MR5 fuse dimention

Check the input level. Sounds like the signal is being clipped.

You may have blown a fuse in the amplifier. Refer to Appendix A: Service Info in this guide http://www.mackie.com/products/mr5/pdf/mr5_om.pdf under No Power section, and if the fuse it not blown, try some of the solutions under No Sound. Hope this helps!

Check for a defect on the solo switch. The rude lights when ANY solo is on. Sometimes the switches stick mechanically and don't fully come up.

IF that speaker runs noticeably hotter than the other channel speaker, you need to take it to an authorized repair center. Your monitors are apparently active types, so unless you are a trained audio technician, you should refer service to the pros. Apparently, the problem is in one of the power amplifiers in the affected monitor.

Forst thing is to put a known signal into the speakers, say from a CD recorder to isolate a possible mixer or other source being marginal.

If the sound is still bad, verify that your volume settings are reasonable.

DO NOT crank the gain on these speakers full and then throttle the signal to them as that cause poor signal-to-noise ratio.

If you have driven these speakers very hard (these are only INTENDED for lower level monitoring within the engineer's booth), you MAY have damaged the speakers. It htat case, repair will be necessary.

Try to determine if the lows or highs or both are bad sounding.

You likely have to format the stick from the unit before using. Also there MAY be a size limit for the useable stick.

For a flight case, it is best to find one that SPECIFICALLY mentions use for your unit. Having the supports in the right area to protect the controls is most important.

First thing is to run a known signal from a simple device like a small CD player to verify the problem.

If these are driven from a mixer, the EQ could be set to kill the highs.

Assuming it isn, something simple like an EQ setting, probably the units will have to be serviced. I know you would already have checked the EQ on the back of these things as a first step.

Remember to ALWAYS power these from the same source as the devices connected to them to avoid ground loops and damage.

Supersonic feedback can fry these. Oscillations higher pitch than you can hear can put too much power into the tweeters of these.

I would contact Mackie and see what they say. The MR5 is already protected internally by the built in amplifier circuitry as far as I know.They can be reached here:http://www.mackie.com/support/index.html

You should order an exact replacement from Mackie since this is a reference monitor.

Consider putting a limiter or fuse in series to protect the speakers if this was due to overdriving it.

Hi there. Search "top hat". There are 2 different depths. Compare measurements to space available in and on the enclosure where you plan to install it. (bottom)
Thanks
Paul