I have just bought an Behringer EP4000 amp. How do I connect 2 x B1520 and 1 x B1800X speakers to this amp? Thanks!

Use splitter cables to double your outputs. The signal strength will be half to each speaker per channel. i.e. if each channel has an output of 100w then splitter cables will give you 4 x 50w to connect up. Aim to use speakers rated below the max output rating of your amp, so in this example 4 x 40w speakers would be safer (won't blow your amp) than 4 x 60w speakers

send to shop....copy of QSC amp...

The rule of thumb is you control your audio on the low side. That means you plug your mics, tuners, audio sources into the pre-amp and then the pre-amp into the equalizer/mixer ant finally the mixer into the power amp and the amp into the "large honkin' speakers". The inter connects on the low side (between the source, the mixer and the power amp are usually done with RCA plugs. Use a good quality set of cables to get good tight connections and solid grounding.
AUDIO SOURCE?MIXER?POWER AMP---
heavy speaker wire sized to your SPEAKERS.

Run one per channel... DO NOT forget to use an electronic crossover feeding the amps as the speakers are rated only up to 300HZ so you need a low pass feeding these or you may burn them up. Some people are using the DriveRack crossover module for example to prevent sending highs to the subs and smoking them.

You can do that but your subs will have to be monsters or you will blow them out as bridged mode will drive 2400 watts RMS into 4 ohms. Many speakers are rated in peak or program power... these are FAKE specifications. with this amp in bridged mode each of two identical speakers would have to be rated at 2400 watts program or about 3600 watts peak each to survive... When rating speakers and amps ALWAYS compare RMS values... and for safety use an amp of 80% of the RMS rating of the connected speaker or speaker system.

Register and download the manual for free at retrevo.com

http://www.retrevo.com/support/Behringer-EP4000-Amps-manual/id/23591dj795/t/2/

http://www.raltron.com/cust/tools/parallel_resistance.asp

It's ohm's law, dude. 1/a + 1/b = 1/total. One each 8- and 4-ohm speaker in parallel per channel would be 2.7 ohms (nominal). So it will work in theory.

How you manage the potential difference in volume between dissimilar speakers on the same amp channel is a mystery.

Distortion will kill any speaker, not power. Stay within the amp's usable range.

First let's clean this up. All that stat stuff is just clutter.

equipments as follows...

behringer ep4000
http://www.retrevo.com/support/Behringer-EP4000-Amps-manual/id/23591dj795/t/2/

behringer ep2500
http://www.retrevo.com/support/Behringer-EP2500-Amps-manual/id/23281ci655/t/2/

2 yamaha s215v
http://www.retrevo.com/support/Yamaha-S215V-Speaker-Systems-manual/id/962bh237/t/2/

jbl mrx 518

behringer crossover cx2310
http://www.retrevo.com/search?q=behringer+crossover+cx2310


How do you connect them properly? According to the manuals, particularly the one for the s215v's. Page 5.

Register and download them for free at retrevo.com

Loop cables through the handles at each end as people tripping over cables yank them sideways breaking them.

You can get replacement switches. The internals of the switch probably broke and no longer connect causing the speaker to not work. FullCompass.com is the Behringer parts distributor but they may direct you to first call Behringer to get a part number for the item.

Better way... Connect the main speakers via the Speakons and then put a Power Subwoofer to one of the Monitor connections IF you are not using both stage monitors. If you need to kill the lows to the mains, use the EQ in the PMP-3000.

Use the EQ that is USUALLY on the subwoofer to kill the highs to the sub.

Lot less cables and hardware.

REMEMBER for equipment safety, power ALL interconnected equipment from the same source be it a receptacle or power distribution system.

Powering parts of a system from receptacles strewn around a room is asking for trouble of ground loops and ground faults.