# Qu6 Channel 12 does not output to Mixes 1-6 **URL:** \ **Category:** Qu Troubleshooting\ **Created:** [11 July 2026 22:24 UTC](https://forums.allen-heath.com/t/qu6-channel-12-does-not-output-to-mixes-1-6/32500 "2026-07-11T22:24:24Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![John\_Saylor](https://sea2.discourse-cdn.com/flex002/user_avatar/forums.allen-heath.com/john_saylor/32/8869_2.png) [@John\_Saylor](https://forums.allen-heath.com/u/John_Saylor)\ **Post date:** [11 July 2026 22:24 UTC](https://forums.allen-heath.com/t/qu6-channel-12-does-not-output-to-mixes-1-6/32500/1 "2026-07-11T22:24:24Z")
I found a this odd behavior recently. On channel 12, audio signal routes properly to Mix Out 15/16 ( the main mix), but does not pass audio to mixes 1-6. I have made sure Mixes 1-6 are set to pre-fader, and the master is up for each. I have also updated to the latest firmware, 1.1.3, but the issue persists. It only appears to be a problem on channel 12. All of the other channels respond normally. ---
**Author:** ![Kate](https://sea2.discourse-cdn.com/flex002/user_avatar/forums.allen-heath.com/kate/32/7659_2.png) [@Kate](https://forums.allen-heath.com/u/Kate)\ **Post date:** [12 July 2026 01:21 UTC](https://forums.allen-heath.com/t/qu6-channel-12-does-not-output-to-mixes-1-6/32500/2 "2026-07-12T01:21:23Z")
It’s always possible there’s a bug somewhere or something wrong at a very low level – but I find it suspicious that it doesn’t work with the mono mixes but it does with the stereo mixes. If you sent it to mix 7 and then toggle the mix configuration from stereo to mono, do you observe the same problem but only when in mono mode? If so, I’d suggest that you have a stereo signal with identical contents on L and R with opposite polarities that is being summed to a null mono. How exactly that’s happening would be a lot less clear. Something inserted on that input channel? 100% speculation of course, but at least it’s one diagnostic step you could try that might tell you something more than you know now. ---
**Author:** ![SQuser](https://sea2.discourse-cdn.com/flex002/user_avatar/forums.allen-heath.com/squser/32/1200_2.png) [@SQuser](https://forums.allen-heath.com/u/SQuser)\ **Post date:** [12 July 2026 08:23 UTC](https://forums.allen-heath.com/t/qu6-channel-12-does-not-output-to-mixes-1-6/32500/3 "2026-07-12T08:23:58Z")
> [@John\_Saylor](#): > > On channel 12, audio signal routes properly to Mix Out 15/16 ( the main mix), but does not pass audio to mixes 1-6. Please also check whether your channel 12 is actually assigned to the mixes 1–6. There are various ways to do this - or, for that matter, to accidentally fail to do it. ![qur1](https://us1.discourse-cdn.com/flex002/uploads/allenheathdigitalcommunity/original/2X/f/f80ee095445b5e2bb0c04e592990bc2a4b5d1034.jpeg) ---
**Author:** ![John\_Saylor](https://sea2.discourse-cdn.com/flex002/user_avatar/forums.allen-heath.com/john_saylor/32/8869_2.png) [@John\_Saylor](https://forums.allen-heath.com/u/John_Saylor)\ **Post date:** [12 July 2026 19:51 UTC](https://forums.allen-heath.com/t/qu6-channel-12-does-not-output-to-mixes-1-6/32500/4 "2026-07-12T19:51:02Z")
This was it. Channel 12 had mixes 1-8 off. Thank you. ---
**Author:** ![27Hz](https://avatars.discourse-cdn.com/v4/letter/2/6bbea6/32.png) [@27Hz](https://forums.allen-heath.com/u/27Hz)\ **Post date:** [22 July 2026 16:38 UTC](https://forums.allen-heath.com/t/qu6-channel-12-does-not-output-to-mixes-1-6/32500/5 "2026-07-22T16:38:18Z")
I’ve had that too and all sorts of other odd things, mainly because this super important summary page is a 4th sub menu page of some other page. It should be a main menu option. I haven’t needed DCAs or changing direct out assignments but those are all listed first for some reason. The 3rd tab/page over called “Main” has almost nothing on it. and the 4th page called MIX is the one we actually need which should be in front or listed first. ---
**Author:** ![SQuser](https://sea2.discourse-cdn.com/flex002/user_avatar/forums.allen-heath.com/squser/32/1200_2.png) [@SQuser](https://forums.allen-heath.com/u/SQuser)\ **Post date:** [22 July 2026 19:59 UTC](https://forums.allen-heath.com/t/qu6-channel-12-does-not-output-to-mixes-1-6/32500/6 "2026-07-22T19:59:52Z")
> [@27Hz](#): > > the 4th page called MIX is the one we actually need Just in case you aren’t already aware: All assignments (also Pre/Post settings) can generally be handled much faster and more clearly using the “Surface routing shortcuts” - without needing menus at all. ![quass](https://us1.discourse-cdn.com/flex002/uploads/allenheathdigitalcommunity/original/2X/6/6c75218ad28c11a2becca0857f8efd2f1432e361.jpeg)