Looked at everything suggested. Finally found after taking off the front grille and lifting out the main speaker that one of the spade connectors to one speaker terminal was loose. Crimped it tighter and there you go. Problem solved. No wonder after years of pumping sound the speaker connectors get loose. Total cost zero. Hope you didn't spend hundreds replacing the amp. Cheers d
Did you manage to resolve this problem?
Buy a canister cold spray and spray on some active components if the noise begins You have a thermical failure in a component on the board can be faltering resistorcircuits or resoldering some active components.
SOURCE: My mackie thump amp will
Crackling is usally one or two things my guess would be bad grounding of the amp or bad connection with the jacks or plug it self try to make it crackle on purpose by jiggling the jacks see if it has any effect on the crackling try to narrow your possibilitys
Testimonial: "ok you think it is an electrical issue and not from the speaker I tried other wires. I believe the place has bad grounding to the outlets. Thank you"
SOURCE: have a low noise like
Make sure you are using BALANCED audio line to the speaker AND your mixer is powered from the SAME receptacle as this speaker. One MAY have to run an extension cord back to the mixer and othe equipment, but this must be done to reduce noise and also for equipment safety. Multiple recepatacles in a building have grounding issues that can generate noise or worse damage equipment due to ground loops. If you DJ mixer does NOT have balanced outputs, use DI boxes so you can use balanced lines to your speakers. Your cables will either be XLR or 1/4 inch TRS types, not just TS type.
SOURCE: I am trying to run
No there is no special cord. The aux you use for a monitor should be pre fader( that means the signal comes before the volume slider) turn the individual slider all the way down. Talk into the mike at the volume you would be singing at the loudest. Adjust the gain of that chanel up untill the clip light comes on. Now back it down so it dosent come on at your loudest. Now pick the aux you want to use. Turn it up 1/2 way, turn up the master aux send coresponding to the channel aux number 1/2 way you should get sound. If it's too loud turn it down if you need more turn it up. If you have any more questions, give me a call at the shop. Vito Vacirca Jr. Pro Line Music 490 Lincoln Highway Fairless Hills Pa. 19030 215-736-8055
SOURCE: TH-15A won't make sound. Comes on, then flashing
I've fixed over 100 of these beasts, hope i can shed light for you all ;-)
The flashing LED indicates the power supply rails (+28v and -28v) are being pulled down to 0volts by a (typical) fault on the amp board, usually means the amplifier chip has faulted (usually the LF amp, but on occasion can also be the HF amp).
Locate the 3wire(red, black, brown) connector that goes between the amp board and the larger power-supply board and disconnect it at the power-supply end. (it's actually hard-wired on the amp board end).
Now switch on the Amp, the LED should now be stable, which has proven you've isolated the fault.
Order a replacement board from Mackie, the part number is on the PCB.
From memory it's something like "002163-00" or something, but now you know what the part number will look like.
Depending what country you're in, Amp boards are around $100.
Enjoy!
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