Using HT Reciever as a Stereo Amplifier - Pushing 6 ohm Speakers

Discussion in 'AV Receivers' started by mrdontknow, Jun 17, 2013.

  1. mrdontknow

    mrdontknow New User

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    So my old Fisher Stereo amplifier finally died, it was a great unit, but 30 years old.

    I have an HTIB amplifier, Onkyo HT-R510, that doesn't support HDMI. So I bought an updated one for my HT.

    I want to use the Onkyo as a Stereo amplifier for both indoor and outdoor. Problem is my outdoor speakers are Yamaha's that are 6 ohm, the Onkyo outputs 8 ohms.

    I hooked it up, not a lot sound, and when I cranked up the volume the amp must have overloaded and shut down. I hooked up the original speakers, everything works.

    I have tried the Yamaha's as both A & B speakers to no avail. Do I have to ditch my Yamaha's or is there something I can do to use the amp with them.

    I've done some research, but I'd really like a link to speaker impedance vs amp output.

    Thanks for your help,

    MrDontKnow
     
  2. gene c

    gene c Producer

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    I guess the Onkyo is O.K. with the indoor speakers?

    I'm very surprised the Onkyo shut down when connected to 6 ohm speakers. Onkyo's, even of that vintage, have always had fairly strong amp sections. I wonder if there's something else that caused it like bare strands of speaker wire touching the receivers cabinet. Maybe those Yamaha's are really much lower then 6 ohm. I'm currently running two sets of 4 ohm speakers with two different 8 ohm receivers and nothing has shut down (yet!). The Onkyo should be able to handle 6 ohm speakers, with plenty of output.
     
  3. Phil A

    Phil A Producer
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    Are you using both sets of speakers at once? How long are speaker wire runs and what are you using?
     
  4. schan1269

    schan1269 HTF Expert
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    Something else is up beyond the outdoor speakers being 6ohm. How many are there? 2? 4?
     
  5. mrdontknow

    mrdontknow New User

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    First, thanks for the responses.

    To answer the questions:
    1) 2 Indoor Polk speakers R50's (8 ohms) 2 outdoor Yamaha's (6ohms)
    Output could be heard from the Polk speakers, but not Yamaha's
    When cranked up, Onkyo cut out.
    Waited 5 min's, tried again, same result.

    2) 2 Indoor Polk Speakers worked fine running alone.

    3) 2 outdoor Yamah 's connected to B speaker lines
    Same results as #1

    4) 2 outdoor Yamaha's connected to A speaker lines (surrond front)
    Same results as #1

    Inside Speaker wires are good ones, not great big ones, but are older, 14 guage
    if I remember correctly, Length: 35 feet

    Outside wires, run through the walls to the outside.
    If I remember correctly 14/2. Length 50 feet

    This all did work very fine with my old Fisher, don't remember the model number though.
     

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