Mackie ProFX16v2 Owner's Manual

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oFX8v2 • Pr

oFX12v2 • Pr

oFX16v2 • Pr

oFX22v2 • Pr

oFX30v2

If you think your mixer has a problem, please check 

out the following troubleshooting tips and do your best 
to confirm the problem. Visit the Support section of our 
website (www.720trees.com) where you will find lots of 
useful information such as FAQs, documentation and 
any updated PC drivers etc. You may find the answer to 
the problem without having to send your mixer away.

• 

Is the channel EQ set up nicely?

• 

Is the channel gain set correctly?

• 

Is the channel level up enough?

• 

Is the channel OL led on?

• 

Is the channel pan set in the middle?

• 

Try the same source signal in another channel, 
set up exactly like the suspect channel.

• 

Is phantom power required for your  
microphone?

• 

Is the main level turned up?

• 

Are the EQs set to reasonable levels?

• 

Are any aux returns maxed out?

• 

Unplug anything from the other line-level  
outputs, such as monitor out, just in case  
one of the external pieces has a problem.

• 

Make sure that you are not overdriving the 
amplifiers. Check the loudspeaker average load 
impedance is not less than the minimum the 
amplifier can handle. Check the speaker wiring.

• 

Turn the channel gains down, one by one. If the 
sound disappears, it’s either that channel or 
whatever is plugged into it, so unplug whatever 
that is. If the noise disappears, it’s from your 
whatever.

• 

The power LED should come on if the mixer is 
connected to a suitable live AC mains outlet, 
and the power switch is on. Check to make sure 
that the power cord is securely plugged in.