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  1. #1

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    Default X/O upgrade evaluation

    Recently I had my Polk SDA-2B and Monitor 7C speaker crossovers upgraded
    with the help of ben62670. Ben did a great job: excellent workmanship and
    quick turnaround time plus he's a nice guy. My first impression is that, even
    going into this project with a bit of skepticism, these upgrades are the "real
    deal" and well worth the time and money even if they do not contiue to get
    better as the caps go through the burn-in period. It is as another member
    stated "like a blanket has been lifted off the speakers". I'm a believer! Much
    more of an improvement than I expected.

    Polk SDA-2B upgraded w/ Sonicaps, Solens & Mills
    used with CArver C-1 preamp and Carver M-1.5t amp (350 wpc)
    First observation: 2 hours burn-in time
    Wow! Immediate presence of more detailed and substantial imaging.
    Soundstage is 1 foot wider on each side and 1 foot deeper.
    Bass is lacking and somewhat muddled. Tweeters (SL2000), which
    previously were non-objectionable, are very bright and somewhat forward.
    Upper mid-range is slightly grainy.

    Polk Monitor 7C upgraded w/ Solens & Mills
    used with Carver 752 receiver (100 wpc) Sonic Holography engaged
    First observation: 2 hours burn-in time
    Very Nice! Not as much improvement as with the SDA's, but still very much
    improved. More detailed imaging. Soundstage was more accurately defined.
    Depth of soundstage increased by 2 feet while no increase in width was
    percieved. Imaging at the outer limits of soundstage was much more defined.
    Bass was immediately more solid and not as effected as with the SDA's.
    Tweeters (SL2000) are not nearly as bright as the SDA's with Sonicaps
    high pass caps.

    I might also note that I had Ben remove the poly switches in both sets of
    crossovers after reading Darqueknights recent post.

    Even though I like the SL2000 tweeters I may order a pair of RDO194-1
    replacement tweeters from Polk for the SDA's, but I think I'll proceed with
    the cap burn-in for a while before I decide.

    Does anyone know off the top of their head how long the burn-in period
    should take for these crossover caps?

    Thanks to all the members who have contributed to this forum with their
    informative posts which led to my decision to upgrade these Polk speakers,
    including ben62670, BlueMDpicker, Darqueknight, dorokkusai and Heiney9.

    Dennis
    PL 4000 II / PL 400 II x2 / PL 5100 II / PL 6000 II
    PL 7000 II / PL 1000 w/JDV mod x2 / PL 1100 II
    Carver C-1 / C-11 / C-4000t / M-1.0t (MKII opt 002)
    M-1.5t x2 / TFM-15 / TFM-22 x2 / TFM-24 x2
    TFM-45 x2 / HR-752 / DPL-33 / TD-1400 / TD-1700
    TDR-2400 / TX-12 / DTL-100 / SDA-490t
    Thorens 316 / Roberts 770X x2 / ADC SS3 MKII
    Polk SDA SRS / Polk SDA SRS 2.3 (XO upgrade)
    Polk SDA-2B (XO upgrade)
    Polk Monitor 12 & Monitor 5jr
    Polk Monitor 10B (XO upgrade)
    Polk Monitor 7C (XO upgrade)

  2. #2
    Audiophile
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    I have always burned mine in for at least 100 hours. For me, that is just leaving them hooked up to a tuner in the garage for a week, facing each other with a blanket over the top. I have done this with both new x-overs and new tweeters and it's worked great for both.

  3. #3

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    Thanks Dennis. The Sonicaps take a long timer to burn in. Some say up to 400hrs. The "generic caps usually take around 80-100 to be nearly burned in.
    Enjoy.
    Ben
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben

  4. #4

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    I have learned that burning in capasitors/resistors is like fine wine, better with age/time.

  5. #5

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    Default

    How much did it cost?

  6. #6

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    For which speakers? Parts, labor, both? What parts...
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben

  7. #7

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    All parts.

  8. #8

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    Which speaker, and which parts? I normally suggest Sonicaps on the highs, and Dayton's on the lows, or a cheaper soulution that is very respectable is all Dayton's.
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben

  9. #9

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    I too was skeptical about how much difference the X/O upgrade would make. I have been converted. The RDO194's may also surprise you. I installed RDO198 in my RTL11TLs and was very impressed with the openness. The X/O upgrade has taken it even further.

    I am very thankful for the advice found here in the Polk forums.
    Stan

    Main 2ch:
    Polk LSi15 (DB840 upgrade)
    Parasound: C/PT-600, HCA-800II; Denon: DVD-2910, DRM-800A; Monster HTS3600-MKII, Grado SR-225i

    HT:
    Denon AVR-888, Polk: RM7, PSW10, Marantz UD5005, Panasonic TC-P42S60

    Other stuff:
    Denon: DRA-835R, DRA-825R, DCD-660, DRM-700A, DRR-780; Polk: RTA11TL (RDO198-1, XO and Damping Upgrades), S8, Monitor 5A, TSi100; Pioneer CT-6R, PL-530; Onkyo CP-1046F; Ortofon OM5E, Marantz PM5004, CD5004

  10. #10

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    How much would it cost to have my whole crossover upgraded on both speakers shipped including labor? How much would the works cost and the cheapskate version cost?:D

  11. #11

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    Did you email me?
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben

  12. #12

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    No, not yet.:p

  13. #13

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    You guys make me want to upgrade my SDA2B's even more! As soon as some of my stuff sells, I'll be upgrading the X/O's. Great post!
    Good job Ben.
    Romans 1:16

  14. #14

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    One more thing...I got the new RD0194's and a new inter-connect cable from Polk and it improved the sound tremendously. nest step...X/O

  15. #15

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    Which IC cable? B/B, or P/B
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben

  16. #16

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    B/B...they had it in stock for ~$46 shipped. It looks kind of cheesy, but sounds good IMHO.
    I'll also be getting some of those sweet RCA cabs from you hopefully in the near future.

  17. #17

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    Quote Originally Posted by Conradicles View Post
    B/B...they had it in stock for ~$46 shipped. It looks kind of cheesy, but sounds good IMHO.
    I'll also be getting some of those sweet RCA cabs from you hopefully in the near future.
    I need to find out where to get the ends for the BB cable:(
    I think Daboyz still has 2 pair for sale silly cheap in the Flea Market.
    Ben
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben

  18. #18

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    or a cheaper soulution that is very respectable is all Dayton's
    Ben, I agree, I just recently had RTA 15TL X/O's upgraded with Dayton 1% caps and Mills resistors and with poly switches removed was very happy with the results. I went with RDO 198's and Mortite for the drivers as well and with burn in just about complete, I can't stop grinning every time I fire them up. New fabric for the screens and smoked plexiglass tops and the transformation is complete.

    Everyone of these upgrades/tweaks was a direct result of the advice and information shared on this forum, so thanks to all of you for that.

    Also, I like to thank Jake (ZINGO) for doing the X/O upgrade. Top notch work,good advice and a very nice guy.

    Happy Thanksgiving to everyone!

    Farrell

  19. #19
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    Quote Originally Posted by ben62670 View Post
    I need to find out where to get the ends for the BB cable:(
    Cinch-Jones Company (www.cinch.com). The part number is P-302-CCT. ;)

  20. #20
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    Thanks for the nod Ferrell and I always enjoy doing work for other members (it keeps me busy). I glad all of your upgrades came together so well and let's see some pictures!

  21. #21

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    Default SDA 1C XOs, shorter break-in via Isotek CD

    Quote Originally Posted by Dennis47 View Post
    Recently I had my Polk SDA-2B and Monitor 7C speaker crossovers upgraded
    with the help of ben62670. Ben did a great job: excellent workmanship and
    quick turnaround time plus he's a nice guy...

    Dennis
    The day after Thanksgiving I installed a pair of 1C crossovers that ben62670 upgraded. X2 on all the positive comments re: Ben - thanks ever so much.

    Additionally, I note that I commenced burning in the XO components by using the Isotek System Enhancer CD. The Isotek CD in my experience has always done a kicka@@ job in appreciably shortening the break-in period, and it has done it again. (I note that I copied the CD's track 2 to tape, and let the tape run 24 hrs/day through my system after installing the XOs.) I'll continue using the Isotek product for this work week simply because I can, but it seems the XOs are pretty much broken in at this point and are a "sound" / no-brainer improvement over the stock components.

    My only regret is not having done it much sooner. Kudos, Ben, and thanks for helping out this NH Polkie. For those who want to appreciably shorten component break-in, try the Isotek disc.

  22. #22

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    Thanks for the burn in link. I may build a jig to start burning in cables. I am a NE boy myself(CT). I spent a lot of time in VT, and NH. When the face fell off the old man of the mountain it really bugged me. You can keep the cold, but I will miss the streams, and jeeping with my 68 Bronco;)
    Thanks
    Ben
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben

  23. #23
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    I'd be willing to burn in the speakers on the bottom of the linked page! :D

  24. #24

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    ben62670 et al,

    The crossover upgrade kills...period. Mo' betta' everything, system never sounded so good. Gotta love that wonderful detail retrieval, bigger and deeper soundstage, heightened impact, improved instrument and voice positioning, etc.

    I concurrently did the Mortite tweek, which my gut tells me has enhanced my listening experience, too. Furthermore, I reapplied Walker SST to a few connectors; that tweak has always produced positive results, too.

    With the snow coming down this morning, and Christmas music wafting through the house and halls, all's right today in wintery NH. ;)

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