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Thread: Problem with Rogers jr149 speakers

  1. #1
    Join Date: Nov 2016

    Location: London

    Posts: 16
    I'm Alex.

    Default Problem with Rogers jr149 speakers

    This problem was there when I first got them. The right speaker doesn't seem to have any bass compared to the other. I looked inside and both the tags that were riveted to the speaker frame had snapped. But the connection point was still intact. I couldn't find a replacement tag so I glued the tags back onto the frame with the spacer and tried it. It was still the same. Could it just need replacing or is there something that needs fixing.
    Alex

  2. #2
    Join Date: Apr 2012

    Location: N E Kent

    Posts: 51,624
    I'm Geoff.

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    Measure the coil resistance with a meter. They should measure around 5 ohms. If one is significantly less, it's a dud. Or swap the bass units over and if the problem moves to the other speaker, same thing applies, dud unit. If the problem stays in the original speaker after moving the bass units, it's likely a crossover or connection/joint issue.
    It is impossible for anything digital to sound analogue, because it isn't analogue!

  3. #3
    Join Date: Nov 2016

    Location: London

    Posts: 16
    I'm Alex.

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    When I took the speaker off it had a label with 8 ohms. When I measured the resistance it came up with 9 ohms.

  4. #4
    Join Date: Apr 2012

    Location: N E Kent

    Posts: 51,624
    I'm Geoff.

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    Ah. It's possible Rogers used the 15 ohm specified LS3/5a version of the B110 in those, in which case that figure would be about right. Do both measure the same?
    It is impossible for anything digital to sound analogue, because it isn't analogue!

  5. #5
    Join Date: Nov 2016

    Location: London

    Posts: 16
    I'm Alex.

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    Yes they both measure the same. I swapped the speakers over and its the same one that doesn't work. What would you recommend, just get new ones? If so where would be the best place to get them.

  6. #6
    Join Date: Apr 2012

    Location: N E Kent

    Posts: 51,624
    I'm Geoff.

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    Sounds like you have a knackered driver. They are pretty scarce, but you may get lucky on ebay. It has to be the correct Rogers item though. You could put a 'wanted' ad in the Private Exhibitions section here. Another possibilty is to speak to Falcon Electronics, who market alternative replacement drivers for the LS3/5a speaker. That may entail crossover mods though.
    It is impossible for anything digital to sound analogue, because it isn't analogue!

  7. #7
    Join Date: Sep 2013

    Location: North Island New Zealand

    Posts: 1,757
    I'm Chris.

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    Quote Originally Posted by Komistar View Post
    Yes they both measure the same. I swapped the speakers over and its the same one that doesn't work. What would you recommend, just get new ones? If so where would be the best place to get them.
    If they measure the same the drivers are OK, however it is where the tags for external connection attach that the error of one not working is.
    Carefully examine how your multimeter was able to measure resistance, and ask yourself why and how is the external connection not doing the same.

    If you have a magnifying glass you might be able to see exactly where the problem is. You might have to reattach the spade lug. Other than
    that there is disconnection between the driver and the crossover board. Undoing the bottom plate, you will either have a Type 1 or Type 2
    crossover. post an image or two which will help us help you. There is likely a broken wire between the crossover and the driver or its the lug
    on the driver itself.

  8. #8
    Join Date: Nov 2016

    Location: London

    Posts: 16
    I'm Alex.

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    The wire coming out the speaker looks like it's attached properly. The only visible problem on it is the connector that isn't held on with the rivet. The crossover board seems fine.

  9. #9
    Join Date: Nov 2016

    Location: London

    Posts: 16
    I'm Alex.

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  10. #10
    Join Date: Nov 2016

    Location: London

    Posts: 16
    I'm Alex.

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    [IMG][/IMG]

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