How to check for proper function L800

Options
warlocks1
warlocks1 Posts: 1,284
in Speakers
I am picking up a set of L800 and want to verify they work properly.

Can I verify SDA effect if I connect the SDA interconnect cable to both speakers and then disconnect the amp connection connection to one speaker? Will the SDA speaker driver still play on the disconnected speaker? If so, then I can do the same with the other speaker?

Thanks
· Share on Facebook

Answers

  • F1nut
    F1nut Posts: 52,406
    edited December 2024
    Options
    The way the SDA operates in the L800 is very different than the originals. Each L800 contains a stereo crossover and an SDA crossover, they are sort of mirror images of each other.

    That said, I have no idea what would happen if you disconnect one speaker.

    The L800 crossover, one side stereo and the other SDA.
    p85o0v8j3d67.jpg
    · Share on Facebook
  • warlocks1
    warlocks1 Posts: 1,284
    Options
    Too complicated for me

    Would it be safe to say if all the drivers are moving and sound out of both tweeters, they are probably good?
    · Share on Facebook
  • Emlyn
    Emlyn Posts: 4,905
    Options
    There is some guidance from Polk regarding checking for absolute phase, which seems to be related to SDA functioning and setup but requires a balance control. I must admit it's a little hard to follow, especially when it says the true center for an amplifier may change at different volume levels:

    https://www.polkaudio.com/on/demandware.static/-/Library-Sites-polk_northamerica_shared/default/dwb6ce935d/downloads/legend-series-setup-en.pdf
    · Share on Facebook
  • VR3
    VR3 Posts: 29,752
    Options
    There's a track on tidal called stereo left right, I use it to test sda functionality when I do my mods As it is a dude talking saying left right, nice and simple
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
    · Share on Facebook
  • warlocks1
    warlocks1 Posts: 1,284
    Options
    Great. Thanks Trey
    · Share on Facebook
  • Unknown
    Unknown
    Options
    This content has been removed.
  • boston1450
    boston1450 Posts: 7,759
    Options
    VR3 wrote: »
    There's a track on tidal called stereo left right, I use it to test sda functionality when I do my mods As it is a dude talking saying left right, nice and simple

    I use this disc here just for that. I picked it up in a DVD/CD pkg deal years ago. It's a cd-disc cleaner w/brushes as well.YouTube may have it as well. l0ahf6agxfcb.jpg
    Randy-Maine
    2ch-RTA15tl crossover upgrade
    by David WMG
    Yamaha cr1000 cr2040
    HT-Yamaha Parasound Acurus
    MIT BJC Cs1000p Polk Rotation
    · Share on Facebook
  • warlocks1
    warlocks1 Posts: 1,284
    Options
    Sorry to be a pain on this, but it's a decent drive and I want to ensure they work properly so I don't have to bring them back.

    I have to bring my own equipment to test. I am bring an integrated amp with balance controls. If I turn the balance to left only, should I hear SDA speakers from the right speaker?

    I believe that works with the old SDA's

    Thanks
    · Share on Facebook
  • Unknown
    Unknown
    Options
    This content has been removed.
  • Emlyn
    Emlyn Posts: 4,905
    Options
    Yes. Can also test with a home theater receiver's speaker level test tones. The test tone for the right speaker will play in the upper portion of the inside array in the right speaker and the outside array of the left speaker. For the left speaker it's inside array for the left speaker and outside array for the right speaker. It's clearly audible in both speakers.
    · Share on Facebook
  • warlocks1
    warlocks1 Posts: 1,284
    Options
    Thx
    I would prefer not having to disconnect one of my receivers to do test tones, but will if the balance trick doesn’t work on the integrated.

    Sorry that I just sold my Marantz receiver. Replaced it with an Arcam

    I am picking up on Sunday

    thanks

    · Share on Facebook
  • Unknown
    Unknown
    Options
    This content has been removed.
  • warlocks1
    warlocks1 Posts: 1,284
    Options
    Thanks!!

    One you state the inboard drivers(non SDA) fade out do the outboard drivers (SDA) still produce sound?
    · Share on Facebook
  • Unknown
    Unknown
    Options
    This content has been removed.
  • warlocks1
    warlocks1 Posts: 1,284
    Options
    Perfect.

    Thanks everyone.

    Hopefully, pics to show this
    Weekend
    · Share on Facebook