My left sda-2 sounds blown

Vinyl_is_Primal
Vinyl_is_Primal Posts: 28
in Vintage Speakers
My left sda-2 makes a farting type rumble or pop vibration when the bass hits during high volume (not even close to max). It sounds terrible and I don't know one of the speakers is blown or why it makes that uncomfortable sound.

It's only the left speaker

can I replace the woofer or drivers? Is that the problem?
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Comments

  • F1nut
    F1nut Posts: 50,552
    Need more info. What are you driving them with and what is not even close to max? How long have you owned them? Remove the grill, put your ear up to each driver and the PR (it's not a woofer) to determine which is the problem. Report back.
    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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  • halo71
    halo71 Posts: 4,603
    edited January 2015
    Have you checked that all the screws are tight on the drivers and passive? Have you gently pushed on each midwoofer to make sure there is no scratchy feeling or sound?
    --Gary--
    Onkyo Integra M504, Bottlehead Foreplay III, Denon SACD, Thiel CS2.3, NHT VT-2, VT-3 and Evolution T6, Infinity RSIIIa, SDA1C and a few dozen other speakers around the house I change in and out.
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  • Vinyl_is_Primal
    Vinyl_is_Primal Posts: 28
    I've used all sorts of receivers to drive them. The its like all the speakers in the left tower are maxxed out but the right can handle more.
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  • F1nut
    F1nut Posts: 50,552
    You are not helping us to help you.
    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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  • boston1450
    boston1450 Posts: 7,639
    F1nut wrote: »
    Need more info. What are you driving them with and what is not even close to max? How long have you owned them? Remove the grill, put your ear up to each driver and the PR (it's not a woofer) to determine which is the problem. Report back.
    :::::: This Again::::::
    ..
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  • Vinyl_is_Primal
    Vinyl_is_Primal Posts: 28
    jvc r-s77 4/10 on volume
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  • Vinyl_is_Primal
    Vinyl_is_Primal Posts: 28
    It only happens at high volume so I'd rather not have my ear next to it.
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  • Vinyl_is_Primal
    Vinyl_is_Primal Posts: 28
    realistic sta-2280 _-around the same volume output
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  • Vinyl_is_Primal
    Vinyl_is_Primal Posts: 28
    Kenwood kr-77- around 4.8/10 on the volume

    Sony STR-6036 ^ around the same volume as above
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  • Vinyl_is_Primal
    Vinyl_is_Primal Posts: 28
    I've owned them for about 7 months. always this way.
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  • nooshinjohn
    nooshinjohn Posts: 25,416
    Sounds like you are over-driving the receivers. SDA can present a tough load for low powered gear like that Kenwood. None of those receivers actually, appear to be well suited for driving these speakers IMHO.
    The Gear... Carver "Statement" Mono-blocks, Mcintosh C2300 Arcam AVR20, Oppo UDP-203 4K Blu-ray player, Sony XBR70x850B 4k, Polk Audio Legend L800 with height modules, L400 Center Channel Polk audio AB800 "in-wall" surrounds. Marantz MM7025 stereo amp. Simaudio Moon 680d DSD

    “When once a Republic is corrupted, there is no possibility of remedying any of the growing evils but by removing the corruption and restoring its lost principles; every other correction is either useless or a new evil.”— Thomas Jefferson
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  • boston1450
    boston1450 Posts: 7,639
    edited January 2015
    Vinyl_is_Primal wrote: »
    jvc r-s77 4/10 on volume
    if this is the receiver @ high volumes that may be the issue. Clipping out on ya. http://www.hifiengine.com/manual_library/jvc/r-s77.shtml
    ..
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  • boston1450
    boston1450 Posts: 7,639
    Vinyl_is_Primal wrote: »
    I've owned them for about 7 months. always this way.
    Get yourself a decent amp & preamp around 200wpc or more. More quality power for those wonderful speakers of yours....Think of it this way. You can haul a camper trailer with a half ton v8 truck--right--you hook up to a Ranger v6. Will it do it ? Maybe & its gonna be hard on the v6. Would the v8 do it easier & more efficient? I think so
    ..
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  • halo71
    halo71 Posts: 4,603
    Guys, yeah he needs more power no doubt. But if they have been doing that since he bought them. I am thinking the receivers are not the problem here. Unless he clipped the SDA's from the get go. So there are greater issue(s) at hand to deal with.

    I'm gonna say a bad/scratchy midwoofer(s).
    --Gary--
    Onkyo Integra M504, Bottlehead Foreplay III, Denon SACD, Thiel CS2.3, NHT VT-2, VT-3 and Evolution T6, Infinity RSIIIa, SDA1C and a few dozen other speakers around the house I change in and out.
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  • boston1450
    boston1450 Posts: 7,639
    edited January 2015
    ^^^^ agree.. I see what your saying. Left speaker. Might be a reason Jesse said more info.. He stated at high volumes with only 60wpc & SDA's ?
    ..
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  • F1nut
    F1nut Posts: 50,552
    Ok, not only low powered consumer grade receivers, but those speakers are 4 ohm nominal and dip lower. Without checking I'd say none of those receivers are rated to drive a 4 ohm loads. I also have to say 7 months is a long time to live with a busted speaker.

    Since you, the OP, are not willing to get your ears close to the speaker, do you think you could manage to swap one driver at a time with the right speaker in an effort to determine which is the problem?
    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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  • Vinyl_is_Primal
    Vinyl_is_Primal Posts: 28
    Ok. Clearly I'm out of my league when it comes to powering these puppies.

    The best amp I have, as far as power goes, is a Pioneer SA-1050 which is 100xwpc

    It's definitely the speakers and not the amp cause it's strictly the left.

    Swapping out the midwoofers is a genius idea.

    I'll try that Sunday.

    If it's that can they be replaced?
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  • Vinyl_is_Primal
    Vinyl_is_Primal Posts: 28
    Clipping out? The receiver has never stopped if that's what clipping out is.

    I know the Sony is 4 ohms

    Not sure about the rest.

    But I'm sure they are not powerful enough to really drive these to the highest potential.

    I'm an absolute novice that collects from second hand stores, flea markets and yard sales.

    Maybe I'll find a nice giant Sansui or Marantz one day for a good price or even a McIntosh...
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  • F1nut
    F1nut Posts: 50,552
    That Sony is the second worst of the bunch. The Pioneer integrated is the best and I'm pretty sure is 4 ohm rated.
    If it's that can they be replaced?

    Yes.
    Clipping out? The receiver has never stopped if that's what clipping out is.

    No, clipping happens when the power supply runs out of gas resulting in a clipped signal being sent to the speakers. The sound becomes shrill and compressed. Clipping usually takes out the tweeter(s) first, but not always. General rule of thumb, never go beyond halfway on the volume control, but that will depend on a number of factors. You could easily be in the clipping range with the power gear and speakers you are using.

    Forget the vintage consumer grade receivers, sell all that stuff and get a real piece of audio gear. There are plenty of excellent integrated amps available. You need something with a high current rating.




    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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  • westmassguy
    westmassguy Posts: 6,850
    In addition to what's already been said, you should check the individual woofers for binding or odd noises. Gently press in on the cones. They should move freely, with no rubbing, binding or grating noise. Also, do a air leakage test on the speaker. Press in and hold the Passive Radiator. The woofers should pop out, and stay out for a few seconds, then slowly return to their original position. If they move back immediately, you've got air leaks. Check all the rubber surrounds on the Woofers and the Passive Radiator for cracks, splits or holes.
    Home Theater/2 Channel:
    Front: SDA-2ATL forum.polkaudio.com/discussion/143984/my-2as-finally-finished-almost/p1
    Center: Custom Built forum.polkaudio.com/discussion/150760/my-center-channel-project/p1
    Surrounds & Rears: Custom Built forum.polkaudio.com/discussion/151647/my-surround-project/p1
    Sonicaps, Mills, RDO-194s-198s, Dynamat, Hurricane Nuts, Blackhole5
    Pioneer Elite VSX-72TXV, Carver PM-600, SVS PB2-Plus Subwoofer

    dhsspeakerservice.com/
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  • fenwayjimi
    fenwayjimi Posts: 1
    This is an interesting thread I had this same issue with a pair of sda srs2's I was driving them with a Carve m4.0t at 375 into 8 ohm 550 into 4 never did figure out why the left speaker farted like that. Can tell you this once they **** that driver is done. I replaced the drivers with silver flutes recomended to me by Helen due to the 6510's being unavailable at rhe time and the problem was cured. A friend of mine had the same setup same issue he sold his pair off.
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  • nooshinjohn
    nooshinjohn Posts: 25,416
    silver flutes?
    The Gear... Carver "Statement" Mono-blocks, Mcintosh C2300 Arcam AVR20, Oppo UDP-203 4K Blu-ray player, Sony XBR70x850B 4k, Polk Audio Legend L800 with height modules, L400 Center Channel Polk audio AB800 "in-wall" surrounds. Marantz MM7025 stereo amp. Simaudio Moon 680d DSD

    “When once a Republic is corrupted, there is no possibility of remedying any of the growing evils but by removing the corruption and restoring its lost principles; every other correction is either useless or a new evil.”— Thomas Jefferson
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