Mackie FR800 Manual Do Utilizador

Owner’

s Manual

•  Are both Level controls set to the same posi-

tion?

•  Check your source signal to make sure the left 

and right signals are balanced. 

•  Are the speaker impedances matched? Differ-

ent speaker loads can cause different volume 
levels on each side.

•  Try switching sides: Turn off the amp, swap the 

speaker cables at the amp, turn the amp back 
on. If the same side is still louder, the problem 
is with your speaker cabling. If the other side is 
louder now, the problem is with the mixer, the 
amp, or the line-level cabling.

•  Check the polarity of the speaker cable connec-

tions. You may have your positive and negative 
reversed at one end of one speaker cable.

•  Make sure the OL LEDs are not lighting con-

tinuously. If so, turn down the signal source or 
the amp Level controls.

•  Can the amp breathe? It needs plenty of fresh 

air to stay cool. 

•  Check the signal cable between the mixer and 

the amplifier. Make sure all connections are 
good and sound.

•  Make sure the signal cable is not routed near 

AC cables, power transformers, or other EMI-
inducing devices.

•  Is there a light dimmer or other SCR-based 

device on the same AC circuit as the amplifier? 
Use an AC line filter, or plug the amplifier into a 
different AC circuit.

•  If possible, listen to the signal source with 

headphones plugged into the console. If it 
sounds noisy there, the problem is not in the 
amplifier.

•  Is there a cable-TV audio feed in your system? 

An incorrect ground may causes a "ground loop" 
hum.

•  Sometimes it helps to plug all the audio equip-

ment into the same AC circuit so they share a 
common ground.

Service for Mackie products is available at a factory-
authorized service center. Service for Mackie products 
living outside the United States can be obtained through 
local dealers or distributors.

If your amplifier needs service, follow these instructions:

1.  Review the preceding troubleshooting suggestions. 

Please.

2.  Call Tech Support at 1-800-898-3211, 7 am to 5 pm 

PST, to explain the problem and request a Service 
Request Number. Have your serial number ready. 
You must have a Service Request Number before 
you can obtain warranty service.

3.  Keep this owner’s manual and the detachable 

linecord. We don’t need them to repair the amp.

4.  Pack the amplifier in its original package, includ-

ing endcaps and box. This is VERY IMPORTANT. 
Mackie is not responsible for any damage that oc-
curs due to non-factory packaging.

5.  Include a legible note stating your name, shipping 

address (no P.O. boxes), daytime phone number, 
Service Request Number, and a detailed description 
of the problem, including how we can duplicate it.

6.  Write the Service Request Number in BIG PRINT 

on top of the box. Units sent without the SR number 
will be refused.

7.  Tech Support will tell you where to ship the ampli-

fier for repair. We suggest insurance for all forms of 
cartage.

8.  You will need to contact the authorized service 

center for their latest turn-around times. Once it’s 
repaired, the authorized service center will ship it 
back by ground shipping, pre-paid (if it was a war-
ranty repair). 

Note: Under the terms of the warranty, you must ship 

or drop-off the unit to an authorized service center. 
The return ground shipment is covered for those 
units deemed by us to be under warranty.

Note: You must have a sales receipt from an authorized 

Mackie dealer for your unit to be considered for 
warranty repair.