The CT Sounds TROPO65-4 is a 6.5” shallow midrange pro audio speaker designed to add mid-bass powerful enough to keep up with the loudest of SPL applications. The loudspeaker features a copper-clad aluminum (CCAW) voice coil which performs better than copper voice coils at middle to high frequencies. CCAW is also lighter than copper wire, therefore, allowing this speaker to have a higher sensitivity and be louder than copper wire at certain frequencies. Another unique feature is that this midrange speaker will fit in your vehicle's factory 6.5” speaker slots without having to alter any existing speaker slots in your vehicle. If you want to cruise 100 mph down the highway with the windows down and still have your music heard over the wind noise, then look no further than the CT Sounds TROPO65-4 6.5” shallow midrange speaker.