If you are looking for a high-quality 4-inch speaker to replace a bad or blown speaker your car, the Pioneer TS-G1045R 4" 2-way Car Speakers is an excellent choice. Built with high-quality standards buying electronics is known for this little four-inch gem consists of a Injected Molded Polypropylene™ (IMPP) with MICA Cone Woofer.
The 1-3/16" Piezoelectric Tweeter offers very good power handling much better than the cheaper Mylar tweeter speakers in this price range are known for. Pioneer and other less than ethical websites out there will tell you this speaker holds 210 W of power! That is not the case don't take that type of power near any speaker of the size in real world watts the speaker will hold about 30 watts RMS perhaps a little more if use with a high pass filter or capacitor.
Unlike many OEM speakers, the Pioneer TS-G1045R feature Pioneer’s extremely strong and lightweight Injected Molded Polypropylene (IMPP) with MICA composite cone woofer, for improved sensitivity and reduced distortion. This type of materials is also very good at dealing with harsh weather such as high-level of salinity and or direct sun radiation.