# Left channel of a stereo pair has lost ~60db of gain
**URL:** https://forums.allen-heath.com/t/left-channel-of-a-stereo-pair-has-lost-60db-of-gain/32988
**Category:** Qu Troubleshooting
**Tags:** qu-32
**Created:** [25 September 2026 03:12 UTC](https://forums.allen-heath.com/t/left-channel-of-a-stereo-pair-has-lost-60db-of-gain/32988 "2026-09-25T03:12:19Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@bethelpenticton](https://forums.allen-heath.com/u/bethelpenticton)
#### Post date: [25 September 2026 03:12 UTC](https://forums.allen-heath.com/t/left-channel-of-a-stereo-pair-has-lost-60db-of-gain/32988/1 "2026-09-25T03:12:19Z")
This is the second pair of stereo channels I have doing this.
This one is coming from a keyboard. I have to unpair the gain on these stereo channels because all of a sudden I’ve lost ~60db in the left channel. The gates are still paired so I still have a meter showing in that box, but the input for the left is way way down. Gaining it up to parity with the right channel creates a lot of overhead noise, as you might imagine.
Approx. 10-year old Qu-32. Never serviced. Firmware is up-to-date.
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### Author:  [@giga](https://forums.allen-heath.com/u/giga)
#### Post date: [25 September 2026 06:06 UTC](https://forums.allen-heath.com/t/left-channel-of-a-stereo-pair-has-lost-60db-of-gain/32988/2 "2026-09-25T06:06:39Z")
And you’re absolutely sure it isn’t the cabling, DI or keyboard (pansettings maybe ?)itself ?
Giga