As soon as the music gets loud, the amp shuts down!

•Check the M•2600’s meters. Be sure that OL is not lighting up frequently or continuously.

•Can the amp breathe? The M•2600 amps draw their ventilation air in from the front and out through the side panels. They need plenty of fresh air to stay cool.

Do not block the ventilation ports.

•Is the SHORT LED lit? If so, you’ve got a dead short somewhere in your speaker setup, or the total impedance of the load is too low. Turn the amp off and rectify that right away.

No mid or high frequencies!

•Make sure the OUTPUT APPLICATION switch is not set to LOW OUT (SUBWOOFER).

It hurts when I touch my arm, or my leg, or even my head!

• You have a broken finger.

Bad sound!

•Is it loud and distorted? Turn down the signal coming from the mixer or signal source.

•Is the input connector plugged completely into the jack? Check the speaker connec- tions and verify that all connections are tight and that there are no stray strands of wire shorting across the speaker terminals.

•If possible, listen to the signal source with headphones plugged into the console. If it sounds bad there, the problem’s not in the amplifier.

•Keep practicing.

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 device.

•Is there a light dimmer or other SCR-based device on the same AC circuit as the monitor? 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’s not in the amplifier.

•See “Grounding” in Appendix C, page 37.

REPAIR

Service for the M•2600 amplifier is available only from one of our authorized domestic service stations or at the factory, located in sunny Woodinville, Washington. Service for Mackie amplifiers 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 1-800-258-6883, 8am to 5pm PST, to explain the problem and request an RA (Return Authorization) number. Have your amplifier’s serial number ready. You must have an RA number before you can obtain service at the factory or an authorized service center.

3.Keep this owner’s manual. We don’t need it to repair the amplifier.

4.Pack the amplifier in its original package, including endcaps and box. This is very important. When you call for the RA number, please let Tech Support know if you need new packaging. Mackie is not responsible for any damage that occurs due to non-factory packaging.

5.Include a legible note stating your name, shipping address (no P.O. boxes), daytime phone number, RA number, and a detailed description of the problem, including how we can duplicate it.

6.Write the RA number in BIG PRINT on top of the box.

7.Ship the amplifier to us. We suggest insurance for all forms of cartage. Ship to this address:

Mackie DesignsSERVICE DEPARTMENT16140 Wood-Red Rd. NE, Ste 5Woodinville, WA 98072

8.We’ll try to fix the amplifier within three business days. Ask Tech Support for current turn-around times when you call for your RA number. We normally send everything back prepaid using UPS Orange (three-day air). However, if you rush your amplifier to us by next-day air, we’ll treat it in kind by shipping it back the same way in which it was received . This paragraph does not necessar- ily apply to non-warranty service.

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