JL Audio C3-650 Evolution C3 Series 6-1/2 convertible component speaker system These were bought in 2015 and used until 2018. They have been in storage since then. They work just fine and sound amazing. They are called convertible speakers because the tweeter can be either attached to the center of the woofer, or can be mounted away from the woofer yet still connect to the crossover, or you can remove the tweeter altogether like I did for rear speaker installations (i.e. rear fill). I do NOT have any grill covers for these. Overview: There are times when an installation calls for a separate woofer and tweeter and other times when a coaxial is the better approach. With the Evolution® C3 Convertible Component Systems, the same product can be deployed in either configuration, delivering outstanding audio power and quality in each application.The C3-650 system features 6.5-inch (165 mm) component woofers with oversized 1.2-inch (30.5 mm) voice coils, mineral-filled polypropylene cones and injection-molded polymer baskets. The woofer design benefits from JL Audios vast woofer design experience and advanced modeling systems.The C3 tweeters are built with 1-inch silk dome diaphragms that deliver powerful, extended response, on and off axis. Flush-mounting and surface-mounting fixtures are included to fit a wide variety of installation needs. They can also be mounted onto the woofers in a coaxial format using the included fixtures.C3 crossover networks are compact and built with premium component parts, including Mylar® capacitors and segmented air-core inductors. Four levels of tweeter attenuation are provided, as well as three levels of mid-range presence adjustment, for twelve possible voicing combinations!Sonic character: Clean and Powerful Specs:Continuous Power Handling (RMS) 75 WRecommended Amplifier Power (RMS) 25 - 150 W / Ch.System Efficiency 90.0 dB @ 1 W / 1 mSystem Nominal Impedance 4 ?System Frequency Response 48 Hz - 25 KHz ± 3 dB