RTA 12B "Scatter-wound" Crossover coils?

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Odd I/O
Odd I/O Posts: 13
edited January 2008 in Basic Hookup/Wiring Questions
Hello all, I am curious about the crossovers in a pair of RTA 12B that I have. They appear to be hand-wound. Did Polk hand wind their coils? Maybe these were Re-winds by a previous owner. The speakers sound absolutely fantastic, so I'm not complaining, just curious --- here are some pics:

IMG_0542.jpg

IMG_0543.jpg
...i'm a picker, i'm a grinner, i'm a lover, and i'm a sinner; I play my music in the Sun...
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  • danger boy
    danger boy Posts: 15,722
    edited December 2007
    those are original coil winds from Polk.... on the back of your SL1000 tweeter it will have a date of manufacture.. or pretty close to it. if you are curious about the age of your RTA12's
    PolkFest 2012, who's going>?
    Vancouver, Canada Sept 30th, 2012 - Madonna concert :cheesygrin:
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  • Odd I/O
    Odd I/O Posts: 13
    edited December 2007
    danger boy wrote: »
    those are original coil winds from Polk.... on the back of your SL1000 tweeter it will have a date of manufacture.. or pretty close to it. if you are curious about the age of your RTA12's

    Thanx!
    ---yep and all info on the back of the tweeters is hand written as well. I am extremely impressed with the workmanship that went into these speakers... And the presence of the sound that they put out is as good as the Magneplanars I have been using ---- The Maggies, though are really tricky to place for a listening "sweet spot" ---- I've already found several good spots for these Polks ---- Wow and DOUBLE WOW!!!
    ...i'm a picker, i'm a grinner, i'm a lover, and i'm a sinner; I play my music in the Sun...
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  • ben62670
    ben62670 Posts: 15,969
    edited December 2007
    If you can solder in the least change your caps for the biggest improvement.

    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
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  • Odd I/O
    Odd I/O Posts: 13
    edited December 2007
    ben62670 wrote: »
    If you can solder in the least change your caps for the biggest improvement.

    Enjoy

    Ben
    Excellent idea --thanx! It would be an easy job since the caps are all easily accessable
    If you have any recommendations for particular types of caps, your input will be more than welcome. Thanx again, Ben
    ...i'm a picker, i'm a grinner, i'm a lover, and i'm a sinner; I play my music in the Sun...
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  • ben62670
    ben62670 Posts: 15,969
    edited December 2007
    Here is the wiring diagram

    http://www.polkaudio.com/forums/showthread.php?t=38755

    (Yours is the original with the fuses)

    I would personally go with Solen's on the large value caps, and sonicaps on the rest. The 27uf caps pretty much just bleed off to ground (the signal does not pass through the big caps, and pass on to a driver/drivers), and are not quite are crucial. Also I would replace the resistors with mills of the same value(uf). The little tiny caps can be omitted(bypass caps) with good results. I would do this before doing the tweeters, if both the tweeters sound the same.
    Have fun. Its definitely a worth while upgrade.
    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
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  • ohskigod
    ohskigod Posts: 6,501
    edited January 2008
    thats a good speaker you have there. was my first "real" speaker that I liked. it was my doorway into finer audio
    Living Room 2 Channel -
    Wiim Ultra. Jolida CD player. Fiio k11 R2R DAC, XTZ as300 Edge amp. Focal Cobalt 826 towers,

    Upstairs 2 Channel Rig -
    Audiophonics AB310 preamp, DIY1200as2 Icepower Amp, Wiim pro streamer and Topping E70 Velvet DAC, California Audio Labs DX1 CD player, Polk LSi9 with modified crossovers.

    Studio Rig - Scarlett 18i20(Gen3) DAW, Schitt Saga 2 preamp, Topping a90 headphone amp, Mac Mini, Audiophonics Hypex NC252m amp, Polk r200's
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