Sub intermittent

Discussion in 'Subwoofers' started by Neal broadhurst, Feb 11, 2014.

  1. Neal broadhurst

    Neal broadhurst
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    Hi all, have just installed a new yamaha receiver but for some reason the sub only come on after a the system has been running for a while ? Never had this problem when it was connected to my marantz receiver, the speakers are kef eggs with a kef sub. It's set up for small speakers and the bass crossover is set at 100hz but have tried this between 60hz and 120hz but no luck. The light on the sub stays red until it decides to play ball and them turns green. Once it's on it stays on and world perfectly it's just getting it to come on on the first place ! I thought it should switch on when the receiver is turned on ?? Hope someone can help

    Neal
     
  2. Member 639844

    Member 639844
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    It sounds like a signal sensing issue. Try lowering the gain on the subwoofer itself, then increasing the subwoofer trim level on the AVR. If the output on the AVR is low then it might not be enough to get the subwoofer to come out of its sleep state, and making the adjustments to the setup Ive posted should fix the issue.
     
  3. Neal broadhurst

    Neal broadhurst
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    Have given this a go but it's still the same?? Do you think the receiver could be faulty ?
     
  4. Rock Danger

    Rock Danger
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    Neal, turn the volume right up on the sub can you hear any hiss?

    Widen your hand out and gently move the cone in and out, does it make a scratching sound? The AVR is sending a signal and waking the sub up, but you've got no noise. Most likely candidate is a dead driver or depending on the design an internal protection fuse blown - tho most of the time when the internal fuse goes, you tend to have no power.

    Any kind of pre amp like an ipod can be used to rule out the AVR being the problem.
     
  5. Neal broadhurst

    Neal broadhurst
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    Thanks for your help bit it looks like I've found the problem, it seems my cable is faulty. On the off chance I tried a short RCA cable I've got spare and bang it switched on ( green light ) straight away. I had a fiddle with the old wire and it seems to be broken on the end. It flicked on and off when I squeezed the wire. It's a QED so I unscrewed the end. I cut of the heat shrink but it looks ok so I think it's had it. It's about 12 years old so I can't complain , a new wire it is then !

    Thanks again it's good to know there people here with experience ready to help.

    Neal
     

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