Will a Behringer UB2442fx-PRO run 2 main PA speakers plus two passive stage monitors without blowing up?

You can download from here... http://www.behringer.com/EN/Products/UB2442FX-PRO.aspx

It Depends how many Channels you are wanting for a basic 2 deck set up using Cdj's you would want 4 channel 2 per deck 1 master out and 1 booth so you can hear it through your head phones but if you were doing Karaoke you would want 6 channels for 2 microphones all going 2 the master out. but it changes again if us software and controller because most software has an internal and external mix mode. Here is a video that might help

This place has a great selection of Behringer parts. You should be able to find your knob here: http://www.dbmproaudio.com/behrparts.html

The outputs of these mixer needs to be connected to an active speaker.

An active speaker have an amplifier and a preamplifier.

Check the type of microphones connected and set the proper settings,

and connect it to other mic inputs .

Did you have the same speakers you test with at the store? If not, that is the problem. This unit will generate 400 watts a side when used on 4 ohm speakers, and a little over 200 watts a side with 8 ohm speakers and about 120 watts a side with 16 ohm speakers. For mics, the trim controls will be between 3 o'clock and full right. You set these using the PFL button with loudess vocal such that the indicator does not reach into the clipping. Do this for each channel. ALWAYS use balanced lines where possible. Use of unbalanced cables input results in a 6 Db loss. You will want to run the channel and main faders normally in the 80% range, like between -5 and 0 for BEST signal to noise ratio. There are good videos on You tube about mixer setup. If the speakers were not the ones tested with, your speakers may be the problem... I HOPE they are NOT consumer stereo speakers as you will soon smoke them with this mixer... the consumer speakers are very inefficient and you won't get much sound before blowing them up. If you spent less than $300 for EACH EV speaker new, it is UNLIKELY they are suitable. The suitable ones I found for 12 inch are around $600 each...hopefully these are the ones you have. There are less expensive brands. Frankly, if you want more sound, especially bass, I would go up to 15 inch speakers. These are probably the lowest end price wise to consider: http://www.musiciansfriend.com/pro-audio/behringer-b215xl-15-1000w-passive-pa-speaker Shop around, but stay with PA rated pro speakers as consumer ones just won't take it and eventually fail when used with these amps. ALSO be very careful if you use 1/4 inch speaker plugs as the SLEEVE of the A channel of this amp is the HOT, not the TIP of the jack... short the sleeve to something grounded and it is goodbye amp.

You can use the compressor in two ways. 1st you can go inline from the main outputs into the compressor out of the compressor to the rest of the world using normal cables. You may also insert the compressor into the main inserts using a cable that is tip, ring, sleeve 1/4", to seperate 1/4" tip sleeve mono plugs. any more questions give us a call at the store 215-736-8055

Check the 5 volts to the FX unit, If the voltage is low, the FX processor will keep reseting generating clicks, In a different product, the 5 volt filter cap was degraded and voltage dipped down to 4.5 volts causing resets.

You would get about 200 Watts RMS per side using 8 ohm speakers. "Not much volume" is very relative. With the two 12 inch speakers you should be able to fill a 600 to 1000 sq ft room nocely.

Passive loudspeakers are connected to the two "Speakon" connectors on the back of the unit. BUY GOOD cables for your speakers!!!! Whatever you do don't have a speaker line come loose while driving audio out !!! You will arc- out the rear-most power amp... I know, I repaired two of these now with the problem.

Connect the recording device to either the "tape OUT" RCA jacks or either of the pairs of MAIN out TRS jacks.

Set the slide switch for the MAIN L/MAIN R (upper position) leave this in this position unless you understand what the other positions are for to avoid damage. You will NOT need the other positions.

Further: Power ALL interconnect devices from the SAME receptacle source to avoid ground loops and possible damage.

YOUR passive speakers should be rated at least 300 Watts RMS continuos power handling or 600 Watts peaks.

Drive consumer stereo speakers with this and you will smoke the speakers and MAYBE blow the amp. This is a powerful amplifier and if you don't have at least 15 inch speakers you MUST really hold down the volume lest you blow the speakers.

Above all read the manual... yes, it is a bit hard to understand...

If you have a problem you can contact me by email for a bit of help. I have wo of these I have been using at venues now.