Hello Robotek. I have a question for you on this subject http://www.fixya.com/support/t624729-replace_4_pin_plug_behringer_v_amp2_psu , if I could also spread thisdivision into which pins enter the tension. My e-mail firstname.lastname@example.org. Adriannek
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Eurolive Active speakers from Behringer suffers of bad power supply/Amp design, if you open up the back of your speaker you will probably find that the AC connector has a burnt or loose connection as well as a black spot, if not, check the power supply/power amp coils for cracked connections, let me know for improve help.
Line level output of the mixer would go into the line level inputs of the EQ, and the EQ line level outpputs to the line level inputs of the amplifier. If you are faced with a mix of unbalanced inputs or outputs, to balanced inputs or outputs it gets a little complicated because you need to matrix the balanced signal to unbalanced load and vice versa. There is no single answer to doing this either.
RCA jacks are unbalanced, 2 conductor 1/4 inch connections are unbalanced most of the time. XLR and 3 conductor 1/4 inch jacks and plugs can be either balanced or unbalanced.If either are wired so left and right are a single ring or tip on the 3 conductor 1/4 inch jack, it is unbalanced and they would share a common ground lead. XLR wired with one pin common with shield and right and left have a single conductor on the plug or jack, that is unbalanced.
2 wires plus ground needs a stereo 1/4 plug. Don't know Mark 4, but Mark 3 has 2 button fs with 3 wires plus ground. Schematic here: http://el34world.com/charts/Schematics/files/peavey/peavey_mark_3_bass_with_pa.pdf
shows 3 wires plus ground. Stereo plug does not have enough connections, only ground plus 2 wires.
Count the pins of socket and find DIN plug with proper pin-out for socket. Search google for DIN plugs.
For goodness sakes do NOT replace the fuse... doing so causes more damage inside. Likely one of the power amps has shorted and may have damaged the power supply as well. Also please read my tip on Fixya regarding a HAZARD with channel A if you use 1/4 inch plugs with the speaker cables. Essentially the sleeve of the channel A plug is the hot, and not the tip. Ground the sleeve of the plug and you can blow the channel A amp. YOU WILL NEED TO TAKE THE UNIT IN FOR REPAIR... THIS IS NOT A DIY REPAIR!!!!
MAKE SURE the cables you plug into 1/4 inch mains are TRS plugs, and not mono cables (TS). The main output 1/4 inch jacks are TRS balanced outputs and if you plug mono (TS) cables that shorts out the ring connector reducing the power by 6 Db. USE ONLY TRS balanced cables for interconnects !!!! Also read my tip on Fixya regarding PMP mixers. If you use 1/4 inch SPEAKER cables or adapters, if you short the SLEEVE of channel A output to ground you can pop the channel A amp. The TIP of channel B is the hot BUT the SLEEVE of channel A is the HOT. The ttip I posted explains why this is and it isn't mention in the Behringer documentation.
The power amps may be blown... PLEASE read my tip on Fixya about the hazard with PMP mixers if you use Speakon to 1/4 inch cables. The sleeve or barrel of the Channel A plug is the hot, not the tip. Touch it to ground and goodbye Channel A of the amp.
Do this test: Plug a set of earphones into the Main out L and R jacks and see if audio comes out there. (it will only be in one side of the headphone and not too strong... If both L and R have signal there is a problem with the power amp or its configuration. Make sure the slide switch is up in the MAIN L/R position (top position) If all that is correct, the power amps have probably blown. Repair takes a lot of work and getting parts from Behringer now is really hard. The amp module is an HCA2400 and the only source seems to be FullCompass.com...
just use the main left and right outputs of the behringer to run xlr (3 prong balanced) to 1/4 inch (looks like a big headphone plug) cables into the inputs of the crown amp. the mixer has the xlr outputs and the amp has 1/4 inch inputrs, sop the cables will have to reflect that on both ends. run the outputs of the amp (rca outputs, i believe, you may have to get a rca plug to 1/4 inch jack adapter, and then use a 1/4 inch speaker cable) to the inputs of the speakers, again, the amp has rca outputs and the speakers will likely have 1/4 inputs, so you will have to address that wil an adapter. have each speaker in its own channel.