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Light Harmonic upgraded speakers

Discussion in 'Model S' started by sidmini, Jul 18, 2018.

  1. tcoombes

    tcoombes Supporting Member

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    Too bad. I worked with them to tune their amp to work in my MCU2 Model S and it works great. I am surprised they made this decision.
     
  2. Trebek1762

    Trebek1762 Let's play jeopardy

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    i've read reports about popping noises on MCU2. Is that what you helped tune or fix?
     
  3. tcoombes

    tcoombes Supporting Member

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    Yes, they removed buzzing and popping noises both on startup and during operation. Adjustments were made internal to the amp. Too much adjustment one way led to popping on startup and too much the other way sounded like background noise or buzzing. They found the right mix after a few iterations and it has been perfect ever since.
     
  4. derichio02

    derichio02 Member

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    Wow. Yes good info. I guess I’m going to have to wire up a standard amplifier
     
  5. tcoombes

    tcoombes Supporting Member

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    There was some discussion a while back about someone possibly creating a wiring harness interface that would plug into the premium amp harness. That would be very useful if trying to integrate with a different class D, 5 channel amp without splicing into the existing wires. Has anyone heard anything more about this? I created the attached diagram when I was working on my stereo project and it could be useful for helping to create a connector.
     

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  6. jzafra88

    jzafra88 Member

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    Got my hands on the Amp for my 2015

    I replaced the fuse F18 with the 35amp supplied

    Unplugged the stock amp and plugged in the LH Amp

    Sounds coming out the speaker but nothing out the sub

    Any ideas?
     
  7. verdee

    verdee Member

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    did you reboot?
     
  8. verdee

    verdee Member

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    I always though this would be a good idea, but is beyond my skill/time level. The actual part for the connector is a TE 1534046-1. There are sites that will make a bunch of the. Early cars without UHFS still had the amp connector so you could wire a sub off that using the above part.
     
  9. jzafra88

    jzafra88 Member

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    I rebooted the MCU and didn't help

    Did yours just fire up right away?
     
  10. rooter

    rooter Member

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    Polk Audio drivers is the only way to go, if you are concerned about -natural- sound.
     
  11. tcoombes

    tcoombes Supporting Member

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    I think this would be a useful adapter and would work on both MCU1 and MCU2 versions because the only wiring differences between the two are the color of the wires. A plug and play adapter for the existing harness could provide stub wiring for connecting to a variety of amp and speaker combinations. Even if you replaced speaker wiring and used a different power cable, the line-in wiring and other interface wiring could be accessed without having to do any splicing into the existing wires. I would use this adapter even if going with a completely customized configuration. It would be nice if it had a passthrough capability to still be able to plug directly into a UHFS or LH amp, but allowed for bypass of selected channels (subwoofer, for example) and interface with a separate third amp. Someone could also get close to an LH premium amp replacement configuration, as well, as long as the power consumption did not exceed the capability and fuse capacity of the existing circuit (maybe 600 watts or so, if I did my math correctly). Nice idea, I would purchase one if someone were to produce a batch of these adapters.
     
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  12. battleroyale

    battleroyale Member

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    And my LH amp just called it quits. Waiting to hear back from them on fix or replacement. Fingers crossed.
     
  13. verdee

    verdee Member

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    prepare to wait awhile. They have had my amp since late January awaiting a replacement
     
  14. battleroyale

    battleroyale Member

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    Just got my updated replacement amp. Took a while as they reworked the board to fix the issues it had and revised it to work with the newer MCU's. Definitely has more venting than the previous unit did.




    Screen Shot 2021-02-19 at 12.03.34 PM.png Screen Shot 2021-02-19 at 12.03.15 PM.png
     
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  15. gbailey

    gbailey Member

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    Do you know if they’re planning to sell new units separately? Can’t see them on their website.
     
  16. battleroyale

    battleroyale Member

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    From what I was told. They are planning on re releasing the updated amp soon. Seems like they are getting replacement amps out to those that were in for warranty work first.
     
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  17. HankLloydRight

    HankLloydRight No Roads

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    Will there be a 'trade-in' option for existing owners to get the MCU2 upgrade fix?

    Although I hate the idea of getting up in there to swap out the amp again. Was not a fun project.
     
  18. dark cloud

    dark cloud Active Member

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    I was just clicking around regarding LH Labs, and found this. Wow, just wow.
     
  19. rooter

    rooter Member

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    #59 rooter, Feb 23, 2021
    Last edited: Feb 23, 2021
    Meaning, the sound what usually goes in yer ears...
     
  20. verdee

    verdee Member

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    I installed my updated amp yesterday. Works the way it should. No popping or static. Bass bumps now. Too bad I will only have my lease another 4 months before I get a new car. I'm happy that LH pulled through and fixed the amps
     
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