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I want a three channel set up.

Discussion in 'AV Pre-Amp/Processors & Power Amps' started by paulr, Nov 8, 2004.

  1. paulr

    paulr
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    Was one/or is one available?
    Basically its for my bedroom,use my two existing hi-fi speakers and just get a centre speaker to put on the portable.
    Dont want 5.1 too many wires etc.

    cheers
    Paul.
     
  2. Mylo

    Mylo
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    I'm certain you can do this quite easily with most normal 5.1 receivers by setting the unused outputs to off or phantom. The sound will be mixed into the channels you are using.
     
  3. paulr

    paulr
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    Thanks.
    Has anyone done this/thought about doing it/or is it a daft idea.
    (going three channel that is)
     
  4. Mylo

    Mylo
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    Not daft at all, the power and range you get from an amplified setup kicks the p*** out of most TV's. Fitting rear speakers in a suitable position is nigh on impossible for in bed viewing.

    :oops: Saturday night my mate and I watched a film and he loved the sound. Imagine my shock and :blush: when I noticed the amp wasn't on for the fronts :suicide: :rotfl:
     
  5. lowrider

    lowrider
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    For the bedroom, assuming you sit/lay always on the sweet spot, all you need is stereo, cheaper or better sound for the money, just get a DVD player if you dont have one already...
     
  6. Dean

    Dean
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    FWIW i would investigate in getting some discreet wallmounted rears for full 5.1, unless your bedroom is really small and in a weird shape. I have my main system in my bedroom and the Mission 77ds are very discreet to the eye. Just get some flat ribbon type speaker cable and you can even paint over it to hide wires completely. Jst my 2pence.
     
  7. paulr

    paulr
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    Except the speakers are not next to the tv,they are about 4ft each side and it seems there is no sound coming from the tv iteslf.All i need is a centre speaker.
     
  8. lowrider

    lowrider
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    In that case I agree a center speaker will help, but it should match the front speakers...
     
  9. paulr

    paulr
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    My amp is a pioneer a400,speakers tannoy m20's about 10 yr old.pioneer 717.
    What about buying a processor off ebay and connecting this to my amp,that should give me a cheap 3 channel set up.
     
  10. Mylo

    Mylo
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    Yammy DSP-E800 would do the trick nicely, they come up for sale here quite often :)
     
  11. eviljohn2

    eviljohn2
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    If you want to come down to Bath I'm trying to sell a Denon 1802 receiver which would be right up your street. :)
     
  12. paulr

    paulr
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    Thanks for the offer,but its not really what i'm after.
     
  13. paulr

    paulr
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    A really simple question,

    I have a dvd player,a stereo amp and some speakers.
    If i get a decoder where does this fit in.
    If it goes between the amp and speakers will this not degrade the sound when i'm listening to cd's,ie not wanting multi channel?

    thanks
    Paul.
     
  14. paulr

    paulr
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    *question2*

    is there any way to connect in a centre speaker to my stereo amp?
     
  15. lowrider

    lowrider
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    Get a DVD player with decoders and you wont have any problems... :cool:
     
  16. sfrench

    sfrench
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    What you need is a surround sound processor, this will take a digital signal from your dvd player or computer and split it into the seperate channels, this will allow you to use your exising equipment, and allow for future expansion. You will however also need to amplify the center speaker channel seperately with another amplifier of sorts.

    The surround sound processor will allow you to choose which channels to enable, for example on my technics sh-ac300 I use a coax digital signal and split it to a 4 speaker configuration, i have disabled the center speaker and the sub.

    If the idea of buying another amp etc doesnt float your boat perhaps you should consider buying a av/reciver, it will do the same but have an amp built in, therefore you may miss some quality..

    :)
     
  17. paulr

    paulr
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    I'm getting confused here.
    I thought you could just add a decoder to a stereo amp and get 5.1.I never realised you need another amp for the other channels.

    is a decoder the same as a processor btw?
     
  18. Mandel

    Mandel
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    "is there any way to connect in a centre speaker to my stereo amp?"

    There is but it's not an ideal solution. Just results in a centre speaker playing 50% left and 50% right. Just requires a couple of extra speaker wires.
     
  19. sfrench

    sfrench
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    paulr, I mean surrond sound processor (in full) it decodes the 5.1 digital signal into analouge outputs for amplification.

    Therefore if you have a sterio amp (i.e. two channel: left & right) you can only amplify two channels, i.e. front left, front right.

    You then need to amplify center seperately.

    An AV Reciver usually has the amplification circuits built in, and therefore amplifys all 5 channels.
     
  20. Mylo

    Mylo
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    Thats where the Yamaha DSP-E800 is superior, it decodes all and amplifies three of the channels (both rears and centre). Hook it up to a stereo amp and there you go. Set the rears to OFF and the sound will be redirected to the speakers you are using.
     
  21. paulr

    paulr
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    Thanks guys for the info.
     
  22. GaryG

    GaryG
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    Do a search in google for 'Haffler Effect'.

    It was popular in the 70's, you connect your speaker across the L + and R + terminals to extract the out-of-phase information giving more ambience. Usually the extra speaker(s) are added at the rear rather than the center.
     
  23. Mandel

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    GaryG> As per my previous comment, Hafler matrices don't really produce a particularly effective centre effect. Producing an extra signal which contains the Left + Right + Out-Of-Phase - Common elements is easy. I've never seen a simple passive way of isolating the common elements, if you know one I'd love to know how!
     
  24. GaryG

    GaryG
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    Dual voice coil speaker.

    Connecting the Left channel to one coil and the Right channel to the other coil gives you the 'sum' of the stereo signal.
     
  25. Mandel

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    The 'sum' of the stereo signal still contains all the elements in both the left and the right speakers though...
     
  26. GaryG

    GaryG
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    The out of phase information between the channels is cancelled out due to the opposing magnetic fields generated by the voice coils, therefore there is no movement of the speaker cone, so the signal most definitely does not contain 'all' elements of the stereo signal.
     
  27. Mandel

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    Ah this is true. But unless its a surround encoded source the out of phase elements will be very few...
     
  28. bjd

    bjd
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    There is a Yammy DSP E800 for sale in the classifieds @£90.......a bargain for what you want at that price.

    Brian
     
  29. paulr

    paulr
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    Thanks,but i'm not sure i want another box in my room.
     
  30. bowlhead2000

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    Well, if your current box doesn't do what you want, and you don't want to add a second box, then the only answer is to replace your existing box with something that does what you want.

    One option is a prologic amp (prologic lets you have a couple of back speakers, but they aren't full range, i.e. don't take any bass, and are mono not stereo). Alternatively get a full 5.1 dolby digital/ dts amp. Either way you will have spare speaker outputs but never mind, that's called 'future proofing' :)

    5.1 is probably more common than prologic these days as the world has moved on a lot in the last 5 years and everyone selling home cinema amps assumes you want proper 5.1. However in the classified ads (and at the very bottom end of the hifi spectrum when buying new), you can probably pick up prologic-only.
     

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