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Distortion, that crackling you hear is caused from distortion. even though your speakers are rated for 150w max, all that means is that they can take a so called "kick" of 150w. the probably have an r.m.s. rating of 75w. When you turn your head unit up, if you listen to loud music you notice the louder it gets the more distorted (scratchier) it gets. That is because you are pushing that radio to the max. you can blow a speaker with too little power. you'll find about midway to 3/4 on the volume is the ideal for the loudest setting for the volume. replace the speaker(s) install a amp and put your volume to that spot and slowly turn the gain up to match the radio output. consult a stereo shop for a proper amp size, maybe look at upgrading your speakers.

i dont be attentive to I even have continuously repaired my very own audio equipment it value as much as a bottle of your wifes fingernail polish some paper towels and an outdated newspaper.....in basic terms take the busted part of the speaker and glue it mutually the wonderful you may with the fingernail polish after which take slightly information paper an positioned over the section you in basic terms glued then take extra suitable piece of paper towel approximately 2 time the size of the hollow and thoroughly conceal it in the nail polish and stick it over the information paper and enable dry ....I even have even bought a can of vehicle rubber undercoat in a can form of deal and sprayed it on a splash over all that to offer it a splash extra suitable strenth ....dont positioned to lots stuff on it tho or it truly is going to buzz badly nevertheless and the restoration wont final long

well first of all never go buy the max ratings of speakers...go by the rms ratings, which means the continuous power they can handle...

probably not, make sure wires are connected right

too much bass