SDA CRS+ Crossover recap

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Comments

  • DeRod
    DeRod Posts: 229
    @F1nut I agree, I should upgrade those stands a bit. They do have some rubber pads on the feet and on the tops where the speaker sits.

    I think the next thing I would like to do with these is a really nice veneer. That dyed maple you showed me a while back would look crazy on these.
    "Equality is a myth to protect the weak. Some of us are strong in the Force, others are not. Only a fool believes otherwise." - Sith Proverb.
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  • heiney9
    heiney9 Posts: 25,395
    Nice work. Do yourself and your ears a favor and get rid of the sl2000 tweeters and get the RD0-194's. They are plug n play designed by Polk to "fix" the issues the sl2000 has.

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Puritan Audio PSM136 Pwr Condtioner & Classic PC's | Legend L600 | Roon Nucleus 1 w/LPS - Tubes add soul!
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  • pitdogg2
    pitdogg2 Posts: 26,915
    4.1tl mod.......





    😎
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  • DeRod
    DeRod Posts: 229
    edited November 15
    @heiney9 I have a pair of RD0-194, but I just wanted to listen to the speakers as is with the original tweeters. I'll probably switch the tweeters out next week to hear the difference. For some reason the SL2000 doesn't seem as annoying in the SDAs as in the monitors.

    @pitdogg2 with the 4.1tl mod what are the benefits? I've been told that to upgrade to the RD0198-1 is relatively easy as well.




    "Equality is a myth to protect the weak. Some of us are strong in the Force, others are not. Only a fool believes otherwise." - Sith Proverb.
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  • pitdogg2
    pitdogg2 Posts: 26,915
    It gives you the ability to use the RD-0198 tweeter. 5.8uf cap across the 2.7 ohm resistor and add a large faston on white ground wire to tweeter.

    https://us.v-cdn.net/5021930/uploads/attachments/1/8/5/1/1/26710.pdf
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  • heiney9
    heiney9 Posts: 25,395
    Just remember which ever RD0 you choose, give them ample break in time before forming an opinion.

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Puritan Audio PSM136 Pwr Condtioner & Classic PC's | Legend L600 | Roon Nucleus 1 w/LPS - Tubes add soul!
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  • DeRod
    DeRod Posts: 229
    edited November 16
    The RD0-194 I have currently reside in a pair of monitor 5Bs I’ve been playing with.

    BTW - Tweeters don’t break in. 😂😂 they sound exactly the same as when I first bought them.

    The woofers on some of my other more expensive speaker did require some break in time but the Audax tweeter those came with sound exactly the same as the first day.
    "Equality is a myth to protect the weak. Some of us are strong in the Force, others are not. Only a fool believes otherwise." - Sith Proverb.
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  • Gardenstater
    Gardenstater Posts: 4,718
    Check out these two threads which show how WMG and xschop approached the issue of backwave control in these. Also check out how WMG did his boards, not that yours aren't fine 😉

    https://forum.polkaudio.com/discussion/169838/sda-crs-crs-something-different/p1

    https://forum.polkaudio.com/discussion/177189/take-a-guess/p1

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    George / NJ

    Polk 7B main speakers, std. mods+ (1979, orig owner)
    Martin Logan Dynamo sub w/6ft 14awg Power Cord
    Onkyo A-8017 integrated
    Logitech Squeezebox Touch Streamer w/EDO applet
    iFi nano iDSD DAC
    iPurifier3
    iDefender w/ iPower PS
    Custom Steve Wilson 1m UPOCC Interconnect
    iFi Mercury 0.5m OFHC continuous cast copper USB cable
    Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
    Custom Vibration Isolation Speaker Stands and Sub Platform
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  • Gardenstater
    Gardenstater Posts: 4,718
    WMGs crossover above was the tl mod. You could use that as a template if you ever decided to go that route.
    George / NJ

    Polk 7B main speakers, std. mods+ (1979, orig owner)
    Martin Logan Dynamo sub w/6ft 14awg Power Cord
    Onkyo A-8017 integrated
    Logitech Squeezebox Touch Streamer w/EDO applet
    iFi nano iDSD DAC
    iPurifier3
    iDefender w/ iPower PS
    Custom Steve Wilson 1m UPOCC Interconnect
    iFi Mercury 0.5m OFHC continuous cast copper USB cable
    Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
    Custom Vibration Isolation Speaker Stands and Sub Platform
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  • mwk1001
    mwk1001 Posts: 1
    edited December 3
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    This has long been on my list of diy upgrades, now retired I think this has my name all over it. Any chance you have the source / part# for the parts, I would like to do the same mods, I blew out the woofer years ago and replaced them and updated the tweeter to SL3000 ?? I believe ... cant find the paperwork any longer. But did have the schematic update for the newer tweeter. ru8wsvz4c8oj.jpg
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  • VR3
    VR3 Posts: 29,382
    How tall are you?? 👀👀😁😁
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • Gardenstater
    Gardenstater Posts: 4,718
    edited December 3
    @mwk1001 When I zoomed in on your photo I didn't see any foam ring so it must be that you bought the RD0198-1 silk dome upgraded ones. Check and make sure you have RD0198 (5.39 Ohms) and not RD0194 (6.6 Ohms).

    You already did most of the homework by grabbing the schematic. I think if you read that link above he said that he only did the low pass inductors for the midwoofers and he used Jantzens. you could find them maybe at partsconnexion.com. He used Sonicaps from soniccraft.com which are highly favored around here, for all the caps and Vishay/Mills 12 W resistors.

    Oh, for the sub bass inductor he used Erse Super Q? For that you will have to look at Uscoils.us.
    George / NJ

    Polk 7B main speakers, std. mods+ (1979, orig owner)
    Martin Logan Dynamo sub w/6ft 14awg Power Cord
    Onkyo A-8017 integrated
    Logitech Squeezebox Touch Streamer w/EDO applet
    iFi nano iDSD DAC
    iPurifier3
    iDefender w/ iPower PS
    Custom Steve Wilson 1m UPOCC Interconnect
    iFi Mercury 0.5m OFHC continuous cast copper USB cable
    Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
    Custom Vibration Isolation Speaker Stands and Sub Platform
    · Share on FacebookShare on Twitter