SDA-1C crossover questions

jmitchnh
jmitchnh Posts: 31
edited March 2010 in DIY, Mods & Tweaks
I recently acquired a pair of very mint Polk Audio SDA-1Cs. The detail, accuracy and clarity of these speakers are amazing and are unlike anything I’ve ever heard before. From what I’ve read, all of the four 6.5” drivers per cabinet are used when the interconnect cable is attached to create the “SDA” effect, and only two when it is not attached. True?

Since my listening room is not large enough to enable me to set these up correctly to gain the full SDA effect and more than likely I’ll never use the interconnect cable, I’m wondering if it would be wise to re-wire the crossovers to allow all four drivers to operate with out the cable?

From what I’ve read, some SDA owners have done this mod with excellent results. Has anyone else tried this mod and if so, how did it work out and are there instructions for this mod anywhere on the web?

Thanks in advance for your help!
Life's too short too listen to bad speakers
Post edited by jmitchnh on
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Comments

  • Toolfan66
    Toolfan66 Posts: 17,980
    edited March 2010
    Yes on the SDA effect with the cable..

    NO DO NOT REWIRE THEM!!!! Set them up the best you can and use the interconnect cable.. They will sound awesome as is..

    What are you going to power them with???

    Welcome to the club BTW..
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  • zarrdoss
    zarrdoss Posts: 2,562
    edited March 2010
    I really don't see how this would have positive results, take away the SDA affect and they're just another pair of speakers.
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  • jmitchnh
    jmitchnh Posts: 31
    edited March 2010
    TOOLFORLIFEFAN wrote: »
    Yes on the SDA effect with the cable..

    NO DO NOT REWIRE THEM!!!! Set them up the best you can and use the interconnect cable.. They will sound awesome as is..

    What are you going to power them with???

    Welcome to the club BTW..

    Running them with an Adcom GFP 555II pre and an Onkyo M504 amp
    Life's too short too listen to bad speakers
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  • Toolfan66
    Toolfan66 Posts: 17,980
    edited March 2010
    Just make sure you tie the negative terminals together on the back of your amp if you have not done it already, and all should be good.. I am refurbishing a set of 1C's now..

    Enjoy.
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  • jmitchnh
    jmitchnh Posts: 31
    edited March 2010
    After lots of researching, I've finally got this sorted out. My amp is a common ground so all I needed was a wire to connect the "pin" on each speaker. I've spaced and aligned the cabinets as best I can in my listening area and sat down and really listened. These speakers are absolutely AMAZING!!! It sounds as if the entire rear wall is a speaker with a truly 3-D soundstage. The SDA effect gives be large room acoustics and dynamics in a small space. The sound, while spacious, is so defined and articulate it's scary. The more I listen, the more I want to listen! Now, off to contemplate the RDO upgrade...
    Life's too short too listen to bad speakers
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  • zingo
    zingo Posts: 11,258
    edited March 2010
    Congrats on the new speakers and great results!
    Jake
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