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Mackie SWA 1501 limiting problems, I seem to be getting the limit switch on the back of the mackie bass bin coming on constant.The levels of the mixer are fine,could there be a problem with mains source? Cheers!!

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Yes it maybe mains proplem and you must check it with voltmeter to solve your problem

Posted on Jun 28, 2008

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I have two Mackey 18" powers subs. One shows that it's on and play but no sound. Any idea?

well mackie is a favorite of mine, but i need which kind of mackie and how is your whole system wired. Since it won't be for home use, or it is..... I like the big ones at home with a compressor..... way nicer , not pounding sub .

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I would need to hear it to be completely sure (does it sound a little bit like slow morse code?), but it sounds like what you're hearing is probably cell phone interference. Certain cell phones are more likely to cause it (anything with PTT capability) because of their transmitter power, but any cell phone close enough to the receiver could give you grief. If you're playing in unpredictable places, try to get the antennae well overhead of the audience, with a straight shot to the transmitters, and as close as is reasonably possible.

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You mean this one -

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I am trying to troubleshoot a Mackie SRM150 without a schematic. The problem appears to be in the mixer section. I can trace the signal to the input of this section, but have nothing at the input of the...

I contacted Mackie and they sent me the schematic but I had to essentially sign a "non disclosure agreement" in order to get it.

Call them, they are easy to work with.

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How to disassemble a Mackie SR24 4 2 Mixing console for cleaning, and how to properly clean pots, faders, switches and inputs. Thank You, Don

Can't help with the disassemble, but I restore vintage receivers, so I can help with controls. Your local guitar shop should carry a product called "Faderlube", or you can order it on line. There are two versions, the 10% solution and the 100% solution. Spray the 10% first, and work the pot or fader from one limit to the other 50 times. Repeat with another spray and workout. Then follow up with the 100% solution. The 100% provides lubrication. You have to make sure you get the fluids inside where the sliding resistive parts are. You can usually tell if it's working because the fluid will cause the pot to turn or the slider to slide more freely. This process will cure 90% of your problems. When you test, you may find some of the controls are still dirty, and you have to go back and repeat the process, but before you do, try just working them 200 turns and see if that does the job. There are cheaper cleaning products, but don't mess with them. Shell out the bucks for the real thing.

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I have a crate BX 160 that shuts down at the point where it starts limiting and then after a about 30 seconds. it starts back up. I would like to get a schematic on this particular piece of equipment...

I just saw your post. I happen to have a Crate BX-160 and was able to call Crate in St. Louis and talked with a tech there at the plant and he actually sent me full schematics for free.

Your problem, based on my electrical background and fixing audio equipment for 10 years, seems to be related to the built-in limiter in the power transformer. In other words, you might just need a new power transformer and it is a piece of cake to install (all push-on connections).

The schematic will show you the many test points for voltage checks, but unless you know what you are looking for, its just information overload. It is a rather simple amplifier and built resonably well. I have been using mine since 2003 and have fixed it a few times (age related problems like loose connections). There just is not much to go wrong on them except for the fact the amp is subjected to extream vibration. THis causes physical connections to fail resulting in vexing issues that are hard to solve. This is not unique to this amp (all bass amps).

I would bet anything your problem is the power supply shut-down circuitry is malfunctioning. In my expereience with amps, unless the amp is drawing current (failing power circuitry) and making strange sounds, the failure is usually not related to the power section failing (like power transformers going out). Likely, the built in limiter is the problem.

I hope this helps!

(development engineer)

Jan 20, 2009 | Audio Players & Recorders

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I have had the same problem with the wireless unit and thought the same, it didn't work. The way to fix this is simple. You need to do the 0, 1, 3, 5 on the remote and turn on the home theatre system on the main switch on the front panel (as I was doing this on the remote, and it was failing). The blue light should then stay illuminated. If not just switch the main on/off button again, and it shoud work.

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I have a pair of Peavey Impulse 1012 4ohm amp a Peavey XR 696f was not geting enough bass ( use a Yamaha TYROS keyboard & Vocals) so i purchassed a pair of Peavey messanger Pro 15 Sub Cabs 4Ohm cant...

Hi fingers 1

There will be some overlap in bass response that you may need to tune out to tone down the boomy bits. You could tune this out with a 31 band EQ Another approach is to use a crossover or low pass filter to the subs to get some control over your bass frequencies. Another thought, if you're using the rig for stage work, how does it sound out the front. It may be standing waves created by the bass bins, moving them to different monitoring positions may also help.

I am more than happy to answer any other questions you may have about it, just give me a hoy :) If you are still unsure, or have problems, then before you give a rating for this advice, please get back to me and we can try some more things.
Thanks for using FixYa, If you consider the advice I have given you as sound, a FixYa rating is a great reward for my efforts to help you. Cheers.


Jun 18, 2008 | Audio Players & Recorders

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