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Harman Kardon power question

Discussion in 'AV Receivers & Amplifiers' started by Kaleb500, Apr 9, 2004.

  1. Kaleb500

    Kaleb500
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    I am trying to decide what av amp to buy from pretty much every make in the the approximate 600 quid bracket :smoke:. now i just been reading about the HK AVR-330, and it seems very good. Although the wattage is only rated at 55wpc. I know Harmon have a very modest rating, but still, thats like half what my speakers are rated. Would this amp drive a monitor audio b2 5.1 package without danger of clipping? Also could someone explain why the HK are low watts but seem to be very powerful? Something to do with high amps? How would this amp compare to a pio ax3 in terms of power, despite the difference in rating? Many thanks :p. Sorry for the noobness :suicide:.
     
  2. russraff

    russraff
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    Let's compare the specs of Pioneer's AX3 and harman/kardon's 330:
    ---------------------------------------------------------------------------
    Pioneer AX3

    Power Output DIN 7x100W (1kHz, THD 1% and 6&#8486
    Power Output RMS (2 channel mode) 2x100W (20Hz - 20kHz, 0.09% and 6&#8486

    harman/kardon 330

    Power output Seven-Channel 7x55 Watts per channel @ <0.07% THD, 20Hz – 20kHz into 8&#8486
    Continuous Average Power2 channel mode): 2x65 Watts per channel, 20Hz – 20kHz, @ <0.07% THD, both channels driven into 8&#8486
    ---------------------------------------------------------------------------

    Firstly, look at the distortion figure. For the Pioneer it is 1%, whereas h/k's is 0.07%. In other words, h/k rate their receivers while reproducing a higher quality signal.
    Secondly, Pioneer show their ultimate power rating at only 1kHz, rather than the whole audio spectrum as h/k do.
    Thirdly, Pioneer use DIN specification to augment low watt ratings while running all seven channels. Note that in stereo the much more stringent (and standard) RMS rating is used, yet there is no change in power. This is a clue that the amp, whilst running all channels, may not be as powerful as initially indicated. h/k always use RMS.
    Fourthly, Pioneer use 6&#8486; loads, rather than a more standard 8&#8486; as h/k do. The lower the speaker resistance, the higher the theoretical amplifier power.
    Lastly, an amplifier supplies current to your speakers. It is this value that represents the true power of an amp. h/k traditionally make very powerful, high current, designs that drive speakers much better than their wattage ratings would suggest.

    This kind of power manipulation is reprehensible. More so from Pioneer as the AX3 is ironically quite a powerful amp.

    Hope this helps.

    Russell
     
  3. Kaleb500

    Kaleb500
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    Thanks Russ. That makes more sense now :clap:. Just out of curiosity, what one would you go for?
     
  4. Kaleb500

    Kaleb500
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    Would the 330 drive a monitor audio b2 5.1 set up? At what volume do you think it would start to struggle?
     
  5. Andywilliams

    Andywilliams
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    Hi kaleb
    The h/k 330 would have no trouble driving the b2 package it would hurt your ears before running out of steam unless you live in a mansion,I used to own the monitor audio silver range and used a nad t752 for amplification which also boasts real wpc same as the harman amps and it sounded great.If your really unsure try and get a demo of the nad or h/k range iam sure you will be delighted with the sound.
    Cheers Gonzo.
     
  6. Kaleb500

    Kaleb500
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    Cool thanks for reply. I think i'm sold :thumbsup:
     
  7. Kaleb500

    Kaleb500
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  8. Supra

    Supra
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    I have a H/K avr 8500 and hver never experienced this. It certainly would concern me and doesn't sound like an isolated incident with that model.

    having said that I have never heard of thta on this side of the pond before, If I was after that model I would be wary.

    I have no concerns with my H/K amp, it is built like a tank. However, you can set differnet levels for all the sound formats and inputs, it could be the case that those owners hadn't read the manual, which is very common.

    When I first played about with the different surround formats they would all vary in volume. It has taken some time but I have set all the levels for all the moddes and inputs I use. I have found this feature very useful.
     
  9. Kaleb500

    Kaleb500
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    From what i can make out it seems to be a problem with the earthing of the unit. I wonder if the UK models are earthed and the american ones not?
     

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