Yamaha Real Watts

Discussion in 'Archived Threads 2001-2004' started by altan, Dec 12, 2002.

  1. altan

    altan Stunt Coordinator

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    My Yamaha 5250 is rated

    Minimum RMS Output Power per Channel
    - MAIN, 20Hz-20kHz, 0.06% THD, 8 ohms...100W + 100W
    - CENTER, 20Hz-20kHz, 0.06% THD, 8 ohms...100W
    - REAR, 20Hz-20kHz, 0.06% THD, 8 ohms...100W + 100W

    Does anybody know what the "real world" rating is? Specifically, what would the power be running all channels at the same time?

    Also, for what it's worth, the specs say the power supply is approximately 310 watts... Can I assume this means the receiver is really about 60 watts per channel?!?

    ... Altan
     
  2. Wayne A. Pflughaupt

    Moderator

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    Probably even worse than that. You might want to take a look at this post from a few months ago.
    Elsewhere in the thread, it has a link to a site that goes into some detail on this very subject. However, the link will send you to the post with a synopsis of that link. You’ll be shocked to see the info on what the “500 watt JVC” is really putting out!
    Regards,
    Wayne A. Pflughaupt
     
  3. Chu Gai

    Chu Gai Lead Actor

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    Makes those mid 70's products look awfully compelling doesn't it? The problem unfortunately, is that at this time the FCC doesn't have a specification for manufacturers when it comes to something other than 2 channel amplification. So we see the funny numbers game being played out once again with consumers having to rely more and more upon reviews of equipment that measure things like power and distortion over a specified frequency range.
     
  4. Yogi

    Yogi Screenwriter

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  5. altan

    altan Stunt Coordinator

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    Man, this sucks.

    So do most people's HT survive this way?!!?

    It's hard to believe the average joe purchases a $1100 parasound amp...???

    Is it fair to say you should always purchase a receiver that has a power supply rated with higher watts than the combination of all channels? (at least if you want any chance of obtaining these "rated" results?)

    ... Altan
     
  6. Yogi

    Yogi Screenwriter

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    You'll be surprised to know that you only use a few watts most of the time with average 89db/w/m sensitivity speakers in a small to medium sized HT room, at reference levels. Its usually the dynamic peaks in DD movies that require 20 db headroom which translates to 100 times more power. Its during those short transient peaks that a mass market receiver would clip where it would run out of juice. And depending on the duration of the transient the average Joe doesn't even realise that his amp or receiver clipped. They probably cringe in their seats from the terribly distorted sound thinking 'dude...that was loud', without even realizing that their amp clipped.

    So if you have a small HT room and listen at moderate volumes (a few db below reference) which most of us do, you wont be pushing your receiver that hard and probably wont ever go into hard clipping during any movies. In that case a receiver that puts out between 40-60W/channel continuously will serve you well.
     
  7. Guy Usher

    Guy Usher Supporting Actor

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    You will find all channels driven full bandwidth RMS under 30 wpc. As stated by Yogi your reciever doesnt need all the power to all the channels (DVD Audio watchout) seldom do the rears use 1/4 of a watt in 5.1, biggest user is center (up to 80%) the others are mostly effects. Set all your speakers to "Small" and let the sub carry the mail.
     

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