# Connecting QU-5 to QUPAC
**URL:** https://forums.allen-heath.com/t/connecting-qu-5-to-qupac/32195
**Category:** Qu Troubleshooting
**Tags:** qu-pac, qu-5
**Created:** [31 May 2026 15:07 UTC](https://forums.allen-heath.com/t/connecting-qu-5-to-qupac/32195 "2026-05-31T15:07:05Z")
**Posts on this page:** 12
**Page:** 1
### Author:  [@dandrews75](https://forums.allen-heath.com/u/dandrews75)
#### Post date: [31 May 2026 15:07 UTC](https://forums.allen-heath.com/t/connecting-qu-5-to-qupac/32195/1 "2026-05-31T15:07:06Z")
I am trying to connect a new QU-5 mixer to an older QU-Pac to use the latter as a stagebox. Both mixers have had their firmware updated. The QU-Pac is saying Not Connected and the QU-5 is giving an Audio Not Synced error. I have connected an AB168 to both mixers and it works without any problems. Any advice would be appreciated.
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### Author:  [@SQuser](https://forums.allen-heath.com/u/SQuser)
#### Post date: [31 May 2026 18:54 UTC](https://forums.allen-heath.com/t/connecting-qu-5-to-qupac/32195/2 "2026-05-31T18:54:12Z")
> [@dandrews75](#):
>
> the QU-5 is giving an Audio Not Synced error.
Have you configured your QU so that it is synchronized by the SLink?
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### Author:  [@dandrews75](https://forums.allen-heath.com/u/dandrews75)
#### Post date: [31 May 2026 19:06 UTC](https://forums.allen-heath.com/t/connecting-qu-5-to-qupac/32195/3 "2026-05-31T19:06:09Z")
I did. When it is on Internal I have a green tick and when I change to SLink I get an exclamation mark and error.
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### Author:  [@SQuser](https://forums.allen-heath.com/u/SQuser)
#### Post date: [31 May 2026 20:24 UTC](https://forums.allen-heath.com/t/connecting-qu-5-to-qupac/32195/4 "2026-05-31T20:24:34Z")
In that case, I wouldn’t know off the top of my head what you might have done wrong.
You have connected the dSnake port to the SLink port using a cable of at least Cat5e standard, and the corresponding LEDs on both sides have started blinking.?
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### Author:  [@dandrews75](https://forums.allen-heath.com/u/dandrews75)
#### Post date: [31 May 2026 20:44 UTC](https://forums.allen-heath.com/t/connecting-qu-5-to-qupac/32195/5 "2026-05-31T20:44:24Z")
Works fine with the stage box on the same cable.
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### Author:  [@SQuser](https://forums.allen-heath.com/u/SQuser)
#### Post date: [31 May 2026 20:56 UTC](https://forums.allen-heath.com/t/connecting-qu-5-to-qupac/32195/6 "2026-05-31T20:56:52Z")
My question was whether both LEDs blink when you connect both consoles using the (at least) Cat5e cable.
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### Author:  [@dandrews75](https://forums.allen-heath.com/u/dandrews75)
#### Post date: [31 May 2026 21:44 UTC](https://forums.allen-heath.com/t/connecting-qu-5-to-qupac/32195/7 "2026-05-31T21:44:14Z")
Yes they do and using Cat6a cable
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### Author:  [@SQuser](https://forums.allen-heath.com/u/SQuser)
#### Post date: [31 May 2026 23:03 UTC](https://forums.allen-heath.com/t/connecting-qu-5-to-qupac/32195/8 "2026-05-31T23:03:30Z")
That’s quite strange.
But to narrow down the error, the first step I would do is try a different cable anyway; would simply place both consoles side-by-side and use a short network patch cable for the test.
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### Author:  [@dandrews75](https://forums.allen-heath.com/u/dandrews75)
#### Post date: [1 June 2026 00:49 UTC](https://forums.allen-heath.com/t/connecting-qu-5-to-qupac/32195/9 "2026-06-01T00:49:44Z")
Yep, I tried that with a half meter Cat6 cable. Same issue.
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### Author:  [@Brian-1](https://forums.allen-heath.com/u/Brian-1)
#### Post date: [1 June 2026 19:52 UTC](https://forums.allen-heath.com/t/connecting-qu-5-to-qupac/32195/10 "2026-06-01T19:52:05Z")
I believe you can connect the QU-pac to the new QU-5 console, but the QU-5 console must act at the master clock. This means the clock in the QU-5 should be set to “internal” and the clock in the QU-pac should be set to “Slink”
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### Author:  [@SQuser](https://forums.allen-heath.com/u/SQuser)
#### Post date: [1 June 2026 20:32 UTC](https://forums.allen-heath.com/t/connecting-qu-5-to-qupac/32195/11 "2026-06-01T20:32:17Z")
As far as I am familiar with the older QU models, there is no option to change the audio clock source on them.
Therefore, this needs to be done on the QU-5 - something the OP likely knew and has already done.
Why this isn’t working in the present case is a mystery to me.
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### Author:  [@dandrews75](https://forums.allen-heath.com/u/dandrews75)
#### Post date: [1 June 2026 21:26 UTC](https://forums.allen-heath.com/t/connecting-qu-5-to-qupac/32195/12 "2026-06-01T21:26:00Z")
That’s right. There is no option to change the Sync on the QU-PAC so I set the QU-5 to Slink sync.