Hi,
When i use the ST ins for my keyboard i get full sound, however when i use 1/4 to xlr using 2 channels linked, there is a lack in the low frequencies like its having HPF but it does not.
Any help would be appreciated
Thanks
Is the cabling between the keyboard and the CQ the same in each case? Or is the cabling different (ie using a direct box or adapter, etc)?
Sounds like a phase cancellation thing. I’d suspect the wiring in your connecting cable. It needs to be specifically wired for this scenario - unbalanced with the tip of the 1/4" being wired to pin 2 of one XLR (with common earth and ‘cold’) and the ring of the 1/4" being wired to pin 2 (again) of the other XLR (again, earth and cold wired together).
Then also check that both channels are either polarity inversed or not - you can’t invert one and not the other or cancellation (most usually the lower frequencies mostly) will occur.
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And in addition:
Also make absolutely sure that phantom power is not accidentally switched on on such a channel.
It could cause sound problems or even damage your keyboard.
It would be safer if you used the TR(S) of the combi jacks.
So what happens if you don’t use XLR connectors, but use the same TR cables as on your ST input?
Hi
Thanks so for your help,
The polarity wasn’t inverted
And the phantom was off,
But I use balanced to XLR which I always use on my X32 and never had a problem.
However, I would like to repeat my question:
What happens if, instead of your 1/4 to XLR cables, you use the same 1/4 to 1/4 on the combi jacks that work perfectly on your ST input?
Do you then have the same problem with the lack of bass on the same 2 inputs?
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As stated in the original post when i use the ST ins (1/4 to 1/4) i get full sound no problems
And: … if, instead of your 1/4 to XLR cables, you use the same 1/4 to 1/4 on the combi jacks …?
Yes using balanced 1/4 to 1/4 into the ST combo Jacks works fine.
Yes using balanced 1/4 to 1/4 into the ST combo Jacks works fine.
Using balanced 1/4 to XLR linked channels (tried on 1 and 2, 7 and 8, 15 and 16, did give me a lack on the bass frequency with HPF unactive
Then something is wrong with the 1/4" to XLR connectors. I suspect they are not actually wired correctly.
Sorry if I have to ask again:
I meant the same inputs with the same settings, of course and your inputs 1/2 and 7/8 cannot be combi jacks.
So if you use 15/16 and plug 1/4 in there the basses will work but not if you use XLR plugs there.?
You mentioned using balanced (TRS) 1/4" to XLR cables, does your keyboard actually have balanced outputs on it’s L/R 1/4" jacks? Many keyboards do not. This could cause issues.
Also, as @eeskuh - have you tried using your 1/4" jack - 1/4" jack cables to connect to the combi XLR/jack inputs on the CQ (i.e. channels 9-16 inputs)?
If you’re wanting to connect a keyboard or similar using an XLR input on any mixer, I’d highly recommend using a DI box, such as the Klark Tehnik DN200 for a stereo keyboard, to put something between the mixer and your keyboard to protect it from phantom power - no matter how careful we are, it’s just one slip up away from a potentially very expensive repair.
Edit: Plus what @aisle-6 says below - a DI box will impedance match and ensure correct input levels hitting the mixer.
It could be an impedance mismatch as XLR inputs are generally low impedance 600ohm and ¼” are high impedance. Plugging a high impedance device into a low impedance input can cause this.
This is what a DI box is built for.
Simply get a DI and happy days will come your way. 