Includes: 4x 8MB450-4 V2 8" MIDBASS LOUDSPEAKER The 8MB450-4 v2, 8" PRV Audio Pro Audio Mid bass Woofer offers smooth lower response through a punchy mid bass range and the frequency response that takes your applications smoothly through the 7,500 Hz range. The 2″ voice coil, durable spider suspension and the woven surround all supported by the sturdy steel basket ensures its ability to withstand long hours of operation without compromising efficiency of the speaker. A thick, yet light rigid cone ensures accurate response and power handling. The size and punch of this pro audio driver makes it perfect for a mid range driver in a 3 way loudspeaker cabinet or woofer in your studio monitor and even works great in home Hi-Fi installs. Also a great car audio woofer! GENERAL SPECIFICATIONS Nominal Diameter 8″ (203 mm) Nominal impedance 4 Ohms Rated AES Power Handling (RMS) 225 Watts Program Power 450 Watts Sensitivity 2.00V at 1m 93.5 dB Recommended Hi Pass Crossover** **For Full Power Handling 120 Hz** **12db Per Octave Crossover Frequency Response at -10dB 75 – 7,500 Hz Voice Coil Diameter 2″ (50 mm) Voice Coil Wire CCAW Voice Coil Winding Depth 12.0 mm Former Material Kapton Magnetic Gap Depth 6.0 mm Frame Material Stamped Steel