RT1000p subwoofer hum issues

Dshib1000
Dshib1000 Posts: 3
edited July 2011 in Troubleshooting
Hey folks, long time Polk speaker owner with a problem that others have asked about and seem to have gotten repaired through polk. I've fallen victim to the amplifier hum in both of my rt1000p speakers. I was curious if instead of repairing the built in amps, I could somehow bypass the amp altogether and allow my receiver to power the bass speakers with a bit of rewiring. It appears as though both of my amps have gone bad and I'm hesitant to have them sent in for repairs as repair costs are a bit of a concern for me at the moment. Any feedback would be greatly appreciated.
Post edited by Dshib1000 on
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Comments

  • HTguru1982
    HTguru1982 Posts: 1,066
    edited June 2011
    Just forget the subs all together. Turn the subs off, take the jumpers off and only use the top terminals. I do this with my RT1000i's and it works fine. My subs and amps both work but I don't feel they contribute anything to the overall sound. I have a separate sub woofer that handles low frequency effects anyway.
    Display: Sony 42" LCD
    Sources: Harman Kardon DVD-27,
    Panasonic DMP-BDT110 blu ray player
    AVR: Sony STR-DA2400ES
    Amps: Sonance Sonamp 260(fronts),
    Kenwood KM-894(surrounds)
    Fronts: NHT 2.5
    Center: NHT VS-1.2A
    Surrounds: NHT Super One
    Subwoofer: SVS PB10-ISD
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  • Dshib1000
    Dshib1000 Posts: 3
    edited June 2011
    Thanks for the input and the idea HT, but unfortunately I don't have a dedicated sub. I depend on my rt1000's for bass production :frown:
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  • [Deleted User]
    [Deleted User] Posts: 7,658
    edited June 2011
    Hello,
    I don't believe attempting to operate the woofer from your receiver, bypassing the bass amplifier, would work very well. The bass amplifier provides the low pass filtering, allowing the woofer to blend with the rest of the speaker. The other problem is that the woofer wouldn't have the same sensitivity as the rest of the system, meaning it needs the built-in amplifier to play at the same volume as the midrange and tweeter.
    What you could do is get one of the bass amps repaired and unplug the second speaker's amp. This should give well balanced sound with just one amp functioning until you could have the second one serviced.
    Regards, Ken
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  • nwohlford
    nwohlford Posts: 700
    edited June 2011
    If both subs starting humming at the same time, it could be a ground loop issue. This would only be apparent in the subs since it is 60Hz. This is most likely if you add something to your system around the time the humming started.
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  • Dshib1000
    Dshib1000 Posts: 3
    edited July 2011
    well thank you guys for the responses. looks like i'll just have to save up and send in for repairs.
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  • Gatecrasher
    Gatecrasher Posts: 1,550
    edited July 2011
    I would definitely eliminate ground loop as a possible cause first. It's not very likely that both amplifiers would fail simultaneously as nwohlford mentioned.

    I had a hum problem with my CS1000p and it turned-out to be a ground loop issue.
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