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Thread: How do I find Unity Gain?
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October 21, 2020, 12:04 PM #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.
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October 21, 2020, 12:21 PM #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/Audioquest Diamond USB, Esoteric N05xd
Mark Levinson #526, 534 & JBL 4367's
Clearaudio Performance DC w/Maestro cart
Clarus Concerto & their Crimson cables
HT: Marantz AV8003, Linn 5125, JBL SAM3ha, Revel s30,
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October 21, 2020, 01:52 PM #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
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October 21, 2020, 08:34 PM #4
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Aurender ACS10 w/Audioquest Diamond USB, Esoteric N05xd
Mark Levinson #526, 534 & JBL 4367's
Clearaudio Performance DC w/Maestro cart
Clarus Concerto & their Crimson cables
HT: Marantz AV8003, Linn 5125, JBL SAM3ha, Revel s30,
SVS PC13 Ultra
Transparent, Analysis Plus & Tributaries. PS Audio filtering
Sony XBR-75X940D & BDP
Parasound P6, MBL 8006b, Artisan speakers/subwoofer
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October 21, 2020, 09:28 PM #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
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October 22, 2020, 12:18 AM #6
Re: How do I find Unity Gain?
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
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October 22, 2020, 09:45 AM #7
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Re: How do I find Unity Gain?
Thanks, Peter. I’ll 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.
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October 22, 2020, 01:20 PM #8
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Re: How do I find Unity Gain?
Aurender ACS10 w/Audioquest Diamond USB, Esoteric N05xd
Mark Levinson #526, 534 & JBL 4367's
Clearaudio Performance DC w/Maestro cart
Clarus Concerto & their Crimson cables
HT: Marantz AV8003, Linn 5125, JBL SAM3ha, Revel s30,
SVS PC13 Ultra
Transparent, Analysis Plus & Tributaries. PS Audio filtering
Sony XBR-75X940D & BDP
Parasound P6, MBL 8006b, Artisan speakers/subwoofer
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October 22, 2020, 10:06 PM #9
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October 24, 2020, 09:32 PM #10
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December 6, 2020, 01:12 PM #11
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Re: How do I find Unity Gain?
JCS 123, just curious what the results from your 3 options were. Which option sounded best to you? Anyone else using a preamp try the different options?
Last edited by Audiofan57; December 6, 2020 at 01:23 PM. Reason: Addition
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September 20, 2022, 08:14 AM #12
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Re: How do I find Unity Gain?
Audiofan, my apologies for the late reply.
Due to various issues, I still haven't gotten around to getting that meter to test things out.
Thank you (and everyone else who responded) for the advice!
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The AudioShark forum was created for sharing the passion of high-end Audio. We have Audiophiles from all over the world participating and sharing their knowledge. From novice to experts, you will find a friendly environment for discussing about High End Audio, Stereo System, Home Theater System, Home Stereo System, Home Theater Installation, Amplifiers, Speakers, Subwoofers, Integrated System, Acoustic treatments & Digital Room Corrections and many more.
At AudioShark, we also have incorporated an exciting Marketplace where members can peruse terrific buys on used gear, as well as meet dealers and discuss the purchase of new gear.
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