using a blaupunkt head unit 4x45 watt.
180 max watt speakers on rear shelf
450 watt coaxial speakers in door,

to stop the crackling and vibrations l have had to disable in built graphic eq and turn bass off on head unit,
car l have is a sierra sapphire

Get a subwoofer or at least better speakers, my 6.5s handle bass well enough to shake my mirrors.

It is a mystery why such a small space needs such audio power.

Unless you drive your car in order to impress on the rest of the world just how great a guy you are to be able to blast their peace by driving in their area.

either your amp[headunit] is clippingor your speakers are full of debree in the voice cone ..

Simply turning your music down would solve your problem and also stop you annoying the rest of us who actually do not want to listen to your choice of music.

is your amp producing more watts than your speakers are rated to handle? are the speakers bolted down firmly and is the ground wire firmly screwed down and the connector firmly crimped to the wire?

Hi,
You should be able to alter the sound settings on the radio front panel.
The Bass can be turned down, and should not be used on a high setting unless you have appropriate sub-woofers. Equaliser settings, You should also check the quality of the speakers, and replace them if neccercery, the manafacture is ones may not be a good as others that you can fit yourself, and it looks like you already have fitted some.
Regards
GDJ.

Your speakers seem up to the job providing they have not been damaged previously. If there is a crackling that is usually because the paper/fibreglass cone of the speaker is split, it needs checking.Otherwise, you need to make sure everything associated with the speaker and their mountings are fastened tight and insulated from touching the metal framework of the door etc.Vibration causes noise so you must eliminate the vibration.

l do not know just how much power (Amp.-Pre-Amps-Etc) you are using,but it sounds to me that you do not have enough power to drive your speakers,,,or you are using wiring that is too small to carry the power to them.

You need something to cut the low frequencies from the mid and high range speakers. Look for bass blockers or passive crossovers.

You can find bass blockers here. http://crutchfield.com/App/Product/Item/Main.aspx?g=761&i=127BB300A2&search=bass+blockers&tp=3216

something with a 300 or 600hz cut off would work well.

make sure all bolts and screws are tightened, dont turn the music up too loud and prolonged sun exposure can crack speakers, so if you park your car outside look for some shade or you might wanna lay a towel over them

u need to check that the output impedance of the stereo & the input impedance of the speakers match. For cars they r normally 6 ohms & they probably already match.

The next thing u need to check is that the speakers can handle the 45 watt output of the stereo.

If that is all okay then make sure u have decent wiring between amp & speakers.

Just as an afterthought the vibrating could be because the speakers r not in tight enough against the car door.

do not turn it on

Turn the volume down! 95% of people hate these berks who drive around with their stereos that loud they vibrate shop windows 100yds away!