I feel like a dork asking this question but how do you connect the amplifier to your mixer. I see that there are places for a banna plug however my mixer will not take a 1/4 banna plug.

If you are experiencing an issue where the QSC RMX 1450 amplifier is not giving any sound when connected to the main output of your Mackie 16 OK mixer, but works when connected to the aux send, here are some possible causes and solutions:

1. Check the main output level on the Mackie mixer. If the level is too low or muted, this can cause the amplifier to not produce any sound. Increase the main output level on the mixer and check if the amplifier produces sound.
2. Check the cables connecting the mixer to the amplifier. If the cables are damaged or not connected properly, this can cause the amplifier to not produce any sound. Ensure that the cables are connected securely and are not damaged or broken.
3. Check the amplifier settings. Ensure that the amplifier is set to the correct input source and that the input gain level is set correctly. You may also want to check if there are any protection modes or limiters enabled on the amplifier.
4. Check the speaker connections. If the speakers are not connected properly or are damaged, this can cause the amplifier to not produce any sound. Ensure that the speakers are connected correctly and are not damaged.
5. If none of the above steps work, there may be an issue with the mixer or the amplifier. You may need to contact a qualified technician to further diagnose and repair the problem.

Remember to always follow the manufacturer's instructions and safety guidelines when working with audio equipmen

The problem is likely in the power supply. I recommend taking into a repair shop.as it is not a user servicable problem.

http://www.peavey.com/products/index.cfm/item/699/116338/PV%26nbsp%3B20%26nbsp%3BUSB

Look under "Downloads" tab at bottom for owners manual info. In a nutshell...mic to mixer channel #1, mixer connected to power amplifier, amplifier connected to speakers. Start with zero volumes on all equipment, bring up amps 1st (1/2 volume) and then adjust mixer until sound is heard from the microphone.

Instructions

1. • 1

     Place your mixer in a location that will allow you to hear the sound coming from the speakers clearly. The best placement is opposite the speakers, centered between the left and right pair. Connect the power supply to your mixer.
     

   • 2

     Connect the female end of an XLR cable to a microphone. Run the other end of the cable to your mixing board. Plug the male end into the "Mic" port of an open channel. These channels provide the preamps that will shape the sound characteristics of the microphone signal, processing them for output. Repeat the process for each microphone in your rig
     

     
     

   • 3

     Connect one end of a balanced 1/4-inch cable to the left channel jack labeled "L" found on the "Main Out" panel. Connect another cable to the right channel jack with the "R" label. Connect the opposite end of each cable to the matching left and right inputs on you amplifier.
     

   • 4

     Power on your mixer and amplifier. Test each microphone connected to the mixer for output.
     

   • 5

     Adjust the volume of each microphone channel to create a balanced mix. Use the "EQ" knobs to shape the tone and cut out frequencies that are causing squeal and feedback.
     

   
   Audi Performance Chip
   

The output of mixer connects to channel A or B of the separate amplifier and the output of the am connects to the speakers. Amp channels are listed as A and B or 1 and 2 instead of Left and Right because the manufacturer does not assume how you may wire your system. Please remember that compression, limiters and EQ device connect between the mixer and the amplifier with their prespective IN and OUT levels adjusted accordingly.

Looks like it takes regular home theatre speaker wire. If this is a powered speaker (like a JBL eon g2), then all you need is a passive mixer, and connect the speakers to the mixer. If this is not a powered (amplified) speaker, then you will need an amplifier to boost the sound source and drive the speakers, so you would connect the mixer to the amplifier, then the amp outs to the speakers.

You DON'T connect speakers to this... this is NOT a powered mixer... you MUST use external amplifier !!!! You use bvalanced (TRS) cables to a suitable power amplifier which connects to speakers. Some Behringer mixers such as the PMP5000 have built in amplifiers to drive speakers... yours does not.

There are a number of configurations for a mixer like the 1832, the most common are PA system and Recording system. There are Main output jacks which carry the mix as summed in the main faders. These in a PA system would feed the pa amplifiers which drive the house speaker system for the audience. These connectors are XLR 3 pin type on the rear, intended for professional pa amplifiers which use balanced +4dbv line input level. Amplifier which have 3 pin XLR connectors for input signals can accept that high level signal. For home style HiFi amplifiers, the signal level is nominally -10DBv and balanced or unbalanced signal lines with 1/4in diameter phone plugs which are connected to the mixer by way of a second set of Main output connectors which are 1/4in phone jacks. Use whichever amplifier input level your amp has.
If you are not using it as a main PA house mixer, but using it for recording, the main output connectors go to a 2 channel recorder or computer sound card recorder. The power amp and your monitor speakers are connected to the connectors labeled "Control Room" (CTRL Rm). These output are useful for recording because the signal through the mixer can be monitored from several buses, Solo, main mix, selected by buttons provided. The buttons only affect the signal heard through the control room monitors, and not the main output which only sees the main mix so selecting "solo" does not interrupt the signal going to the recorder while the engineer in the control can be checking other signal paths through the board.

You will need either powered speakers or an amplifier for the speakers. If you have powered speakers with built in amplifiers, use balanced audio connection cables from the MAIN outs of the mixer to the speakers, Use XLR or 1/4 inch TRS cables.
If you do NOT have powered speakers you will need amplifier as well and speaker cables in addition to the audio connection cables above.

Look on the top right corner should be to main output plugs which connects to a amp.