SDA-SRS Quickie!

jfb4548
jfb4548 Posts: 168
edited December 2005 in Vintage Speakers
I know I read about this once before but I'll ask again anyway! What tap should I run my SDA-SRS from on my power amp? It seems to me they are 6 ohm so do I go down to the 4 ohm tap or up to the 8 ohm tap??

Thanks as always! :)
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  • Emlyn
    Emlyn Posts: 4,535
    edited December 2005
    4 ohm.
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  • jfb4548
    jfb4548 Posts: 168
    edited December 2005
    Emlyn wrote:
    4 ohm.


    I thought so! Thank you
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  • BobMcG
    BobMcG Posts: 1,585
    edited December 2005
    I believe the SDA-SRSs are rated at a nominal impedence of 4 ohms anyways.

    Other interesting ratings in case one has forgotten:
    Frequency response - 10 Hz- 26,000Hz
    Crossover Frequency - 45 Hz and 2000Hz
    Max output level - 125dB
    Effiiciency - 93dB
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  • Tour2ma
    Tour2ma Posts: 10,177
    edited December 2005
    There's a couple different nom imp's quoted for the SRS's. Some state 6 ohm, my manual states 5 ohm.
    More later,
    Tour...
    Vox Copuli
    Better to remain silent and be thought a fool, than to open your mouth and remove all doubt. - Old English Proverb

    "Death doesn't come with a Uhaul." - Dennis Gardner
    "It's easy to get lost in price vs performance vs ego vs illusion." - doro
    "There is a certain entertainment value in ripping the occaisonal (sic) buttmunch..." - TroyD
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  • BobMcG
    BobMcG Posts: 1,585
    edited December 2005
    What else is new with Polk and their model lines?

    Lets see, original SDA-SRSs... they were made in '85, '86, '87, '88... I only have spec sheets dated '86, '87, and '88. At least the sheets I have all have them at 4 ohms and is what I was going by. Doesn't make it written in stone though as we have found sometimes.
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  • jfb4548
    jfb4548 Posts: 168
    edited December 2005
    Tour2ma wrote:
    There's a couple different nom imp's quoted for the SRS's. Some state 6 ohm, my manual states 5 ohm.


    Hum. My owners manual says 6 ohms. But then again when I removed my cross over to have a look it didn't look much like the ones pictured in the upgrade thread, so maybe Matthew changed things as he went along?
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  • Tour2ma
    Tour2ma Posts: 10,177
    edited December 2005
    Hey Bob,
    Actually I meant to type 4-ohm, not 6 in my initial reply... :)

    jfb,
    6-ohm came into play when the 1.2's came along. Regardless, 4, 5, or 6-ohm, the 4-ohms taps are the ones to use.

    Had I noticed your posts sooner, I'd have looked you up. I've been sitting in Parma for the past week.

    EDIT: 4-ohm tap, not 6-ohm...
    More later,
    Tour...
    Vox Copuli
    Better to remain silent and be thought a fool, than to open your mouth and remove all doubt. - Old English Proverb

    "Death doesn't come with a Uhaul." - Dennis Gardner
    "It's easy to get lost in price vs performance vs ego vs illusion." - doro
    "There is a certain entertainment value in ripping the occaisonal (sic) buttmunch..." - TroyD
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  • jfb4548
    jfb4548 Posts: 168
    edited December 2005
    Tour2ma wrote:
    Hey Bob,
    Actually I meant to type 4-ohm, not 6 in my initial reply... :)

    jfb,
    6-ohm came into play when the 1.2's came along. Regardless, 4, 5, or 6-ohm, the 6-ohms taps are the ones to use.

    Had I noticed your posts sooner, I'd have looked you up. I've been sitting in Parma for the past week.


    Parma! Sorry we didn't hook up! I work in Downtown Cleveland...not to far from Parma. But still my owners manual says 6 Ohms! :)
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  • jfb4548
    jfb4548 Posts: 168
    edited December 2005
    jfb4548 wrote:
    Parma! Sorry we didn't hook up! I work in Downtown Cleveland...not to far from Parma. But still my owners manual says 6 Ohms! :)


    Now you got me thinking and that's not good! I'm going to have to dig out my owners manual when I get home and reread the specs! Either way my amps all are 2 ohm, 4 ohm or 8 ohm so the 4 ohm tap is still my best bet?
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  • Tour2ma
    Tour2ma Posts: 10,177
    edited December 2005
    Yup... Even for 8-ohm speakers, many folks perfer using the lowest ohm outputs their amp has...

    What amp are you running?
    More later,
    Tour...
    Vox Copuli
    Better to remain silent and be thought a fool, than to open your mouth and remove all doubt. - Old English Proverb

    "Death doesn't come with a Uhaul." - Dennis Gardner
    "It's easy to get lost in price vs performance vs ego vs illusion." - doro
    "There is a certain entertainment value in ripping the occaisonal (sic) buttmunch..." - TroyD
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  • jfb4548
    jfb4548 Posts: 168
    edited December 2005
    Tour2ma wrote:
    Yup... Even for 8-ohm speakers, many folks perfer using the lowest ohm outputs their amp has...

    What amp are you running?


    Right now I'm running my vintage McIntosh MC2205 but my main amp is a MC7270. Just a bit newer and a lot more balls!
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  • jfb4548
    jfb4548 Posts: 168
    edited December 2005
    I dug out my owners manual and it say's 5 ohms not 6! I guess my memory is really shot! :rolleyes:
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  • Tour2ma
    Tour2ma Posts: 10,177
    edited December 2005
    Not like 5-ohm is a common impedance rating...

    Back in Tejas now, but hope to be back on America's North Coast come spring...
    More later,
    Tour...
    Vox Copuli
    Better to remain silent and be thought a fool, than to open your mouth and remove all doubt. - Old English Proverb

    "Death doesn't come with a Uhaul." - Dennis Gardner
    "It's easy to get lost in price vs performance vs ego vs illusion." - doro
    "There is a certain entertainment value in ripping the occaisonal (sic) buttmunch..." - TroyD
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  • jfb4548
    jfb4548 Posts: 168
    edited December 2005
    Tour2ma wrote:
    Not like 5-ohm is a common impedance rating...

    Back in Tejas now, but hope to be back on America's North Coast come spring...


    Your lucky to be out of here! Snow and cold are the rule of the day. Did I mention COLD? :(

    The good to come out of all this is messing around trying various hook ups I found my IC between the pre and amp was messed up. New cables in place and no more problems man! To think I swapped every piece and some twice because of a stupid cable! :rolleyes: These dang amps tip the scales at like 80 lbs and my old back aint what it used to be!
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  • djf
    djf Posts: 120
    edited December 2005
    Tour2ma wrote:
    There's a couple different nom imp's quoted for the SRS's. Some state 6 ohm, my manual states 5 ohm.

    My manual doesn't even call it "impedance", it calls it plain old "D.C. Resistance"

    5 Ohms

    I'm kinda mad, cause I had the manual in a box, which for some reason I put in my truck, so it got a bit damp and got kinda moldy on me. Oh well, at least the speakers are shiny!
    And it's almost their b-day. I pulled the mids, they said Nov 18, 1985. But the tweets (SL-2000's) Say Jan 2, 1986.

    Currently: Live Bullet
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