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LFE mix on Sony 930

Discussion in 'AV Receivers & Amplifiers' started by Ged, Jul 17, 2002.

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  1. Ged

    Ged
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    My Sony 930 has two LFE mix settings, one being for DTS. Can anyone explain what this is for and how it should be set i.e. the range is OFF, -20 to 0 and to + 10 for DTS. I use KEF 35.2 fronts, 95c centre and Paradigm 8 subwoofer.
    Thanks Ged.
     
  2. bh

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    DTS mixes are known to contain deferences in bass and volume levels which sometimes mean that the levels set for a DD signal will not be suitable for a DTS input. Your amp simply allows you to have two settings (one DD default and a DTS default).

    The following website has a good explanation of sub calibration:

    http://www.surroundassociates.com/spkrcal.html



    Good luck,

    BH
     
  3. Ged

    Ged
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    Thanks BH, all that may take some time to breakdown.So it does look like an "advanced" setting and not just an up or down bass switch with a half way setting. Thanks Ged.
     
  4. Jase

    Jase
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  5. Ged

    Ged
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    Thanks Jase, I now see why it has such variable settings.Without the tools to measure, except my ears, if the big bangs are too overblown then I should be turning down the LFE mix and not the sub db setting?
     
  6. Jase

    Jase
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    Ged

    I would leave the LFE setting alone to be honest, if the bass is too much then adjust it via the sub db setting.
     
  7. Ged

    Ged
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    Thanks, I will try to recall the default setting.
     
  8. Jase

    Jase
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    Depends on the amp but normally its 0db for Dolby and 0db for DTS. Its the adjustment that seems to vary, my Denon you can lower the LFE for both Dolby & DTS but not increase it, but on a previous Yamaha you could increase the DTS LFE up to +10db. It depends how the manufacturer implements it.
     
  9. MikeK

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    The LFE Mix setting isn't for DTS alone - it's for both DD and DTS.

    LFE MIX - controls the level of the discrete LFE (.1) channel in 5.1 mixes (both DD and DTS) - it's default is 0, which is max level.
    It can only be turned down.

    SUB LEVEL - controls the level of the bass which has been cut from any channels set to SMALL, and rerouted to the subwoofer.
    Also controls the level of the subwoofer when listening to analogue sources in AFD mode. Default is 0, but adjustment is either up or down.

    They are used in conjunction to ensure that the discrete LFE track is played back at the same level as any bass from the redirection circuitry.
     
  10. Ged

    Ged
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    Thanks Mikek, so it does seem to afect the deep bass effect from DVD, which may be too much when the special(LFE) .1 effect kicks in, thus explaining the minus settings.
    Thanks Ged.
     

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