Unofficial Mackie User Forums > DL1608/DL806/DL32R/ProDX Mixers

channel crosstalk

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paulfrench:
on the gain knobs, but I was looking at channel 13 which has markings for high/low z. sorry for the confusion

so, the signal in the unused channel doesn't start to go away until I lower the gain knob to 20db or lower

also, on gigs we are using almost every channel, so instead of calling it the "unused" channel, it's better called "incorrect" channel I suppose

WK154:

--- Quote from: paulfrench on January 05, 2015, 02:31:54 PM ---on the gain knobs, but I was looking at channel 13 which has markings for high/low z. sorry for the confusion

so, the signal in the unused channel doesn't start to go away until I lower the gain knob to 20db or lower

also, on gigs we are using almost every channel, so instead of calling it the "unused" channel, it's better called "incorrect" channel I suppose

--- End quote ---
To be sure your input signal is at 0 meter position and  for test purposes nothing is plugged in to all other channels. The adjacent or other channels only go to 20db on their trim knobs before you see meter activity? That means you have 20db of additional noise somewhere in the circuit. Which MF version are you using? V3 has different meter scales. We are just dealing with channel input meters to be sure. On the channel with the input signal make sure you are at 60db of gain if the input signal allows it. We don't want to test the input source just the preamps. A clean source will help.

paulfrench:
I'm running the latest MF with the latest firmware update.

I have an old Fostex test tone generator kicking around somewhere, would that qualify as a clean source?

sam.spoons:

--- Quote from: paulfrench on January 06, 2015, 02:36:28 PM ---I'm running the latest MF with the latest firmware update.

I have an old Fostex test tone generator kicking around somewhere, would that qualify as a clean source?

--- End quote ---

I'm running MF2 on a DL1608, I have noticed this but never tested it, maybe I'll have a look.

I also have a Fostex tone gen and yes I'd say it would qualify.

Greg C.:
One thing to bear in mind is that the metering on the DL goes down to below -60dB which is not something you'll find on most analog mixers, so you'll never see crosstalk with those. High res metering is something you find on digital desks these days and you are much more likely to see noise and crosstalk. You're not hearing it because -80 to -60dB is extremely low level. More expensive larger desks will have less crosstalk due to greater physical spacing and possibly better shielding between the preamp circuits. So this is probably a non-problem problem. The easy fix would be for Mackie to change the metering scale to be less sensitive ;)

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