that looks like a transformer would do any good?
    Nope, that's a waste of time and money. Leave it as-is.
    Do It Someone Else.

  6. #6
    Join Date
    Jan 2012
    Location
    Morgantown, WV
    Posts
    711

    Default Re: Infinity RSe crossover rebuild?

    I've got a pair of them too. I love their tweeter. Let me know how yours turns out, I may end up doing mine as well.

  7. #7
    Join Date
    Jan 2010
    Location
    North
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    Default Re: Infinity RSe crossover rebuild?

    Ok, so I looked up this model. Uses the same tweeter as the RSA's that I purchased locally. I did a DIY refoam on the woofers, and plan to reuse them in another project. However I'm still undecided on the tweeter. I don't have any immediate use for them, so if any of you gents would like my pair, I am willing to sell. I had them on the classifieds section a while back for I think $60 for the pair, but no biters. Make me an offer.

    My project that is in a yet-to-be-started phase, will be a 3-way using all recycled parts, in other words all speakers that were pulled from something else. 10" Infinity woofer from the RSA, 3" Tang-Band midrange from Logitech Z-560, and tweeters are ESS AMT, I don't recall the model they came from, but they're not the top-end model that everyone drools over.
    Do It Someone Else.

  8. #8
    Join Date
    Apr 2012
    Location
    Willowbrook Il
    Posts
    421

    Default Re: Infinity RSe crossover rebuild?

    Quote Originally Posted by Adam_G View Post
    I've got a pair of them too. I love their tweeter. Let me know how yours turns out, I may end up doing mine as well.
    Will do buddy! I'll be ordering parts tomorrow and probably work on them next week.

    One more question. How close do I have to come to the cap values? Does a couple of points in either direction make any real difference?

  9. #9
    Join Date
    Oct 2005
    Location
    Tumwater, Wa.
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    5,480
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    Default Re: Infinity RSe crossover rebuild?

    IIRC, within 10% is acceptable, so a few decimal points in either direction shouldn't matter too much. Probably not enough to be able to hear a difference. Unless you can do some measurements and would be willing to design a new XO from scratch, getting some new poly caps and a new L-pad is about the best you can do with the stock XO. Let us know how it turns out.


    John A.
    Four wheels move your body, two wheels move your soul.

    "Children play with b-a-l-l-s and sticks, men race, and real men race motorcycles" - John Surtees

    Emotiva UPA-2, USP-1, ERC-1 CD
    Yamaha KX-390 HX-Pro cassette
    Pioneer TX-9500 II tuner
    Yamaha YP-211 w/Grado GF3E+
    Statement Monitors

    Photos:
    http://custom.smugmug.com/Electronic...#4114714_cGTBx

    Blogs:
    http://techtalk.parts-express.com/blog.php?u=2003

  10. #10
    Join Date
    Apr 2012
    Location
    Willowbrook Il
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    421

    Default Re: Infinity RSe crossover rebuild?

    Quote Originally Posted by johnastockman View Post
    IIRC, within 10% is acceptable, so a few decimal points in either direction shouldn't matter too much. Probably not enough to be able to hear a difference. Unless you can do some measurements and would be willing to design a new XO from scratch, getting some new poly caps and a new L-pad is about the best you can do with the stock XO. Let us know how it turns out.


    John A.
    So if one cap is 8.5uf and I buy a 8.2uf,,, that would be OK? The other one is 12.5, and I can only find a 12uf. Would that be OK too, or should I go up in value instead of down?

    Or do I buy some smaller values to add them up to get to the same value I have?

    I know I've read this before, but I'm old and dense, when trying to add up to the exact value do I series them or parallel them?

  11. #11
    Join Date
    Dec 2009
    Location
    Rockford, IL
    Posts
    3,130

    Default Re: Infinity RSe crossover rebuild?

    I bet I couldn't hear the difference between 8.5 and 8.2. But if you want to be dead nuts on you certainly can parallel caps that add up to the correct value.
    Craig

    "I used to drive WAY too fast to worry about cholesterol. Now I worry about my blood pressure."

    Why I don't spray in first gear: http://s1138.photobucket.com/albums/...t=100_2585.mp4

  12. #12
    Join Date
    Apr 2012
    Location
    Willowbrook Il
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    421

    Default Re: Infinity RSe crossover rebuild?

    Quote Originally Posted by PWR RYD View Post
    I bet I couldn't hear the difference between 8.5 and 8.2. But if you want to be dead nuts on you certainly can parallel caps that add up to the correct value.
    Thanks Buddy! Parallel it is. Can you refresh my memory? If I wire them in series what happens?

  13. #13

    Default Re: Infinity RSe crossover rebuild?

    Quote Originally Posted by Psycoacoustics View Post
    The tweeter L-pads don't seem to work anymore, or my ears are too old to hear them work, and I worry the caps are so old that they're no longer what they claim to be.
    Looking at the picture, it doesn't appear to be an L-pad since only two of the three terminals are being used. I'd say that it's a wire wound potentiometer (pot) being utilized as a rheostat. I seriously doubt the potentiometer is worn out since it doesn't get turned very often. If you have, know how to use an ohmmeter/multimeter you can easily test the pot.

  14. #14

    Default Re: Infinity RSe crossover rebuild?

    Quote Originally Posted by johnastockman View Post
    IIRC, within 10% is acceptable, so a few decimal points in either direction shouldn't matter too much. Probably not enough to be able to hear a difference. Unless you can do some measurements and would be willing to design a new XO from scratch, getting some new poly caps and a new L-pad is about the best you can do with the stock XO. Let us know how it turns out.

    John A.
    Doesn't look like an L-pad to me.

  15. #15
    Join Date
    Oct 2005
    Location
    Tumwater, Wa.
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    Default Re: Infinity RSe crossover rebuild?

    I can't recall myself with a series hook-up. Coils in series add up for total inductance, but I think I'm a bit dense too regarding the caps. What I've done is get some of those small-value caps to get the exact value. I keep a few on hand, like .1uF, .47uF, .22uF, .33uF and .68uF. The Dayton poly caps in those values are under $1, so I've accumulated a nice selection over the years, just adding in a few with each order. That way you can match up really close to the spec value. Being slightly OCD about speaker things, I can get the right value. With these Statement Monitor tweeter XO's, I paralleled 3 caps to get the exact value; one regular 3.3uF poly and two small-value caps of .1uF and .22uF get the target 3.6uF.




    With a commercial speaker, there are already many compromises in place, especially with the XO, so get as close as you can, like an 8.2uF for an 8.5uF, or vice-versa, and you'll be fine.


    John A.
    Four wheels move your body, two wheels move your soul.

    "Children play with b-a-l-l-s and sticks, men race, and real men race motorcycles" - John Surtees

    Emotiva UPA-2, USP-1, ERC-1 CD
    Yamaha KX-390 HX-Pro cassette
    Pioneer TX-9500 II tuner
    Yamaha YP-211 w/Grado GF3E+
    Statement Monitors

    Photos:
    http://custom.smugmug.com/Electronic...#4114714_cGTBx

    Blogs:
    http://techtalk.parts-express.com/blog.php?u=2003

  16. #16
    Join Date
    Jan 2012
    Location
    Morgantown, WV
    Posts
    711

    Default Re: Infinity RSe crossover rebuild?

    I was just wondering how this turned out, as I was considering doing the same here this winter. Let me know what you though!

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