Alpine Explorer

Alpine Explorer
Need car audio fitters thanks help please reply.?

So here's the deal that has a ford explorer 2002 to a system fewer small speakers, so I have the factory speakers, what was installed system power jl audio wedge speaker subwoofer is not the problem, the cover is installed desire a better quality chosen http://www.bestbuy.com/site/Alpine+-+45W+x+ 4 + + In-Dash CD + Terrace + To + Flip-Down Detachable + + Faceplate/9176198.p? id = 1218045946194 and skuId = 9,176,198 for my question is, is the Alpine deck is distorting the treble or voices in the smaller speakers or is it the speakers? I have this system set up in a shop, so I think they did a good job installing it, is only at the highest treble volume distorts the smaller factory speakers I have ever replaced. thanks for the help.

obtain new speakers in the doors. my guess is 6.5 "to their doors. get the alpine r type series. and a large crossover sound.