JBL Speakers C508GTi

500W, / 125W RMS, IMPEDANCE 4 Ohms, Sensitivity (2.83V/1m) 88dB, Frequency response 58Hz - 21KHz, Anodized aluminuim Plus One woofer cone creating 30% more cone area to deliver higher efficiency and mid bass out put, Pure Titanuim 25mm edge-Driven dome Tweeter for crisp clear high frequencies with I-mount tweeter mounting system, Symmetrical Feld Geometry (SFG) motor technology with a new flux stablization ring designed to reduce distortion dramatically, NPC (Namex Polyester and Cotton) spider for high power handling and lower distortion, Heavy-duty cast aluminum vented basket to accommodate long suspension travel, increase power handeling and reduce magnetic field loses,       4th order Linquitz-Riley acustic outboard passive crossover, Mounting depth (drop in) 61mm, Cutout diameter 118mm