[cuba0555]

If they are cutting off that means that their under powered. If I'm right they cut off when the bass hits. Am I correct? If so the amp your using is can't put out the power input of the speakers. The original wattage of speakers. OK! Just to let you know that a set a of speakers are rated to a certain wattage. Peak power and RMS power. Anything over peak the speaker might blow! Anything under RMS and you get the cut off. So if a speaker is rated at a 100 watts PEAK you want half!(50 watts RMS) But if the speaker is rated at a 100 watts RMS a go half the speakers will not work(PEAK will be about 200 watts). So make sure the amp can push about a little more then half of the peak power of all the speakers. It all depends on the kind of amp you are using to.It can be a mono amp for a sub or a multi-channel amp for a set of speakers or a sub. In my SUV I had two 4 channel amps for my 4 12" subs. Each sub has voice coils at 4Ω. But because each sub can have 2 channels and have voice coils I can bridge the sub to 2Ω .So I have adequate power at all times. There always a way to to get the right power just how you go about getting that power and how much to use is the tricky part. BTW when your done how about some pics.