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'burping' subwoofer

Discussion in 'Subwoofers' started by mouse100, Oct 16, 2003.

  1. mouse100

    mouse100
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    Hi all,

    I've just bought and installed an Infinity oreus sub/sat system, which sounds great.

    My problem is that when watching TV or any soundtrack with intermittent action/music, the sub keeps switching on and off automatically. It goes to sleep if there's no LFE signal for 1.5 minutes and then wakes up again when some bass is present.

    Unfortunately the switch off gives an audible noise, which my girlfreind refers to as a 'burp'. Also, when it wakes up, there' a second or two delay, which is annoying

    Saving energy is great, but it seems to diminish the enjoyment a bit.

    Is this normal?

    Is there a cure?

    I tried playing around with the LFE output level and crossover point on my amp, but it's always the same.

    My dealer said it was normal and i would get used to it.

    What do you think?

    Martin
     
  2. Nobber22

    Nobber22
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    A 90 sec standby sounds too short. Lots of films have more than that between low-end moments! Either it's faulty or a bad design. I'd push your dealer/Infinity for a full explanation and perhaps swop it for another brand if you get no joy?
     
  3. sdh500

    sdh500
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    Most subs have a power save switch at the back. If you have one, switch it from Auto to Off.
     
  4. Andywilliams

    Andywilliams
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    Hi mouse
    If the sub has both left and right inputs get a splitter cable (about 4 quid from maplins) put this on the end of your sub cable and then connect left and right inputs on the sub ,this should increase sensitivity no more sub switching off.
    Cheers Gonzo.:)
     
  5. magking

    magking
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    Put the subwoofer output on the amplifier to max and adjust volume on the subwoofer.
     
  6. Andywilliams

    Andywilliams
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    Hi magking
    The info i got from Tom v at svs states that it is best to set sub levels on the amp to around -5 decibels this gives a much cleaner signal then adjust subs gain to match spl or by ear level.When the amps sub output is on max setting the signal from the amp to the sub can become distorted .
    Cheers Gonzo.
     
  7. magking

    magking
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    Depends on the amp I guess.
    But it will help on the burping thats for shure, and I see no harm in trying.
     
  8. mouse100

    mouse100
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    Thanks for all your suggestions guys.

    I'm going to try playing around with the amp output level to see if it makes a difference.

    Also, someone told me that i may have the sub volume level level set too high and that's why i can hear it switching on and off.

    Martin
     
  9. Andywilliams

    Andywilliams
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    Hi Mouse
    The y- splitter will cure the problem if you have left and right inputs, Maplins will deliver most times next day for in stock items.
    My brother had the same problem with his sub y- splitter cured it.
    Cheers Gonzo.
     
  10. mouse100

    mouse100
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    Hi,

    I've tried fiddling with the settings and nothing changed.

    I'm going to go for the Y splitter next...

    Any other ideas out there?

    Cheers

    Martin
     
  11. avanzato

    avanzato
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    When your dealer say it's 'normal' I would say it's unacceptable. The fact you've posted here says that.

    If you want to try something else. Have you connected it up by the high level inputs and set the mains to large? If that doesn't keep the sub awake then there is a problem and get it replaced.
     
  12. mouse100

    mouse100
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    I'm going to sort it out with the dealer tomorrow.

    I'll keep you posted.

    Martin
     
  13. hornydragon

    hornydragon
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    Martin i personally have not come across this with the Oreus Sub but LMK how you get on (who is your local dealer?)
     
  14. mouse100

    mouse100
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    My dealer has advised me to try the Left-right y-splitter route, as per Gonzo's post.

    I hadn't got around to doing this yet as Maplin's are out of stock. They said that it would work just as well without the splitter.

    They got this direct from the technical team at the importer. It only took 5 mins to get the answer back, so it can't be a new problem...

    They confirmed that the time delay before switch off is longer and the sensitivity is higher.

    I'll let you know how it goes. Cheers for all your help,

    Martin
     
  15. Mark Ward

    Mark Ward
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    Just curious..

    What do you have your amp's crossover set to? At 80hz the sub should generally be given something to do most of the time and shouldn't be so tempted to go to sleep.

    I've had some M&K75's in the past which were fine during pro-longed quiet periods but "farted" when the power was physically switched off. It was comical but I don't think I'd have appreciated it mid movie.

    Mark.
     
  16. mouse100

    mouse100
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    Hi,

    I've got the amp crossover set to 80Hz.

    Anyway, it's all irrelevent now because my dealer came up trumps and upgraded me to a REL Q150E MkII for an extra £200.

    I'm really pleased 'cos this sub is much, much better in every way than the Infinity one. It's quite subtle actually, not so 'in your face' but the bass goes much lower.

    I'm using the REL recommended method of connection with both high level input from the front speakers and the low level input form the LFE output. This seems to work very well indeed with both music and movies. The downside is that the setup is a bit more complicated.

    Does anyone else have any experience of this setup?

    Thanks for all your help guys,

    martin
     

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