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DTS-ES Rear Centre set up ??

Discussion in 'AV Receivers & Amplifiers' started by JAMESDAVIS, Oct 5, 2001.

  1. JAMESDAVIS

    JAMESDAVIS
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    I have a Marantz SR7200 and want to find out whether I need to use 1 or 2 speakers for DTS-ES encoded DVD's such as Gladiator, Seven etc.as part of the centre rear setup with my amp.I have spoken to several T*&%s in Retail stores who seem more interested in patronising me than actually answering the question ! At the back of the Amp I have available just the 1 red and black speaker for surround centre so does this naturally answer my question or is it more complicated ? I may also use my old centre ( Kef 80C )as the centre rear ? Any thoughts on that as well ? Your advice would be greatly appreciated...... :eek:
     
  2. HouseofMu

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    the last issue of HCC had a supplement that covered such issues.

    It recommended two sets of rears, of different types (dipoles/monopoles etc), and their positioning.

    Check it out.

    n.
     
  3. t-force

    t-force
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    The technical reason given for using two speakers at the back of an EX/ES set-up is that when sound comes from an angle greater than 150 degrees away from the front of you (ie the centre speaker), the brain has problems recognising that sound as actually being behind. It thinks that it's coming from in front!!
     
  4. Jase

    Jase
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    Hi

    If the Marantz only has 1 speaker terminal then you can only connect 1 speaker to it!! :D

    Whilst 2 are recommended, this is for the likes of the Denon´s etc that have 2 speaker terminals for the rear centres.

    On my Denon i have 2 speakers connected but only use 1 of them as due to placement/room i cant get between the 2, i sit in front of the rear left centre.

    All depends on room size etc etc

    cheers
    Jase
     
  5. LV426

    LV426
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    Not entirely true. It is always better to use two speakers for the reasons stated above (House of mu and T Force). If you only have one output, wire the two speakers in series.
     
  6. t-force

    t-force
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    ...or parallel
     
  7. LV426

    LV426
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    With a parallel connection, you run the risk of overloading the Amplifier because you effectively halve the impedance of the speakers. 2x 8ohm speakers, in parallel, will have a net impedance of 4 ohm.

    Conversely 2x 8ohm speakers in series will have an impedance of 16ohm - safer.
     
  8. Reiner

    Reiner
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    Disagree: 2x 8 in parallel (any amp should be able to handle 4 Ohm) and 2x 4 Ohm in series.
     
  9. LV426

    LV426
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    Right, but anybody who has dug deeper into speaker impedances will find that, even a speaker with a nominal 8 ohm impedance will have an actual impedance which varies with frequency - eg between 4 and 8 (or more).

    If it was MY amp - I wouldn't take the risk. Series to double the impedance, rather than parallel to halve it is safer.
     
  10. Confucius

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    True, my BP2002s and CLR2000 are nominally rated at 8Ω, though dip into the low 3Ω and even high 2Ω range at certain freqs.
     
  11. Reiner

    Reiner
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    The same applies to 4 Ohm speakers, they can dip as low as 1 Ohm (or even less), so if they work with the amp then 2x 8 Ohm in parallel will surely work, too. No risk as most amps have an overload protection anyhow.
     
  12. Dumfy

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    Hi All,

    I'm picking up my Marantz 7200 tomorrow and would like to include a single rear centre speaker as well. I'll be using the KEF Eggs sub/sat system and was wondering if anybody knew whether it's possible or not to get a single "egg" for this purpose.

    Regards

    :)
     
  13. Nic Rhodes

    Nic Rhodes
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    Speak to Ron Locke, I sure he will be able to help some how. He is the Kef rep and visits these boards. A quick search will find his details.
     
  14. Dumfy

    Dumfy
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    Many Thanks Nick.

    Great help.

    I'll see if I can find him.

    Mark

    ;)
     

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