carbon injection diaagmrubber surroundhigh quality silk dome tweeterdirectional tweeter (not on DC 302.2)red spiderhigh power magnethigh resistance black steel frameMidbass mm (inch) 237x164 (6"x9")Tweeter voice coil mm (inch) 26 (1")Power RMS/MAX (Watt) 45/90Impedance (Ohm) 4Frequency response (Hz) 55 ~ 20kEfficiency (dB) 92Midbass magnet weight (Oz) 20Depth mounting (mm) 79