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Underwhelming output from sub

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  • billfitzmaurice
    commented on 's reply
    The sub signal source can't be both the LFE/Sub output of the AVR and the soundbar. It's got to be one or the other. There should be no connection between the sound bar and the sub. The AVR should have the ability to set the drive levels to the soundbar and sub independently.

  • Steve Lee
    replied
    Is there some easy way to take an output voltage measurement of the sound-bar output with some fixed frequency sent to it?

    Leave a comment:


  • grampi50
    replied
    Originally posted by djg View Post
    Are you aware of the high/low input level switch on the plate amp?
    Yes I am, and it's set correctly.

    Leave a comment:


  • grampi50
    replied
    Originally posted by Chris Roemer View Post
    Yup. I would not drive your higher-than-mid-end setup w/the output from a cheap soundbar.
    Unfortunately, that's my only input source...

    Leave a comment:


  • grampi50
    replied
    Originally posted by billfitzmaurice View Post
    The source should be the LFE/Sub output of your AVR.
    It is.

    Leave a comment:


  • djg
    replied
    Are you aware of the high/low input level switch on the plate amp?

    Leave a comment:


  • Chris Roemer
    replied
    Yup. I would not drive your higher-than-mid-end setup w/the output from a cheap soundbar.

    Leave a comment:


  • billfitzmaurice
    replied
    The source should be the LFE/Sub output of your AVR.

    Leave a comment:


  • grampi50
    started a topic Underwhelming output from sub

    Underwhelming output from sub

    I completed the sub build project of a sealed enclosure with an HO 12" Dayton sub. The amp is the SPA500DSP. The first thing I noticed after connecting the sub is that I had to turn the volume on the amp all the way up to get any decent amount of output. This was a bit puzzling to me because my previous sub (using a cheap, 15" MTX car audio sub and a PE 250 watt plate amp in a sealed enclosure) was never turned up above half volume, and it played a lot louder than this one does. The only thing I can figure is the preamp out signal I'm using for the amp's input (which is coming from a sound bar) has a low voltage. With the amp's volume turned all the way up, and the sub out volume control turned almost all the way up, I'm getting okay output when listening to music, and a little better output when watching movies. I feel like I have the best sounding settings on the DSP parameters, I'm just not that impressed with the output. The sub doesn't distort no matter where I have the controls set, so I'm wondering if the input signal needs to be a higher level. Is there any way to boost the preamp signal? Is this not the the fix? Maybe I'm just expecting too much from a 12? I would've thought this 12 (which is a much better sub than my previous MTX), with double the power I had on my MTX would be at least as loud. Any ideas?
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