Impedance for each SDA SRS speaker

thinman6
thinman6 Posts: 3
in Vintage Speakers
Looking thru the SDA SRS manual, I find nothing stating what the impedance is for each tower.

The reason I ask, is that on the amp ( Yamaha M85 ) I'm using , there are -3- switches ( 2 ohms, 4 ohms, 8 ohms ) on the front panel that should be matched up as close as possible to the impedance of the speaker.

One could assume that one could hook the leads from a digital multimeter and read the resistance. But I don't won't to assume....factual info is better.

Thanks in advance,
thinman6



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  • F1nut
    F1nut Posts: 50,546
    edited January 2017 Answer ✓
    The nominal impedance for the SDA SRS is 4 ohms. There are no specs available for the high or low pass, but you can bet the low pass is 4 ohm and lower.

    Try the different settings to decide which sounds best to you, but 4 ohm is going to be your best bet.
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  • F1nut
    F1nut Posts: 50,546
    Answer ✓
    thinman6 wrote: »
    As I have the option to bi-amp, knowing the impedance for the woofer per cabinet and the impedance for the 6 mid/high frequency speakers per cabinet would be helpful.
    THanks

    There is no woofer, that is a passive radiator.
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

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  • thinman6
    thinman6 Posts: 3
    Answer ✓
    F1nut..

    Thanks for the info...admittedly, my technical knowledge of electronics is
    limited. I've got it set on 4 ohms so I will most likely leave it as such.
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Answers

  • thinman6
    thinman6 Posts: 3
    As I have the option to bi-amp, knowing the impedance for the woofer per cabinet and the impedance for the 6 mid/high frequency speakers per cabinet would be helpful.
    THanks
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  • F1nut
    F1nut Posts: 50,546
    BTW, reading the resistance will not tell you the impedance.
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

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  • F1nut
    F1nut Posts: 50,546
    You should also be aware that you cannot use non-common ground, true dual mono or mono block amps with your speakers or very bad juju will happen.
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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  • stuwee
    stuwee Posts: 1,508
    F1nut, speaks the truth, do some research on impedance, it varies greatly in box speakers, usually lower in the low frequencies. Stability in low ohm loads, high current coupled with a nice dampening factor will do wonders for you in the amp department. Haha, then we can get into cables :p:D ...
    Thorens TD125MKII, SME3009,Shure V15/ Teac V-8000S, Denon DN-790R cass, Teac 3340 RtR decks, Onix CD2...Sumo Electra Plus pre>SAE A1001 amp>Martin Logan Summit's
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