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P90/3 with 4ohms/8ohms speakers

Discussion in 'Arcam Owners' Forum' started by David-Bel, Nov 12, 2004.

  1. David-Bel

    David-Bel
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    Can I safely connect a 4Ω speaker (Dynaudio 122C) to the center channel of my P90/3 along with my current 8Ω speakers for the rears?

    I guess there shouldn't be any problem, but I want to be 100% sure.

    Thks,
    David
     
  2. ANDY_DUTTON

    ANDY_DUTTON
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    Hi David,

    Yes you can connect it with no problem at all. The amps are completely independant.

    Regards,
    Andrew
     
  3. David-Bel

    David-Bel
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    Great!
    Thks for the quick reply Andy.

    Cheers,
    David
     
  4. RaceTripper

    RaceTripper
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    Andrew...

    Interesting. Then I have a related question.

    I have a Alpha 10P/3. Is the same true for it? If so, then does this logic follow...

    The Alpha 10P is rated 2 x 173W into 4R (this from the legacy pages at the Arcam web site).

    Normally, I would think that with 3 channels driven, available power is less, say 3 x 160W into 4R. But if the 3rd amp is independant, do I then get 3 x 173W into 4R ohms with all 3 channels driven?

    Not that it's a big deal. Just curious...

    Dean
     
  5. ANDY_DUTTON

    ANDY_DUTTON
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    By independant what I mean is it has a seperate winding on the transformer and will have no problem with different impedance speakers on the different outputs. This means that it will be better isolated than a normal amplifer that shares the same winding. However you will still see some drop in power as the same transformer primary winding is used. So as power is drawn off the supply there will be a drop in power due to the losses in the primary (winding attached to the mains) winding. Sorry Ican't give you exact figures its not something we measure.

    Regards,
    Andrew
     
  6. RaceTripper

    RaceTripper
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    Thanks for the explanation Andrew. That makes sense.

    I'm using both an Alpha 10 Integrated and an Alpha 10P/3. I have it setup to drive the L/R mains from the 2 channel Alpha 10 Int., and the center + side surrounds from the 10P/3. The AVR300 drives the rear surrounds. These are all 4 ohm Dynaudios. That seems the most logical arrangement to me.

    I may still get an Alpha 9 to drive the rear surrounds.
     

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