1 Replacement Midrange Speaker - 55 Watts, 8 OhmsThis 5" sealed back midrange speaker is a perfect replacement for many popular 3-way and 4-way loudspeaker systems produced during the last couple of decades. A great bolt-in replacement for several classic cabinets such as Cerwin Vega D9 Fully enclosed steel chassis does not require a separate enclosurePaper cone with paper surround for efficiency and extended range12 oz. ferrite magnet provides superior motor strength and high power handling capacityIntegral metal screen protects moving partsPRODUCT SPECIFICATIONS Power Handling (RMS) 30 Watts Power Handling (max) 55 Watts Impedance 8 ohms Frequency Response 600 to 10,000 Sensitivity 89 dB 1W/1m Voice Coil Diameter 0.75" THIELE-SMALL PARAMETERSResonant Frequency (Fs) 470 Hz DC Resistance (Re) 7.6 ohms MATERIALS OF CONSTRUCTION Cone Material Paper Magnet Material Ferrite MOUNTING INFORMATION Overall Outside Diameter 5.13" Baffle Cutout Diameter 4.13" Depth 2.25" # Mounting Holes 4 GRS 5SBM-8 5" Sealed Back Midrange Brand GRS Model 5SBM-8