Rockville (4) RM68PRO 6.5" 800 Watt 8 Ohm SPL Midbass/Midrange Car Speakers 6.5 Open Basket Midrange Speaker. Power Rating: Peak: 200 Watts/RMS: 100 Watts. CEA Compliant Power Ratings. Kevlar Reinforced Black Pulp Cone. Treated Cloth Accordion Suspension. Linear Progressive Conex Spider. Kevlar Reinforced Pulp Paper Dustcap. High Tensile Expanded Steel Basket. Oversize 1.5 High Temperature CCAR Voice Coil. 90oz. Magnet Structure Weight . Impedance: 8-Ohm. Cutout diameter: 5.79". Mounting diameter: 6.16". Mounting Depth: 3.07. Frequency Response: 85Hz - 7 KHz. Sensitivity: 103dB @ 1w / 1m (4) Rockville RM68PRO 6.5&#034; Car Speakers Totaling 800 Watts Rockville RM68PRO 6.5 Open Basket Midrange Speaker Power Rating: Peak: 200 Watts/RMS: 100 Watts CEA Compliant Power Ratings Kevlar Reinforced Black Pulp Cone Treated Cloth Accordion Suspension Linear Progressive Conex Spider Kevlar Reinforced Pulp Paper Dustcap High Tensile Expanded Steel Basket Oversize 1.5 High Temperature CCAR Voice Coil 90oz. Magnet Structure Weight Impedance: 8-Ohm Mounting Depth: 3.07 Frequency Response: 85Hz - 7 KHz Sensitivity: 103dB @ 1w / 1m Cutout diameter: 5.79&#034; Mounting diameter: 6.16&#034; Mounting hole diameter: 4 holes- 0.217&#034; x 0.276&#034; REVC: 6.8 Ohm FO: 137.846 Hz SD: 13.685m M MD: 10.000 g BL: 8.342 T QMS: 3.650 QES: 0.892 QTS: 0.717 NO: 0.955 % SPL: 103 dB VAS: 3.364m M CMS: 126.497u M/N KRM: 2.447m Ohm ERM: 0.781 MMS: 10.538 g MMD: 9.618m Kg KXM: 19.741m H EXM: 0.591