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  1. #1
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    How do I find Unity Gain?

    For using Leedh volume control with a preamp, what is the best way to find out what my unity gain is? I have a hard enough time even understanding what unity gain is, let alone determining what is is in my setup.

    My goal is to compare and find out what sounds better in my system:

    - Lumin T2 directly to amps using Leedh.

    - What I currently have: T2 to an active preamp to the amps, no Leedh processing.

    - Same as above, but using Leedh processing for volume control.

    Thanks in advance for any help.

  2. #2
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    Re: How do I find Unity Gain?

    what is leedh?

    Unity Gain is when the input and output voltage is the same between two devices. Used a lot for home theater bypass. Although to allow a signal to pass you wouldn't necessarily need absolute unity gain. Unless maybe for some reason it was critical for the voltages to match.

    As an example, I used a regular input of a preamp as a bypass before, I just had to select a certain point on volume and be sure I was at that point each time I used the bypass as to not mess up the balance I initially set.
    Aurender ACS10 w/AQ Diamond,
    Mark Levinson #526, Coda Continuum 8 , JBL 4367's
    Clearaudio Performance DC w/Maestro cart
    All Clarus Crimson cabling, AC to binding post. Surgex
    HT: Marantz AV8003, Linn 5125, JBL SAM3ha, Revel s30,
    SVS PC13 Ultra
    Transparent, Analysis Plus & Tributaries. PS Audio filtering
    Sony XBR-75X940D & BDP
    Parasound P5, Coda CSX, Artisan speakers

  3. #3
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    Re: How do I find Unity Gain?

    On my Classe Sigma, I can set it to pass through, which puts volume at 0.0 and turns off the volume control of my Classe. I then adjust volume on my iPad/iPhone using Leedh. I have always wondered if I am doing the same thing if I manually set the volume on the Classe to 0.0 and not having the Classe set to pass through.
    Last edited by Audiofan57; October 21, 2020 at 01:53 PM. Reason: Typo

  4. #4
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    Re: How do I find Unity Gain?

    It would be the same.

    Quote Originally Posted by Audiofan57 View Post
    On my Classe Sigma, I can set it to pass through, which puts volume at 0.0 and turns off the volume control of my Classe. I then adjust volume on my iPad/iPhone using Leedh. I have always wondered if I am doing the same thing if I manually set the volume on the Classe to 0.0 and not having the Classe set to pass through.
    Aurender ACS10 w/AQ Diamond,
    Mark Levinson #526, Coda Continuum 8 , JBL 4367's
    Clearaudio Performance DC w/Maestro cart
    All Clarus Crimson cabling, AC to binding post. Surgex
    HT: Marantz AV8003, Linn 5125, JBL SAM3ha, Revel s30,
    SVS PC13 Ultra
    Transparent, Analysis Plus & Tributaries. PS Audio filtering
    Sony XBR-75X940D & BDP
    Parasound P5, Coda CSX, Artisan speakers

  5. #5
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    Re: How do I find Unity Gain?

    Thank you Mr. Peabody. It is much easier for me to run Leeds h this way as I have to get up and use the display on the unit to set it to pass-through. Then I have to remember to turn pass through off when I switch to a different source.
    Last edited by Audiofan57; October 21, 2020 at 09:28 PM. Reason: Typo

  6. #6
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    Re: How do I find Unity Gain?

    Quote Originally Posted by JCS123 View Post
    My goal is to compare and find out what sounds better in my system:

    - Lumin T2 directly to amps using Leedh.

    - What I currently have: T2 to an active preamp to the amps, no Leedh processing.

    - Same as above, but using Leedh processing for volume control.

    Thanks in advance for any help.
    If you don't have HT bypass in your preamp, simply try lowering the Leedh volume, then turning up the preamp volume.

    Use a free sound level meter app on the smartphone to measure the sound level, in order to compare SQ at the closest possible volume levels in the various setup.
    Peter Lie
    LUMIN Firmware Lead

  7. #7
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    Re: How do I find Unity Gain?

    Quote Originally Posted by wklie View Post
    If you don't have HT bypass in your preamp, simply try lowering the Leedh volume, then turning up the preamp volume.

    Use a free sound level meter app on the smartphone to measure the sound level, in order to compare SQ at the closest possible volume levels in the various setup.
    Thanks, Peter. Iíll do a little experimenting with the sound level meter.

    Also, thanks to Mr. Peabody. This is something that I was hoping to find some kind of formula for, but it is becoming apparent that I will just have to try a few things out and find out what sounds best.

  8. #8
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    Re: How do I find Unity Gain?

    If unity gain is -0- on your volume when bypass is on, then if you set the volume to -0- on any input the result is the same.

    Quote Originally Posted by JCS123 View Post
    Thanks, Peter. Iíll do a little experimenting with the sound level meter.

    Also, thanks to Mr. Peabody. This is something that I was hoping to find some kind of formula for, but it is becoming apparent that I will just have to try a few things out and find out what sounds best.
    Aurender ACS10 w/AQ Diamond,
    Mark Levinson #526, Coda Continuum 8 , JBL 4367's
    Clearaudio Performance DC w/Maestro cart
    All Clarus Crimson cabling, AC to binding post. Surgex
    HT: Marantz AV8003, Linn 5125, JBL SAM3ha, Revel s30,
    SVS PC13 Ultra
    Transparent, Analysis Plus & Tributaries. PS Audio filtering
    Sony XBR-75X940D & BDP
    Parasound P5, Coda CSX, Artisan speakers

  9. #9
    Senior Member
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    Hong Kong
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    Re: How do I find Unity Gain?

    Quote Originally Posted by Mr Peabody View Post
    what is leedh?
    It is the latest digital volume technology incorporated into Lumin products as a free upgrade.
    Peter Lie
    LUMIN Firmware Lead

  10. #10

    Re: How do I find Unity Gain?

    Unity gain = 1

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How do I find Unity Gain?

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