Polk SDA 1C

Drevlin
Drevlin Posts: 23
edited March 2010 in Vintage Speakers
So I have an interesting problem that is beyond me. I have a Carver Ct6 pre amp and a Carver TFM 35x amp. My issue is this: when they are wired correctly (yes I have double checked this) the left speaker is quieter than the right for the tweeters. I first thought it was my tweeters acting up as seen in a much older post here of mine. First I tried switching left and right wiring, this fixed the problem, they sounded to be the same level. So I figured i had a bad wire, switched the wires back and the issue was back. Then I switched pre amp to amp connections, issue fixed again. Does anyone have an idea what the issue may be?
System:
HK680i
HK AVR 254
Carver TFM-35x
Carver CT 6
Samsung 37" 720p
AAL Speakers (modified, unknown Model)
Polk SDA 1C (Upgraded X-overs)
Polk Monitor 7
Roland DM-20 monitors
Post edited by Drevlin on
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Comments

  • george daniel
    george daniel Posts: 12,096
    edited March 2010
    Hmmm,, do you have polyswitches? I guess what I'm getting at is,, does this occur during/after loud passages?
    JC approves....he told me so. (F-1 nut)
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  • HB27
    HB27 Posts: 1,518
    edited March 2010
    I had an AQ Sidewinder go bad from switching out so much gear that when I moved the cables lightly they would make contact enough to bring up the speaker levels. Just guessing here.
    George also makes an excellent point about the Polyswitches going bad and tripping out again.
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  • george daniel
    george daniel Posts: 12,096
    edited March 2010
    +1 on what he said about cables,, just happened to me,,and initially I thought it was the pre--good point sir-- how have you been?
    JC approves....he told me so. (F-1 nut)
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  • HB27
    HB27 Posts: 1,518
    edited March 2010
    Email sent
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  • Toolfan66
    Toolfan66 Posts: 17,334
    edited March 2010
    HB27 wrote: »
    I had an AQ Sidewinder go bad from switching out so much gear that when I moved the cables lightly they would make contact enough to bring up the speaker levels. Just guessing here.
    George also makes an excellent point about the Polyswitches going bad and tripping out again.

    This happened to me just last week... with a set of AQ DB's
    Polk Audio SDA 2.3tl Fully Hot Rodded. 😎

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  • Drevlin
    Drevlin Posts: 23
    edited March 2010
    Actually George Daniel if memory serves, these are your SDA's from ebay, say 2 years ago. I also believe there are no polyswitches. this occurs at any volume I will fiddle with the wiring and check back.
    System:
    HK680i
    HK AVR 254
    Carver TFM-35x
    Carver CT 6
    Samsung 37" 720p
    AAL Speakers (modified, unknown Model)
    Polk SDA 1C (Upgraded X-overs)
    Polk Monitor 7
    Roland DM-20 monitors
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  • HB27
    HB27 Posts: 1,518
    edited March 2010
    TOOLFORLIFEFAN wrote: »
    This happened to me just last week... with a set of AQ DB's

    I contacted AQ cust svc and they told me to send them back with copy of my receipt and they'd send me out a new pair. Great service from AQ btw.
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  • george daniel
    george daniel Posts: 12,096
    edited March 2010
    Drevlin wrote: »
    Actually George Daniel if memory serves, these are your SDA's from ebay, say 2 years ago. I also believe there are no polyswitches. this occurs at any volume I will fiddle with the wiring and check back.

    Hmmm, are they studios or oak/walnut?
    JC approves....he told me so. (F-1 nut)
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  • Drevlin
    Drevlin Posts: 23
    edited March 2010
    They were oak/walnut but I did have to replace the tops and bottoms (I think they look better now though went much darker)
    System:
    HK680i
    HK AVR 254
    Carver TFM-35x
    Carver CT 6
    Samsung 37" 720p
    AAL Speakers (modified, unknown Model)
    Polk SDA 1C (Upgraded X-overs)
    Polk Monitor 7
    Roland DM-20 monitors
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  • george daniel
    george daniel Posts: 12,096
    edited March 2010
    I'm trying to remember them,, IIRC these were damaged in shipping to you? One of the crossovers (left speaker) was dislodged,indicating that it took a pretty good hit? Just trying to help you--but,, have these always had this issue,or is this new? You might to change interconnects,,but if you have ruled them out,then I would pull the passives and verify the wiring.Please keep me/us posted--these are some sweet speakers.
    JC approves....he told me so. (F-1 nut)
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  • inspiredsports
    inspiredsports Posts: 5,501
    edited March 2010
    I'm also wondering if the problem has always been there, of has it just developed? Is there evidence that a tweeter has been replaced?
    VTL ST50 w/mods / RCA6L6GC / TlfnknECC801S
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    Walnut SDA 2B TL /Oak SDA SRS II TL (Sonicaps/Mills/Cardas/Custom SDA ICs / Dynamat Extreme / Larry's Rings/ FSB-2 Spikes
    NAD SS rigs w/mods
    GIK panels
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  • Drevlin
    Drevlin Posts: 23
    edited March 2010
    The issue with the tweeters has always been an odd crackle. Usually cutting out at low volumes but better at higher volumes. The crossover was found when they arrived up by the tweeters. Ups threw them out of the truck. Sad. This is a very new development and quite discouraging I'll take the passive off again if I must but the wood is getting worn out there.
    System:
    HK680i
    HK AVR 254
    Carver TFM-35x
    Carver CT 6
    Samsung 37" 720p
    AAL Speakers (modified, unknown Model)
    Polk SDA 1C (Upgraded X-overs)
    Polk Monitor 7
    Roland DM-20 monitors
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  • george daniel
    george daniel Posts: 12,096
    edited March 2010
    if you can,, send me the crossover and I'll take a look at it,and put in my 1c's--we'll get her fixed.
    JC approves....he told me so. (F-1 nut)
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  • Conradicles
    Conradicles Posts: 6,134
    edited March 2010
    george daniel wrote: »
    if you can,, send me the crossover and I'll take a look at it,and put in my 1c's--we'll get her fixed.

    You are THE man George. Top notch customer sevice from a forum member!:cool:
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  • Drevlin
    Drevlin Posts: 23
    edited March 2010
    That is truly a great offer and i really appreciate it. I got back from chicago about an hour ago. 1st I decided to swap tweeters, so I take all 4 off and switch them. I then powered up, and played Elton John "I am your robot" and Dire Straights, Money for nothing. I was amazed, the sound was good out of both neither was quieter than the other. the other amazing thing was that my crackling issue was completely gone! i will play them tomorrow louder and on more tracks but so far this is the best they have sounded in almost my 3 years of ownership. I wish I had done this earlier

    Also George, I don't know if they originally came with polyfill in the cabinets but the left cabinet has the fill up by the tweeters and the right has it behind the 4 woofers, where should it actually be? Thanks
    System:
    HK680i
    HK AVR 254
    Carver TFM-35x
    Carver CT 6
    Samsung 37" 720p
    AAL Speakers (modified, unknown Model)
    Polk SDA 1C (Upgraded X-overs)
    Polk Monitor 7
    Roland DM-20 monitors
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  • Drevlin
    Drevlin Posts: 23
    edited March 2010
    Sorry for the double post

    I played more a louder music today, sadly it still has issues, not volume just my strange crackling and cutting out issue so it must be the x-over. I'll probably take you up on your offer at the end of the week and hopefully thats the issue.
    System:
    HK680i
    HK AVR 254
    Carver TFM-35x
    Carver CT 6
    Samsung 37" 720p
    AAL Speakers (modified, unknown Model)
    Polk SDA 1C (Upgraded X-overs)
    Polk Monitor 7
    Roland DM-20 monitors
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