RTI A5 replace 6-1/2 "composite woofer

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johy
johy Posts: 17
in Troubleshooting
Hi guys,

I have this pair of RTI A5s purchased around 10 years go. The four 6-1/2 Dynamic Balance polymer composite woofers in both the speakers have started cracking. Where can I purchase a replacement for the same? I think I should be able to fix the new ones myself.
Thanks in advance.
Onkyo 727| Polk RTi A5 biamped| Polk RTi4s surrounds| Polk CSi3 center| subwoofer PSW404 :)
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  • rooftop59
    rooftop59 Posts: 8,120
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    Yea that sounds strange. Polk is your main source, but there may be other suppliers that have stock from Polk...
    Living Room 2.2: Usher BE-718 "tiny dancers"; Dual DIY Dayton audio RSS210HF-4 Subs with Dayton SPA-250 amps; Arcam SA30; Musical Fidelity A308; Sony UBP-x1000es
    Game Room 5.1.4:     Denon AVR-X4200w; Sony UBP-x700; Definitive Technology Power Monitor 900 mains, CLR-3000 center, StudioMonitor 350 surrounds, ProMonitor 800 atmos x4; Sub - Monoprice Monolith 15in THX Ultra
    Bedroom 2.1     Harmon Kardon HK3490; Bluesounds Node N130; Polk RT25i; ACI Titan Subwoofer
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  • johy
    johy Posts: 17
    edited June 2019
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    Thanks, The cones are actually cracking up. I can see around 4 cracks in each of the cones. Will post pics later.

    Sorry I mean to type cones..it is a ruptured cone problem, not the diaphragm. How can I repair them ? Parts ?
    Onkyo 727| Polk RTi A5 biamped| Polk RTi4s surrounds| Polk CSi3 center| subwoofer PSW404 :)
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  • tonyb
    tonyb Posts: 33,077
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    Cracking ? don't think I ever seen that happen before. Can you post a pic of the worst one ?
    HT SYSTEM-
    Sony 850c 4k
    Pioneer elite vhx 21
    Sony 4k BRP
    SVS SB-2000
    Polk Sig. 20's
    Polk FX500 surrounds

    Cables-
    Acoustic zen Satori speaker cables
    Acoustic zen Matrix 2 IC's
    Wireworld eclipse 7 ic's
    Audio metallurgy ga-o digital cable

    Kitchen

    Sonos zp90
    Grant Fidelity tube dac
    B&k 1420
    lsi 9's
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  • F1nut
    F1nut Posts: 52,406
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    Says severely overdriven to me.
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  • tonyb
    tonyb Posts: 33,077
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    F1nut wrote: »
    Says severely overdriven to me.

    That's what I was thinking, but even then....don't think I ever seen a cone crack as described. All of them yet ? I've seen 50 year old speakers with no cracked woofers, ripped maybe because they were paper back then. Todays more stiffer drivers should not crack I would think. Plus to over drive a speaker that badly, you'd think a crossover might go up in smoke first.

    Pictures tell a thousand words though.
    HT SYSTEM-
    Sony 850c 4k
    Pioneer elite vhx 21
    Sony 4k BRP
    SVS SB-2000
    Polk Sig. 20's
    Polk FX500 surrounds

    Cables-
    Acoustic zen Satori speaker cables
    Acoustic zen Matrix 2 IC's
    Wireworld eclipse 7 ic's
    Audio metallurgy ga-o digital cable

    Kitchen

    Sonos zp90
    Grant Fidelity tube dac
    B&k 1420
    lsi 9's
    · Share on Facebook
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  • tonyb
    tonyb Posts: 33,077
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    Possible Ivan, but RTIA5's that are only 10 years old ?
    HT SYSTEM-
    Sony 850c 4k
    Pioneer elite vhx 21
    Sony 4k BRP
    SVS SB-2000
    Polk Sig. 20's
    Polk FX500 surrounds

    Cables-
    Acoustic zen Satori speaker cables
    Acoustic zen Matrix 2 IC's
    Wireworld eclipse 7 ic's
    Audio metallurgy ga-o digital cable

    Kitchen

    Sonos zp90
    Grant Fidelity tube dac
    B&k 1420
    lsi 9's
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  • VR3
    VR3 Posts: 29,752
    edited June 2019
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    The cones are a simple polymer, should last.... "a life time"
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • johy
    johy Posts: 17
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    Here is the pic of the worst one. I have never over driven them. My earlier AV receiver , an Onkyo 727 , did burn up, and I wonder if it caused this. I am back to my earlier Denon now, which I have used for a long time.ovw4s0ifxxoe.jpg
    Onkyo 727| Polk RTi A5 biamped| Polk RTi4s surrounds| Polk CSi3 center| subwoofer PSW404 :)
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  • VR3
    VR3 Posts: 29,752
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    There is something off about the color of the screws, have you had them in sunlight or near a window

    Looks like just the dust cap is damaged which wouldn't be hard to fix
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • F1nut
    F1nut Posts: 52,406
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    That's the dust cover and looks to me like the result of overheated voice coils.
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  • johy
    johy Posts: 17
    edited June 2019
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    Thanks guys. Sorry I am not so tech savvy with the names. It is the dust cover then. Can I just buy the dust cover from somewhere, open the speakers and reattach them? The speakers are in a room upstairs. It can get very hot there. There are no windows..just a big door. Air conditioned dedicated home theatre.

    Where can I buy them? And what size,.they seem like 2" when I measured them across.
    Onkyo 727| Polk RTi A5 biamped| Polk RTi4s surrounds| Polk CSi3 center| subwoofer PSW404 :)
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  • F1nut
    F1nut Posts: 52,406
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    Google replacement speaker dust caps or you can have them replaced here, https://www.midwestspeakerrepair.com/speaker-repair-prices/
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  • VR3
    VR3 Posts: 29,752
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    How hot is very hot? Really indoor speakers shouldnt experience drastic temperature swings. I have seen cabinets split apart, veneer peel, driver damages, etc...
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • johy
    johy Posts: 17
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    When the door is closed, in peak summer , it would be 100-110 F. Grills are removed yes, and I could sun the grills
    Onkyo 727| Polk RTi A5 biamped| Polk RTi4s surrounds| Polk CSi3 center| subwoofer PSW404 :)
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  • F1nut
    F1nut Posts: 52,406
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    Way too hot.
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  • rooftop59
    rooftop59 Posts: 8,120
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    Million dollar question, do they sound any different? If not, just leave em....
    Living Room 2.2: Usher BE-718 "tiny dancers"; Dual DIY Dayton audio RSS210HF-4 Subs with Dayton SPA-250 amps; Arcam SA30; Musical Fidelity A308; Sony UBP-x1000es
    Game Room 5.1.4:     Denon AVR-X4200w; Sony UBP-x700; Definitive Technology Power Monitor 900 mains, CLR-3000 center, StudioMonitor 350 surrounds, ProMonitor 800 atmos x4; Sub - Monoprice Monolith 15in THX Ultra
    Bedroom 2.1     Harmon Kardon HK3490; Bluesounds Node N130; Polk RT25i; ACI Titan Subwoofer
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  • johy
    johy Posts: 17
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    They sound the same. Think I might as well leave them.
    Onkyo 727| Polk RTi A5 biamped| Polk RTi4s surrounds| Polk CSi3 center| subwoofer PSW404 :)
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  • tonyp063
    tonyp063 Posts: 1,157
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    He did say that the room had no windows, just a door & was an A/C cooled dedicated HT room.

    Could it be severe lack of humidity? Or drastic temp swings?
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  • F1nut
    F1nut Posts: 52,406
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    Needs to leave the A/C on.
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