Product Description DM™ 115 Plus SpeakerBass/mid-range, Sound Reinforcement /Musical instrument Reproduction Size: 15 Inch Impedance: 4 Ohms Power capacity: 900 W Peak 450 W Program 225 W Continuous Sensitivity: 93.6 dB / 1 W 1 m Usable freq. range: 37 Hz ~ 4 kHz Voice coil diameter: 2.38” / 60.45 mm Voice coil material: thermally bonded copper wire Kapton® former Net weight: 8.47 lbs. / 3.84 kg Znom (ohms) 4 Revc (ohms) 3.54 Sd (Square Meters) 0.0845 BL (T/M) 11.2 Fo (Hz) 47.6 Vas (liters) 118.1 Cms (uM/N) 109 Mms (gm) 102.4 Qms 15.10 Qes 0.869 Qts 0.821 Xmax (mm) 6.2 Le (mH) 0.396 SPL (1W 1m) 93.6 No (%) 1.42 Weight Unpacked: 6.83lbs (3.1kg) Weight Packed: 9.04lbs (4.1kg) Height Packed: 7.28" (18.49cm) Width Packed: 17.52" (44.5cm) Depth Packed: 18.11" (46cm)