SDA 2b and DENON PMA-2000R

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  • Schurkey
    Schurkey Posts: 2,130
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    skipshot12 wrote: »

    From reading I can assume my blade/blade are not compatible?
    WHICH "blade/blade" speakers are you talking about?

    Blade/blade SDA 2B, and blade/blade SDA 1C can be made compatible with a piece of wire and suitable connectors. SDA 2A and 1B, and earlier versions, cannot.
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  • skipshot12
    skipshot12 Posts: 2,154
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    Schurkey wrote: »
    skipshot12 wrote: »

    From reading I can assume my blade/blade are not compatible?
    WHICH "blade/blade" speakers are you talking about?

    Blade/blade SDA 2B, and blade/blade SDA 1C can be made compatible with a piece of wire and suitable connectors. SDA 2A and 1B, and earlier versions, cannot.

    SDA SRS
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  • F1nut
    F1nut Posts: 52,406
    edited October 2022
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    From reading I can assume my blade/blade are not compatible?

    Depends.
    8szz6lpmdeh5.jpg


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  • skipshot12
    skipshot12 Posts: 2,154
    edited October 2022
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    F1nut wrote: »
    From reading I can assume my blade/blade are not compatible?

    Depends.
    8szz6lpmdeh5.jpg


    SDA SRS with serial # greater than 5001 are compatible with the AI-1?

    I shall take another look at my serial #’s…..

    I do know that my drivers are all dated 1986.
    Looking at the sda lookup I think my sda srs are version 3?
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  • skipshot12
    skipshot12 Posts: 2,154
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    Looks like no Dreadnought here...
    Serial #'s in the 3000's.

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  • Unknown
    Unknown
    edited October 2022
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  • Unknown
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  • alexanikin
    alexanikin Posts: 106
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    pitdogg2 wrote: »

    Pin/blade models only the pin carries the signal and the blade is for support or connection of ground for mono blocs or non-common amps.

    This is something that caught my eye. My 2B's didn't have an interconnect cable, so I made one connecting speakers only over pins. Two questions:
    1) is there a need to add a wire for blades too? (in case of amp with common ground)
    2) would it be helpful if Denon actually have no common ground?
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  • Unknown
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    edited November 2022
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  • alexanikin
    alexanikin Posts: 106
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    Hey everyone. Thank you for all your thoughts here in this thread. It turned out that the unit I wanted to get have problems with its faceplate, so I decided to pass. So in this thread, there is will no answer if its common ground or not :)
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  • DarqueKnight
    DarqueKnight Posts: 6,765
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    pitdogg2 wrote: »
    Why a Dreadnought works so well with common ground amps I cannot explain either but it does and many have confirmed it in spades. I used one on mine with my Carver TFM45, it made a pretty significant difference.

    The ground plane of an amplifier is a significant reservoir of electrical noise. The Dreadnought allows you to bypass that. Electrical noise has a particularly detrimental effect on the spatial properties of an amplifier, as well overall clarity and detail.
    pitdogg2 wrote: »
    The amplifier interface one (AI-1) cable had a small box built into the cable that had a tiny torrid transformer built into it. Research of this tiny transformer with the help of Matthew Polk lead to the development of the larger much better torrid transformers 800va-1000va dreadnoughts. @DarqueKnight provided the in depth research and development and named them dreadnoughts.

    I am not aware of any original AI-1 interfaces that used a small toroidal transformer. The AI-1s I have seen and read about in Polk's literature, and the AI-1 that I own, uses a tiny laminated steel transformer that is prone to saturate and increase distortion in the music. Matthew Polk advised using a non common ground interface based on a large, high current toroidal transformer. Large, high current, low-noise toroidal transformers were prohibitively expensive during the SDA era. High current, low noise toroidal transformers are still expensive.

    Proud and loyal citizen of the Digital Domain and Solid State Country!
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  • Unknown
    Unknown
    edited November 2022
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