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  1. #1

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    Default AV Receiver / Speakers Power Rating Matching

    Hello everyone,
    I would really appreciate if you could help me clarifying the following issue for me 

    The specification sheet of my receiver (Onkyo TX-NR727) stats that the output power is 110 Watts per Channel (8 Ohms, 20 Hz 20 kHz, 0.08% THD) and I am planning to install the following 7.1 combination?
    QTY-1 Subwoofer PSW series PSW505
    QTY-2 Monitor 70 II (Front R+L) 275 Watt each
    QTY-1 Polk CS20 (Central) 175 Watt
    QTY-4 Monitor 30 II (Surround) 100 Watt each

    My question, are those surround speakers (Qty-4, monitors 30 II) will be affected at high volume considering their max power rating is 100 W where is the amplifier will be giving 110 W.

  2. #2

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    My response is NO!... In fact (under-power at full volume is dangerous, burn tweeter!)...Set your speakers also to "SMALL"

  3. #3

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    Quote Originally Posted by ALSATIAN in USA View Post
    My response is NO!... In fact (under-power at full volume is dangerous, burn tweeter!)...Set your speakers also to "SMALL"
    Thank you ALSATIAN, do you recommend me to upgrade them to M40 instead?

  4. #4

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    Forget you ever read the max power stuff. Set your speakers to small. Consider buying a Pioneer Elite SC series the next time.

    BTW, that 110wpc rating is with only 2 channels driven, with 7 channels driven your AVR is putting out 45wpc.

    Test results, http://www.soundandvision.com/conten...eceiver-page-3
    '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."

  5. #5

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    Quote Originally Posted by F1nut View Post
    Forget you ever read the max power stuff. Set your speakers to small. Consider buying a Pioneer Elite SC series the next time.

    BTW, that 110wpc rating is with only 2 channels driven, with 7 channels driven your AVR is putting out 45wpc.

    Test results, http://www.soundandvision.com/conten...eceiver-page-3

    Many thanks to you F1nut, I am new to this business and everyday I am learning :)

  6. #6

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    What you want to do is let the sub woofer carry the bass (speakers set to small) that way you don't need as much power.
    Bass and volume is where the power needs really goes up.
    Also you don't need to play it so loud that your ears bleed okay.
    You don't have a very large room, like 30 x 20?
    Don't put your Onkyo in an enclosure because as it gets hot,
    your power output goes down and so does the life
    of you unit.
    A rule of thumb is twice as loud means 10X the power.
    My Onkyo never goes over 60, it's limited, and always comes on at 25,
    set the limits on yours.
    POLK SDA 2.3 TLS BOUGHT NEW IN 1990, Gimpod/Sonic Caps/Mills RDO-198
    POLK CSI-A6 POLK MONITOR 70'S ONKYO TX NR-808 SONY CDP-333ES
    PIONEER PL-510A SONY BDP S5100
    POLK SDA 1C BOUGHT USED 2011,Gimpod/Sonic Caps/Mills RDO-194
    ONKYO HT RC-360 SONY BDP S590 TECHNICS SL BD-1

  7. #7

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    Quote Originally Posted by PolkieMan View Post
    What you want to do is let the sub woofer carry the bass (speakers set to small) that way you don't need as much power.
    Bass and volume is where the power needs really goes up.
    Also you don't need to play it so loud that your ears bleed okay.
    You don't have a very large room, like 30 x 20?
    Don't put your Onkyo in an enclosure because as it gets hot,
    your power output goes down and so does the life
    of you unit.
    A rule of thumb is twice as loud means 10X the power.
    My Onkyo never goes over 60, it's limited, and always comes on at 25,
    set the limits on yours.

    Thank you PolkieMan for such great info, however, can you elaborate more on "A rule of thumb is twice as loud means 10X the power. "

  8. #8

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    Well it is not as you think most of people would think that twice as loud is only 2x the power.
    In order to understand this more clearly we have to look at decibels and watts.
    Now I usually have my system a 70-80 decibels and in 2 channel mode, Onkyo pure Audio
    (that's where you are getting the rating advertised like 105 WPC).

    http://www.parts-express.com/mini-di...m_campaign=pla

    http://www.audiology.org/practice/re...Chart16x20.pdf

    Play around with this calculator and you will see what I mean, try changing the decibels from 80 to 90, wow see

    http://www.crownaudio.com/elect-pwr-req.htm

    Quote Originally Posted by essaabbas View Post
    Thank you PolkieMan for such great info, however, can you elaborate more on "A rule of thumb is twice as loud means 10X the power. "
    POLK SDA 2.3 TLS BOUGHT NEW IN 1990, Gimpod/Sonic Caps/Mills RDO-198
    POLK CSI-A6 POLK MONITOR 70'S ONKYO TX NR-808 SONY CDP-333ES
    PIONEER PL-510A SONY BDP S5100
    POLK SDA 1C BOUGHT USED 2011,Gimpod/Sonic Caps/Mills RDO-194
    ONKYO HT RC-360 SONY BDP S590 TECHNICS SL BD-1

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