Mackie FR1400, FR2500, FR800 Repair

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Owner’s Manual

One side is louder than the other

• 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.

Poor Bass response

• Check the polarity of the speaker cable connec-

tions. You may have your positive and negative

reversed at one end of one speaker cable.

As the music gets loud, the amp shuts down

• 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. Do not block the ventilation

holes.

Noise/Hum

• 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.

Repair

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.

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.