All Channels Driven

math wizard
math wizard Posts: 106
edited January 2008 in Electronics
I've searched this forum and have not found a satisfactory answer to this question. How can I tell if the power rating for my AVR is for "all channels driven?" I have a Yamaha RX-V2500 which is rated at 910 watts (130 watts x 7 channels). This is a considered a high current amp. From the users manual, it is not clear if it means all 7 channels or just 2 channels. Can someone here tell the answer or atleast point me in the right direction so that I can find it? All replies are appreciated.
Processor - Emotiva UMC-200
Pre-Amp (2 Ch) - Emotiva USP-1
DSP Minidsp nanoAVR DL
DAC (2 Ch) - Emotiva XDA-2
Amp (Fronts) - Emotiva XPA-2
Amp (Center/Surrounds) - Emotiva XPA-3
CD - Emotiva ERC-1
Fronts - Polk Audio RTi 12
Center - Polk Audio CSi5
Rears - Polk Audio RTiA1
Sub - Epik Knight
Sub EQ - Velodyne SMS-1
Monitor - Sony XBR65X850C
Blu-Ray - OPPO BDP-203
Network Media Player - Chromecast Ultra
Power Conditioner - APC H15
Power Conditioner - Emotiva CMX-2
PVR - DirecTV C61k
Remote - Harmony Touch w/Hub
Post edited by math wizard on
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Comments

  • disneyjoe7
    disneyjoe7 Posts: 11,435
    edited January 2008
    I seriously doubt an receiver of any maker will put out 930 watts total. But saying that must AVR / receivers have inflated true output rating. Look at the tread "Show me your guts" and look for some amp's which are true rated output, start looking at the transformers, the filter caps needed to put that kind of wattage.

    Saying that relax if your receiver have preamp outputs, enjoy it today, learn and or grow from it.

    Speakers
    Carver Amazing Fronts
    CS400i Center
    RT800i's Rears
    Sub Paradigm Servo 15

    Electronics
    Conrad Johnson PV-5 pre-amp
    Parasound Halo A23
    Pioneer 84TXSi AVR
    Pioneer 79Avi DVD
    Sony CX400 CD changer
    Panasonic 42-PX60U Plasma
    WMC Win7 32bit HD DVR


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  • wallstreet
    wallstreet Posts: 1,405
    edited January 2008
    Probably something in between. You certainly won't get 130x7 with all channels driven. I found a review for the 2600 which is a 130x7 also. At 6 channels driven at 1KHZ, the output was 119wpc. With 7ch driven, your results will even be less. Here's the link, http://www.soundandvisionmag.com/receivers/1497/test-bench-for-shootout-three-mid-price-av-receivers-page3.html

    IMO, those are respectable numbers.
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  • math wizard
    math wizard Posts: 106
    edited January 2008
    Thanks. I look at the review and thought that the numbers are respectable also. Not far off from the spec. at 6- channels driven. I could not find the
    "Show me your guts" thread.
    Processor - Emotiva UMC-200
    Pre-Amp (2 Ch) - Emotiva USP-1
    DSP Minidsp nanoAVR DL
    DAC (2 Ch) - Emotiva XDA-2
    Amp (Fronts) - Emotiva XPA-2
    Amp (Center/Surrounds) - Emotiva XPA-3
    CD - Emotiva ERC-1
    Fronts - Polk Audio RTi 12
    Center - Polk Audio CSi5
    Rears - Polk Audio RTiA1
    Sub - Epik Knight
    Sub EQ - Velodyne SMS-1
    Monitor - Sony XBR65X850C
    Blu-Ray - OPPO BDP-203
    Network Media Player - Chromecast Ultra
    Power Conditioner - APC H15
    Power Conditioner - Emotiva CMX-2
    PVR - DirecTV C61k
    Remote - Harmony Touch w/Hub
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  • WilliamM2
    WilliamM2 Posts: 4,806
    edited January 2008
    Yamaha rates them with two channels driven. Here is a review, it did meet the published specs:
    http://www.audioholics.com/reviews/receivers/yamaha-rx-v2500/rx-v2500-benchmark-tests-part-1
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  • wallstreet
    wallstreet Posts: 1,405
    edited January 2008
    You know what's interesting about that review is that in 4 ohm setting, the power output at 20hz for 1ch is 199wpc as opposed to 147wpc in 8 ohm setting. This is what I would expect. But when you look at the 2ch ratings for 4 and 8 ohm, the power is less in 4 ohm (119wpc) than 8 ohm (135wpc). This is not what I would expect.
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  • disneyjoe7
    disneyjoe7 Posts: 11,435
    edited January 2008
    math wizard wrote: »
    Thanks. I look at the review and thought that the numbers are respectable also. Not far off from the spec. at 6- channels driven. I could not find the
    "Show me your guts" thread.


    Sorry I gave you the wrong thread name but here's a link of what I was talking about. http://www.polkaudio.com/forums/showthread.php?t=26433

    Speakers
    Carver Amazing Fronts
    CS400i Center
    RT800i's Rears
    Sub Paradigm Servo 15

    Electronics
    Conrad Johnson PV-5 pre-amp
    Parasound Halo A23
    Pioneer 84TXSi AVR
    Pioneer 79Avi DVD
    Sony CX400 CD changer
    Panasonic 42-PX60U Plasma
    WMC Win7 32bit HD DVR


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  • ward91
    ward91 Posts: 338
    edited January 2008
    my old marantz sr4400 apparentley was capabale of driving all channels continuasley, however one day i decided to try this by splitting a stereo signal into 3 sets of them and then compensating for the loss over each chanel by adding 6db. it did drive them without clipping (to my reconing), but the sound was quite harsh. and the amp soon got verry hot.

    one thing i cant understand is why the amp said power consumption was 315watts and the power output was 6x 80wrms @ 8ohm and 6x 95wrms @ 6ohm (min), that means that the out is bigger than the in , that is impossible.
    ELECTRONICS
    arcam cd93
    linn wakonda
    MC2 MC450
    Teac ud h01 DAC


    SPEAKERS
    Tannoy DC6 t se .
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  • unc2701
    unc2701 Posts: 3,587
    edited January 2008
    wallstreet wrote: »
    You know what's interesting about that review is that in 4 ohm setting, the power output at 20hz for 1ch is 199wpc as opposed to 147wpc in 8 ohm setting. This is what I would expect. But when you look at the 2ch ratings for 4 and 8 ohm, the power is less in 4 ohm (119wpc) than 8 ohm (135wpc). This is not what I would expect.

    Know that impedence switch in the back? That's why you leave it in the 8 ohm position.
    Gallo Ref 3.1 : Bryston 4b SST : Musical fidelity CD Pre : VPI HW-19
    Gallo Ref AV, Frankengallo Ref 3, LC60i : Bryston 9b SST : Meridian 565
    Jordan JX92s : MF X-T100 : Xray v8
    Backburner:Krell KAV-300i
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  • jakelm
    jakelm Posts: 4,081
    edited January 2008
    My HK has this. Which I take as all channels driven.
    Monitor 7b's front
    Monitor 4's surround
    Frankinpolk Center (2 mw6503's with peerless tweeter)
    M10's back surround
    Hafler-200 driving patio Daytons
    Tempest-X 15" DIY sub w/ Rythmik 350A plate amp
    Dayton 12" DVC w/ Rythmik 350a plate amp
    Harman/Kardon AVR-635
    Oppo 981hd
    Denon upconvert DVD player
    Jennings Research (vintage and rare)
    Mit RPTV WS-55513
    Tosh HD-XA1
    B&K AV5000


    Dont BAN me Bro!!!!:eek:
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  • mhardy6647
    mhardy6647 Posts: 34,913
    edited January 2008
    The FTC had (still has, AFAIK) a very stringent way to report power for two channel amplifiers for home use. Car audio and multichannel formats always were and still are exempt from the letter of the law. As a consequence, there is no standard, and manufacturers can (and do) report whatever they see fit. The better manufacturers at least tell you what their standard is.
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  • Serendipity
    Serendipity Posts: 6,975
    edited January 2008
    I'd doubt it. My Onkyo TX-SR702 is rated at 7*100W, yet IIRC in Sound and Vision they tested all channels driven and found it to be only 52WPC.
    polkaudio RT35 Bookshelves
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    Front projection, 2 channel, car audio... life is good!
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