Eminence Delta-15B, 15"" Bass Speaker, Load capacity: 400 W RMS, 800 W peak, Impedance: 16 Ohms, Frequency range: 48 Hz - 4 kHz, Maximum sound pressure level: 100 dB, Overall diameter: 384.8 mm, Pitch circle diameter: 369.9 mm, Cutout diameter: 352.3 mm, Depth: 154 mm, Weight: 6.53 kg