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  1. #1

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    Default Polk RTi A5 Tweeter Cutting In and Out

    Hi,
    The tweeter on my right RTi A5 connected to my HTPC via HDMI powered by a Yamaha RX-V767 rarely cuts out and I can't hear it.
    During music listening or while playing videogames on the HTPC. I adjusted the volume a bit and it kicked right back in! This has happened about thrice now in the last month. I did, by the way, notice that one of the HDMI cables was a bit loose. I removed it and plugged it back in after cleaning the contacts but I hardly think that it's the HDMI's fault because I've heard if the connection is lose there will be no picture and no sound.
    Also at first I thought that the tweeter was blown but according to some posts here if it were blown than it would make no sound at all. Also on one post I read that it might have something to do with the crossover. Is there something wrong with my receiver? Are the wire contacts oxidized(is that even a thing)?

    Any idea whats wrong here? It's perfectly fine right now and sounds awesome.
    Thanks in advance to everyone.

    On a side not when I try to access the Polk Forums I get a message that the Administrator has banned your IP address. Contact webmaster here. I did contact him and the problem went away for 2 days but now again I'm getting this message and now I can only access the forums via a proxy server.
    Although I did not get a reply from him on my email address that I gave.

  2. #2
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    Hello,
    If you look at the rear of the speaker's cabinet you will see two sets of speaker binding posts. Make sure the gold plated jumper plate is firmly in place. If the binding post caps seem tight, try unloosening all four binding post caps and use a good quality electrical contact cleaner (found at most electronic parts supply stores) to thoroughly clean all of the contact areas on the binding post shaft and the jumper plates.
    Regards, Ken

  3. #3

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    Check the speaker cable connections on the back of your AVR as well.
    '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 turd by the clean end."

  4. #4

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    Hi,
    Thanks for the replies guys,
    The gold plated jumper plate is firmly in place. I removed it and reconnected it and checked it's integrity. I believe it's fine.
    Although the gold plated jumper plate was slightly stained, I wonder what that is and how do I clean with contact cleaner? Dip a cloth in contact cleaner and rub it on the jumper plates?

    F1nut,
    I checked the speaker cable connections on the back of my AVR. Removed all the wires and put them back in. I think they're alright

  5. #5
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    Hello,
    Usually electrical contact cleaner comes as an aerosol spray. You can either spray directly onto the jumper plate or spray onto a clean cloth and then wipe the plates.
    Cheers, Ken

  6. #6

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    Okay thanks Ken and also F1nut.
    Will do this and will report back if the problem persists.

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    Another solution would be to replace the jumper plates with short pieces of quality speaker wire and lose the plates entirely, just another suggestion.
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  8. #8

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    Quote Originally Posted by nbrowser View Post
    Another solution would be to replace the jumper plates with short pieces of quality speaker wire and lose the plates entirely, just another suggestion.
    What would constitute as quality speaker wire? Sorry I'm a newb at this... Is Monster XP wire okay? I'm using it currently got it free with the speakers.

  9. #9

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    At this point I suspect you have a cold (bad) solder joint on the crossover board or a loose connection at the tweeter.

    What would constitute as quality speaker wire?
    That will vary with experience, wallet and level of gear. That said, just about any speaker wire is better than those plated brass jumpers, but I don't think the jumpers are the cause of the issue you're having right now.
    'Political Correctness'.........defined

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    In that case I would have to open the tweeter assembly and check the loose connection or resolder something?
    BTW I've never used a soldering gun nor do I own one.

  11. #11

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    There will be 2 wires connected to the tweeter coming from the crossover board. The connection is made with Faston (push on) terminals. Remove the tweeter assembly, pull the connections off and push back on again. Do not attempt to open the tweeter itself.
    '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 turd by the clean end."

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    Sorry if I'm being thick but should I wait untill and if the problem recurs?

  13. #13

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    Up to you.
    'Political Correctness'.........defined

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  14. #14

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    I'll wait then, thanks F1nut for all the help so far.

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    Quote Originally Posted by ThirdWorldGuy View Post
    What would constitute as quality speaker wire? Sorry I'm a newb at this... Is Monster XP wire okay? I'm using it currently got it free with the speakers.
    Any quality 12 gauge OFC copper speaker wire is better than those plates, I had mine off my RTiA7s long before they were hooked up to my receiver. Then again I've wired them a little differently than you. But premium speaker wire...possible 4-5 inches long, 1 peice each in place of the plates is quite a bit better than the plates themselves.
    Living Room Evolved
    Onkyo TX-NR717
    Parasound HCA-1200II
    Polk Audio RTi A7 Black Front
    Polk Audio RTi A3 Black Rear
    Polk Audio CSiA6 Center
    Transparent Audio Music Wave Biwire cables > Mains
    Canare 4S11 >Center
    Audioquest Evergreens on most of the analog connections
    Tannoy TS2.12 Sub
    Marantz CD6004
    Pro-Ject Debut Carbon Piano Black TT
    Parasound Zphono Phono Preamp
    Apple Mac Mini
    Apple TV 3rd Gen
    Sony PS3 160Gb/Microsoft XBox 360
    Insignia 55 inch 120Hz TV

  16. #16

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    Is 16 gauge alright? Or do I have to be sure to use 12 gauge or greater?

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