I have been using two Peavey Pro 15 Mk ii 300 Watt Passive 15" Speakers with two additional speakers on the output side and i notice one of the peavey speakes wasnt working! i then realised i had the lead from the pa in the output instead of the input on the speaker now i have no sound! which part will it be that has blown?

We'll need the make and model of your mixer in order to help you.

sounds like an internal connection problem. open access panel and check the solder connection is not broken or loose. Be sure the metal mesh jacket is not touching the lead wire as that would cause a scratchy noise and feedback, or maybe near the internal cable causing feedback

Ok,

First of all i need some more information, such the power amp you've hooked to them rating in watts and please specify if you are not getting sound from tweeter or 15" BW speaker or both of them, this way i can improve accuracy helping you out.

Try connecting them to another amplifier...you can use the speaker output of a guitar amp as a quick test. If the amp (and mixer) check OK, it sounds like you are about to become good friends with your local speaker reconing shop.

Remember...Distorted Audio Can Kill Speakers even at low volumes. It happens because sine waves become square waves. Google it for additional information.

These cabinets are self contained and you do not use a crossover with them. The speakers do NOT come out to separate connectors. You just drive these with an amplifier. DO PAY ATTENTION to the power rating... you are safe using an amplifier with a MAXIMUM of 150 Watts RMS per speaker cabinet. More than that and running them loud and you will be replacing the speakers. These will cover a 40 foot square room at comfortable level.

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.

DO NOT run amps into clipping. Also, while the speakers are rated at 600 Watts, you don't want to use an amp that delivers that much RMS. Use about 300 Watts per side. Unfortunately you did not mention the brand of amps you are using. I will also caution you that the speakers have protection networks that if you are getting supersonic feedback that you can't hear that can burn out the amps. DO NOT boost the highs if the mics can "hear" the speakers or the reverberations from them. Solid connection of speaker cables is important. Intermittent connections can fry amplifiers... I won't go into the technical reason for this other than to say the amp's feedback circutis get confused when the load shifts.

You might also have the speakers checked since they can have an intermittent that is popping the amps. If you happen to be using BERHINGER PMP amps, please read my tip about the grounding hazard where the sleeve of channel A is hot and the tip the cold that I have in the Fixya tips.

First off it's outputs to your speakers. If you had an extra set of powered or amplified speakers you could "Y" cable your speaker outputs. Your passive speakers won't work without an amp. You really need powered speakers or an amp for your extra speakers. (if you had powered/amp'd speakers you could run them off one of you "aux" out for monitors. Do not daisy chain your speakers connecting twi together, you'll change the resistance/ohms and damage your speakers. Trust me, I do this for a living.

Here is a link to the manual:http://www.peavey.com/assets/literature/manuals/00513220_7.pdf I didn't look at the manual for the crossover but this is probably the way I would do it. Look at page 13 in the manual : Come out of the Main out (31 in the diagram) into the main in of your crossover. Go out of your crossover Hi and Mid out setting back into Power amp In 1 (labelled 32 in the diagram). Hook your speakers that you normally use to the output jacks on the back of the Peavey. Make sure you match the output impedances. Go out of your crossover low output into the Pyle power amp and out of the Pyle into your subs. Make sure the impedance ratings of all your speakers match the output impedances of your amps. You will only be running in Mono mode as that is the signal output of the Peavey mixer. You can run faux stereo by using the Main monitor Out as 1/2 the pair and the Main Out as the other 1/2 to both channels of the crossover but you won't be getting a true stereo pan mode.

Troubleshooting is always a "process of elimination." Have you tried hooking up your Peavey powered mixer to another set of speakers? How about connecting the speakers to another audio system? Your term "very little sound" could mean audio input problems, mixer/amp settings or failure and possibly speaker damage (internal passive crossovers). Please be more specific.