A tad aggressive with the volume knob...

Ron Temple
Ron Temple Posts: 3,212
edited May 2010 in Vintage Speakers
...on my 1Cs last night. Had the pre close to noon and heard one of my 6511s making a farting noise (the lower driver handling more bass). Examined it and it seemed to be pushing more air than the other speakers. I recently Mortited these speakers so I know the seal is good. Backed off the volume and everything came correct, but I'm wondering if this MW is starting to go. Doesn't look to have a tear in the surround. Any thoughts?

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
Post edited by Ron Temple on
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Comments

  • Face
    Face Posts: 14,340
    edited May 2010
    Maybe it's time to recap your amps?
    "He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche
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  • Ron Temple
    Ron Temple Posts: 3,212
    edited May 2010
    That's on the to do list, but why just one of the drivers?

    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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  • Schurkey
    Schurkey Posts: 2,104
    edited May 2010
    Farting noise and reduced bass from one driver sure would make me suspect an air leak (or perhaps some other mechanical problem) at that driver.

    The 6511s are wired in series, an electrical fault with one should affect the other the same way.
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  • headrott
    headrott Posts: 5,496
    edited May 2010
    Ron, is it an original or newer 6511?

    Greg
    Relayer-Big-O-Poster.jpg
    Taken from a recent Audioholics reply regarding "Club Polk" and Polk speakers:
    "I'm yet to hear a Polk speaker that merits more than a sentence and 60 seconds discussion." :\
    My response is: If you need 60 seconds to respond in one sentence, you probably should't be evaluating Polk speakers.....

    "Green leaves reveal the heart spoken Khatru"- Jon Anderson

    "Have A Little Faith! And Everything You'll Face, Will Jump From Out Right On Into Place! Yeah! Take A Little Time! And Everything You'll Find, Will Move From Gloom Right On Into Shine!"- Arthur Lee
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  • Ron Temple
    Ron Temple Posts: 3,212
    edited May 2010
    Schurkey wrote: »
    Farting noise and reduced bass from one driver sure would make me suspect an air leak (or perhaps some other mechanical problem) at that driver.

    The 6511s are wired in series, an electrical fault with one should affect the other the same way.
    I guess I'll pop the driver and check the seal and connection. There was definitely more air being pushed and that could be a leak.

    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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  • Ron Temple
    Ron Temple Posts: 3,212
    edited May 2010
    headrott wrote: »
    Ron, is it an original or newer 6511?

    Greg
    It's an original...might be a replacement I picked up from Polk65. I did have one go bad a few years ago.

    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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  • headrott
    headrott Posts: 5,496
    edited May 2010
    Ron Temple wrote: »
    It's an original...might be a replacement I picked up from Polk65. I did have one go bad a few years ago.

    Hmm, not sure then. I had a newer 6511 I got from Polk that would get overloaded easily when you pushed it with somewhat high dB levels. If it's an original it may be time to replace it. Does it still move freely without any rubbing at all?

    Greg
    Relayer-Big-O-Poster.jpg
    Taken from a recent Audioholics reply regarding "Club Polk" and Polk speakers:
    "I'm yet to hear a Polk speaker that merits more than a sentence and 60 seconds discussion." :\
    My response is: If you need 60 seconds to respond in one sentence, you probably should't be evaluating Polk speakers.....

    "Green leaves reveal the heart spoken Khatru"- Jon Anderson

    "Have A Little Faith! And Everything You'll Face, Will Jump From Out Right On Into Place! Yeah! Take A Little Time! And Everything You'll Find, Will Move From Gloom Right On Into Shine!"- Arthur Lee
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  • Ron Temple
    Ron Temple Posts: 3,212
    edited May 2010
    headrott wrote: »
    Hmm, not sure then. I had a newer 6511 I got from Polk that would get overloaded easily when you pushed it with somewhat high dB levels. If it's an original it may be time to replace it. Does it still move freely without any rubbing at all?

    Greg
    I just popped it and can see nothing wrong. I must have been pushing it pretty hard last night. I'm at 9AM on the dial right now and am measuring 90dbs at 3M...no issue and it sounds pretty loud to me (now). I was probably in the 105db plus range...sounded good :D, until the farting. I think I had the single malt itch going a bit too much. Wife's out of town visiting some of our kids in San Diego.

    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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  • thsmith
    thsmith Posts: 6,082
    edited May 2010
    Go Ron ! Just be careful;)
    Speakers: SDA-1C (most all the goodies)
    Preamp: Joule Electra LA-150 MKII SE
    Amp: Wright WPA 50-50 EAT KT88s
    Analog: Marantz TT-15S1 MBS Glider SL| Wright WPP100C Amperex BB 6er5 and 7316 & WPM-100 SUT
    Digital: Mac mini 2.3GHz dual-core i5 8g RAM 1.5 TB HDD Music Server Amarra (memory play) - USB - W4S DAC 2
    Cables: Mits S3 IC and Spk cables| PS Audio PCs
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  • Ron Temple
    Ron Temple Posts: 3,212
    edited May 2010
    thsmith wrote: »
    Go Ron ! Just be careful;)
    No DUI possible here...having a home office makes my commute negligible :p. Oh, you mean back off the MV :eek:.

    Before I broke out the Luxman 2 channel pre, I was listening to Porcupine Trees new DVD in MCH at reference level, so naturally I was used to LOUD when I changed over.

    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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  • thsmith
    thsmith Posts: 6,082
    edited May 2010
    I love my wife but when she takes a trip to visit her family and I have the house to myself I have no problems having a good time.

    A few drinks and find myself pushing a little hard too.

    Hvae a good time and enjoy.

    Good to see you posting.
    Speakers: SDA-1C (most all the goodies)
    Preamp: Joule Electra LA-150 MKII SE
    Amp: Wright WPA 50-50 EAT KT88s
    Analog: Marantz TT-15S1 MBS Glider SL| Wright WPP100C Amperex BB 6er5 and 7316 & WPM-100 SUT
    Digital: Mac mini 2.3GHz dual-core i5 8g RAM 1.5 TB HDD Music Server Amarra (memory play) - USB - W4S DAC 2
    Cables: Mits S3 IC and Spk cables| PS Audio PCs
    · Share on FacebookShare on Twitter
  • Ron Temple
    Ron Temple Posts: 3,212
    edited May 2010
    thsmith wrote: »
    I love my wife but when she takes a trip to visit her family and I have the house to myself I have no problems having a good time.

    A few drinks and find myself pushing a little hard too.

    Hvae a good time and enjoy.

    Good to see you posting.
    I've been around, just not posting much. I've been very busy and it's been important stuff, so I don't chime in unless my interest is really peaked...or I have a problem ;).

    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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  • Toolfan66
    Toolfan66 Posts: 17,337
    edited May 2010
    I pushed mine too almost noon today, and it was freaking loud,and I very seldom do that anymore but once in awhile its fun..

    Glad to hear everythings OK..
    Polk Audio SDA 2.3tl Fully Hot Rodded. 😎

    SVS SB16 X2

    Cary SLP-05/Ultimate Upgrade.
    Cary SA-500.1 ES Amps
    Cary DMS 800PV Network
    OPPO UDP 205/ModWright Modification
    VPI Scout TT / Dynavector 20x2
    Jolida JD9 Fully Modified

    VPI MW-1 Cyclone RCM

    MIT Shotgun 3 cables throughout / Except TT, and PC’s
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  • dorokusai
    dorokusai Posts: 25,577
    edited May 2010
    It will eventually fail. I've seen this many times.
    CTC BBQ Amplifier, Sonic Frontiers Line3 Pre-Amplifier and Wadia 581 SACD player. Speakers? Always changing but for now, Mission Argonauts I picked up for $50 bucks, mint.
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  • F1nut
    F1nut Posts: 50,755
    edited May 2010
    dorokusai wrote: »
    It will eventually fail. I've seen this many times.

    Agreed. That driver is on its way out.
    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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  • Ron Temple
    Ron Temple Posts: 3,212
    edited May 2010
    dorokusai wrote: »
    It will eventually fail. I've seen this many times.
    F1nut wrote:
    Agreed. That driver is on its way out.

    That's what I was thinking. Thanks for the confirmation.

    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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  • TNRabbit
    TNRabbit Posts: 2,168
    edited May 2010
    If by pushing more air, you mean it's moving in & out more than the others at a given volume, then my guess is you've melted a portion of the voice coil. This makes the overall impedance of that speaker lower & requires more current from your amp. I would check the impedance of that individual driver against the others for any variation.
    TNRabbit
    NO Polk Audio Equipment :eek:
    Sunfire TG-IV
    Ashly 1001 Active Crossover
    Rane PEQ-15 Parametric Equalizers x 2
    Sunfire Cinema Grand Signature Seven
    Carver AL-III Speakers
    Klipsch RT-12d Subwoofer
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