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Denon AVC-11SR & 4 ohms

Discussion in 'AV Receivers & Amplifiers' started by witters, Dec 10, 2003.

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  1. witters

    witters
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    Thinking of buying one of these and I'm a bit concerned re it's suitability for driving 4 ohm speakers. I have Kef Reference 1.2 fronts and, hopfully soon, a 200C centre.

    Any help appreciated.
     
  2. alexs2

    alexs2
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    Dont think you should worry too much.....whilst it won't double it's output into 4ohm loads,it does tolerate them well,and still delivers decent power.

    On that point,not many amps do truly double the output into decreasing loads.
     
  3. Dimmy

    Dimmy
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    From the paper specs the A11SR doesn't look to handle 4Ohm Loads too well, with only a very slight increase in power output (which tends to suggest it's running out of steam).

    I haven't 'tried' it with 4 Ohm loads, but I'm guessing it wouldn't handle them too well.
     
  4. nfordenfield

    nfordenfield
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    It will work, I used a denon 1se with my ref 3.2's and 200c, you are really not getting anywhere near what these speakers can do.

    power amps are a must for a future upgrade.

    True power amps should nearly double into 4ohm.
     
  5. alexs2

    alexs2
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    Absolutely right.....true decent power amps should,but not a huge number actually manage that,and fewer multichannel amps with ALL channels driven...the number that will double again into 2 ohms or less can be counted with very little trouble.
     
  6. Dimmy

    Dimmy
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    The A1SR increases pretty significantly, I think it's a jump from about 180w with 8 Ohms to 304w with 4 ohms.

    I think the only amps that actually 'double' with all channels driven are the hugely expensive Krell poweramps...
     
  7. alexs2

    alexs2
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    Quite right in terms of Krells.....most Levinsons will do the same trick,and there are a number of proper high end power amps will do as well...but it all comes down to power supply design,and load tolerance....and then cost!
     
  8. witters

    witters
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    I'm now even more confused!!!

    Is the concensus yes or no?:confused:
     
  9. Dimmy

    Dimmy
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    Depends who you ask it seems :D

    I'd say no, and that an A11SR wouldn't realise the full potential of your speakers, I imagine it's possible the amp would shut off when driving them at reference levels. Were I you I'd go for an A1SR/KAVC-A1SE/A1SE in the second hand market.

    Dimmy
     
  10. Smurfin

    Smurfin
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    Ian J uses an A10se with his M&K Pro speakers and it runs them fine, do a search under 4ohm speakers or something like that to get some more opinions from people who have actually tried it rather than the speculators.
     
  11. Dimmy

    Dimmy
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    I've read in various threads that the speakers in question are known to dip as low as 2 ohms quite often Matt, try not to get your knickers in a twist over people who 'speculate' ;).

    Dimmy

    [edit]

    Also note that the AVC-A10SE has only five poweramp channels.
     
  12. Reiner

    Reiner
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    IMHO it is not problem as long as you keep the volume on a normal level.
     
  13. Jase

    Jase
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    It will be fine. Setting all speakers to small and all bass to the sub will ease the load as well. If you start asking it to run seven full range channels into 4 ohm speakers, then yes, it will be strained. To pass THX Ultra certification it has to be able to cope with loads down to 3.2 ohms without shutting down. :)
     
  14. Jase

    Jase
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    Two channels driven only. The figure for all channels driven into 4 ohms was about 225 watts if I remember correctly. :)
     
  15. Smurfin

    Smurfin
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    I'm not, I'm simply going on the experience of hearing them for myself and an amp of that power range not having any problems.

    And this IS speculation:rolleyes: and therefore not particularly helpful...
     
  16. Jeff

    Jeff
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    Witters,

    What size room do you have?
    What is the seating distance from the speakers?
    Will they be configured as large or small?
    What volume do you normally listen at?
     
  17. witters

    witters
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    Approx 15ft square, seated about 10ft from the fronts. Configured as large and listen at -18db on my amp
     
  18. Jeff

    Jeff
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    In that case I'm sure it will be fine. :)
     
  19. Dimmy

    Dimmy
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    Speculation and the theory behind the physics of driving seven speakers are two very different things.
     
  20. Smurfin

    Smurfin
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  21. Dimmy

    Dimmy
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    :D - I know you're just wanting fellow forum members to get the 'best' advice matt ;).

    Dimmy
     

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