Specifications: AvantGarde Valeraine active component is the world first optimized active crossover loudspeaker set for car. The Valeraine active component set contains 1 pair of 25mm silk dome tweeters,1 pair of 5.25 midbass and 1 active crossover unit. The materials used for each components are:25mm pure silk dome tweeter with neodymium motor structure.5.25 Injection polypropylene cone midbass with rubber surround, ABS basket and 1 ASV voice coil.24dB/oct Linkwitz Riley active crossover circuit board enclosed in anodized aluminum casing.1% resistors are used in all crossover programmable frequency modules. Valeraine active component speakers are installed in the last and most important link of a car audio system. The active crossover is installed between the head unit and amplifiers that drive each speaker directly. The tweeters are designed to work on/off axis on the dashboard of any car to create a soundstage matching the occupant ear level. The midbass can be easily installed in door or kick panels. All setting and frequency configurations of the active crossover are pre-optimized during production. Therefore this simplifies the end-user installation and tuning process.