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Bass reproduction with no Sub Woofer

Discussion in 'AV Receivers & Amplifiers' started by webmuppet, Mar 8, 2002.

  1. webmuppet

    webmuppet
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    I have a (fairly cheap) Dolby Digital home theatre system with no Sub-Woofer.

    The AVR has large and small settings for front/centre/rear speakers and the instruction manual says that large should be selected according to bass reproduction capacity @ 80hz (might sound basic to you).

    The front speakers are 100watts and have a frequency response of 45-20000Hz and inpedance 4-8 ohms.

    These would be large then?
     
  2. bob007

    bob007
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    Yes they be large......... and if you have not allready done it, select NO SUB in the speaker configuration.
     
  3. webmuppet

    webmuppet
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    Thanks.. I've been wondering about that for a while.

    How far below 80hz does the speaker need to be rated to count as large? The rears are 70-20000Hz?
     
  4. Stuart Wright

    Stuart Wright
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    Unless the speaker goes down to 20Hz, it's small. Hardly any do.
    The advice for most people is to set all your speakers to small and use a sub for the LFE channel and all the other 5 channels from 80Hz down. Least ways this is a good place to start.
     
  5. webmuppet

    webmuppet
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    But at what point would it hurt the Speakers?
     
  6. Stuart Wright

    Stuart Wright
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    Well it wouldn't unless you put the wrong impedance in or drive them too hard (turn it up too loud).
    If the movie soundtrack has sound in it down to 20Hz in all the channels (and according to the Dolby spec it can - and IMO it often sounds like it does) then if your speakers don't go down to 20Hz and you don't have a subwoofer to take over the job, then you're not hearing the full soundtrack. So in short it won't sound as good as it could.
    IMO a subwoofer is absolutely essential.
     
  7. webmuppet

    webmuppet
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    Hmm. Trying to keep it as cheap as poss. I dont tend to watch movies to loudly but Im a fan of loud music (and we cant all work in the business).
     
  8. Reiner

    Reiner
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    It's not a question of "hurting" the speaker, is just a question of where the bass is reproduces, i.e. the speakers or the sub.
    Spectre is right but since you don't have a sub follow bob007's advise, else you will loose the LFE!
     
  9. MarkB

    MarkB
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    I think you'll find that you can't set "no sub" and "small speakers". If you watch the menu item you'll find that as you select no sub, the main FL and FR will revert to LARGE.
     
  10. Nic Rhodes

    Nic Rhodes
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    If you set L and R to small, it takes the stress off them. The difficult stuff goes to the sub which is designed to deal with them. This makes both the L and R work better and the sub works better. Result is overall better sound. Very few L and R can really deal with the low AV frequencies (15 - 40 hz/). Music is different however.
     
  11. Guest

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    That is not the case with mine anyway.I have no sub, and it is set to 'no sub', and i can still switch the fronts from L/S
     
  12. MarkB

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    That is not the case with mine anyway.I have no sub, and it is set to 'no sub', and i can still switch the fronts from L/S

    Which unit do you own?
     
  13. Guest

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    The sony db930, i'll just pop down stairs and check for sure. I'll eat my humble pie if i'm wrong, i don't mind admitting it:)

    I've just checked, and they remain on L or S with'no sub' set . I'm not trying to say that's the case with all av amps,i can only comment on mine:)
     
  14. Reiner

    Reiner
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    Assuming you set them to SMALL with NO SUB, will the lower bass then actually "vanish"?
     
  15. MarkB

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    The sony db930, i'll just pop down stairs and check for sure. I'll eat my humble pie if i'm wrong, i don't mind admitting it

    I've just checked, and they remain on L or S with'no sub' set . I'm not trying to say that's the case with all av amps,i can only comment on mine



    Ok, sorry – someone mentioned an AVR and I thought we were talking DENON.

    It seems a bit strange to me to be able to set "SMALL" FL& FR and "NO SUB" at the same time; as Reiner stated above: where do the bass signals go?

    Mark
     
  16. Nic Rhodes

    Nic Rhodes
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    I think it goes to the L and R! Whether you have set them to large or small. Good eh!;)
     
  17. Reiner

    Reiner
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    That's how it should be ... :)
     
  18. Guest

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    Works for me:)
     

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