i just bought a set of polk 4x6 and a set of polk 6x9 here are the links to those speakers

http://www.circuitcity.com/ssm/Polk-...oductDetail.do

http://www.circuitcity.com/ssm/Polk-...oductDetail.do

And I also bought this mtx thunder amplifier for the speakers because the guys there told this would be enough to power the speakers

http://www.circuitcity.com/ssm/MTX-4...oductDetail.do

well lately it has been overheating and shutting down on me...I replaced the ground wire to larger gauge and it still does and it seems like its doing it more and more is my amp to small or is there something that im doing wrong with the wiring...ill post pics later

 

i could be wrong and probably am but do you think a relay would help keep it cooler

 

depending on how you wired up the speakers can cause that problem. if you have a four channel amp and only one speaker hooked to each output then you shouldn't have a problem. but if you hook two speakers in parallel and in bridge configuration to the amp then that is more than likely your problem as most amps are not designed to operate with that type of load and I have seen this exact problem before because of this. if this is the problem then refer to the manual that came with the amp for the different ways to connect your speakers

 

As far as the wiring being a cluster-fu*k, Its not about it being neat and pretty, but rather not inducting noise by the power and signals crossing paths. You have 4 4ohm speakers and if they are run to the dedicated induvidual (front-rear)(left-right) channels, that isnt going to be a problem for that amp. You could run 2 sets of 4ohm spks off each channel parallel and get more power within its range of 2ohm stereo. 1st I would start with how high the gain is. Over 3/4 = Too High. Just because its there dont abuse your equipment. 2nd you should look into the wiring for power and ground. The power and ground wires should be the same Gague. The ground should be grounded at the metal chassis like the floorpan and keep it shorter than 12inches from the amp. Also from what I can tell at MTXs site, tha amp has (2) 40amp fuses on the side, meaning it pulls a max of 80amps of current. Also it has a 4gague terminal for power and ground. If you are running it with any smaller (8ga is smaller than 4ga), then you are stressing it. 3rd You stated something about the wires being covered by the box or something like that. The amp needs to be mounted where 1. Its top is exposed so it can effeciently cool and disapate heat. and 2. Its mounted vertical or the top facing up...hot air rises. These simple things to address will make it run cool, effecient and a long time.

 

I know the wiring is a mess but my sub box covers it all up....my gain is not even set to half way...im not gonna lie im new at this sound system stuff this was the first car that i have done im not sure what to do about the band pass filter...to be quite honest i dont even know what that means i just have all of them set to off

 

I've never messed with an amp with that much adjustment built in to it. but I'm guessing you need to have the LPF(low pass filter) on to keep the low frequency bass sounds from blowing your speakers and adjust it to where you can not hear any distortion from the bass. probably also need to have the HPF(high pass filter) on and adjusted unless your speakers also have tweeters and built in filters. that should make it sound a lot better. doubt that this will help with the shutting off and your wiring on your speakers looks fine as long as your polarity +/- correct on all speakers

 

also noticed where your ground wire connects to the amp looks cut right next to the terminal and make sure none of the wire coating is inside the terminal. you might wanna recheck your main power connections for good contact in terminals. be sure you have good ground to the body of car, may need to scrape or sand paint to ensure good contact. also noticed your are using high level inputs so if you have a high power head unit then your gain will need to be turned to a much lower level than if using RCA cables which are low level inputs. if possible always use RCA cables as these outputs from the head unit are much clearer

 

the adjustments you will need to make to your filters should differ a little bit between your 4x6 and 6x9 speakers maybe your gain too as I would adjust for best quality sound more than for loudness

 

I have never heard of or seen an amp that allows you yo have LPF and HPF "on" at the same time, not on the same channel.

If you can set it per channel you MIGHT wanna set the 4x6's with HPF and 6x9s with LPF to actually get a little bass without sacrificing too much sound quality. Either way, nothing to do with over heating issue.

As for that, my money is on you having the outputs bridged, lowering the ohm-age which will kill most amps pretty quickly.