need some advice

jimitbone
jimitbone Posts: 17
edited April 2007 in Vintage Speakers
what are your suggestions for amps to power a pair of sda srs 2 i am running a carver m4.0 now and have all kinds of problems they don't seem to be a very good match i've had the amp for close to 20 years and can't part with it i gave up a pair of sda speakers but after several years found that i couldn't live with out them so now i'm back where i started
Post edited by jimitbone on
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  • strider
    strider Posts: 2,568
    edited April 2007
    What type of problems are you having with the Carver?
    Wristwatch--->Crisco
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  • Auraka
    Auraka Posts: 18
    edited April 2007
    Which version, 3rd or 4th gen SRS2? 3rd should be 4Ω nominal, 4th should be 6Ω. If the earlier version maybe the speakers are making the amp unstable?

    I'm running a 4.0t with 1C's, which should be close to the 4th gen SRS2.
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  • Ron Temple
    Ron Temple Posts: 3,212
    edited April 2007
    Maybe it's time to have the amp serviced. It should be plenty and mate well, unless you are looking for a bright sound.

    Combo rig:

    Onkyo NR1007 pre-pro, Carver TFM 45(fronts), Carver TFM 35 (surrounds)
    SDA 1C, CS400i, SDA 2B
    PB13Ultra RO
    BW Silvers
    Oppo BDP-83SE
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  • jimitbone
    jimitbone Posts: 17
    edited April 2007
    i just had the 4.ot and the c1pre amp serviced and they are in perfect working order even with the first set of srs2 i had i had the same problem the trouble i have is a loud pop from the speakers at higher volumes (not extreme) so much that it will blow the mid woofers normally the top inside of the right channel i'm not sure what generation these are and have no owners manual to go by thanks for your input so far guys
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  • jimitbone
    jimitbone Posts: 17
    edited April 2007
    the drivers themselves are model # 6509 made in 1986 so what do you think compadible with the carver equipment i mentioned earlier
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  • Auraka
    Auraka Posts: 18
    edited April 2007
    My guess is you are overdriving the mid-bass drivers, either with the loudness switch set to 'on' when it shouldn't be, and/or through too much attenuation with the bass tone control at high volume levels. SDA's are robust but have their limits.

    Sounds like your speakers are 3rd gen blade/blade. I'm not sure if the crossovers in those were the older, more demanding kind (revamped in the 4th gen). Why I say that is the pics I have of 3rd gen SDA SRS2 show the tweeters stacked vertically, which means they should be out of the SDA circuit.

    The failures I experienced were from flat out over driving the speakers with 1000W mono (pair of 4.0t's), which actually fractured the cones. One 4.0t shouldn't be able to do that without help (loudness/bass attenuation).
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  • jimitbone
    jimitbone Posts: 17
    edited April 2007
    the tweeters are stacked vertically what toyou mean by blade\blade i've seen that term several times now
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  • Auraka
    Auraka Posts: 18
    edited April 2007
    jimitbone wrote: »
    the tweeters are stacked vertically what to you mean by blade\blade I've seen that term several times now
    Blade/blade or pin/blade refers to the style of interconnect termination.

    Blade/blade was used on an earlier (and more demanding) style crossover. Pin/blade was used on later, more amp friendly, AI-1 capable crossovers. Most 4th gen should be pin/blade IIRC.

    I'm thinking Polk had a crossover with the tweeters in SDA, then a transition blade/blade style w/o the tweeters in SDA (though not compatible with AI-1 interconnect), then the more amp friendly pin/blade version in my SDA1C's (AI-1 compatible).
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