Chosen Solution

Ive had a pair of mackie cr4s for over a year now and cant say ive used them too much. When i went to use them last week they turned on but no sound was coming out, i plugged some headphones in and the sound played perfectly through them? I also noticed that when i turn them off by the switch on the powered monitor, sound will come out the speakers for a second before they turn off? Any help appreciated. Update (06/12/2018)

I suspect that the amplifier section has a problem. There are protection circuits that will cut off the output to the speakers to prevent the speakers from damage. Without opening up the amp section and taking measurements, I can’t say for sure what is faulty. The headphones take significantly less power and may be tapped at the pre-amp level. I don’t have a service manual available at this time for this so some of this is speculation based upon working on similar devices for 30+ years. If you can gain access to the amp section, post a few photos here and I may be able to direct you on what to check. Dan

Had the same issue, caused by the heat around Z4 diode. Fixed by replacing the dead cap C74 (100u/16v) and the diode Z4 (12v 1W zener 1N4742), check maybe you need to replace more components, R2 for example. This area of the pcb is generating “mute” signal for the amp, so no wonder the trick of cutting “mute” pin of tda7265 works sometimes

Exact same problem with Cr5. I saw some workarounds suggested in the following link, but they didn’t help me. I’m angry that I didn’t find out about this issue before buying the %#*@ things, I’ve used them for less than 8 months! ++No audio coming out of Mackie CR3 Studio Monitors

I had the same problem and I managed to solve it without spending more than 5 dollars, you only need to replace 5 very economical components and 30 minutes send me an email and I will explain how to repair them. Greetings.  ar.genome@gmail.com

I have the same problem here with the CR4. I did cut the mute lug on the power amp chip, but that didn’t help. My L/R switch is very loose and faulty, if I push it it sometimes works and can I hear both speakers. And then sometimes a left or right speaker mutes, or both. Very annoying…. what a poor build. Not sure if I can replace or take out that switch?