Mid/bass driver: 165mmTreble unit: 28mmFrequency range: 55Hz - 30kHzNominal impedance: 6ohmsLowest impedance: 4.7ohmsSensitivity: 84dBRecommended amplitude power range: 25-200wCrossover frequency: 2.5kHzDimensions: W/H/D 220 x 355 x 400mmWeight: 14.5kg (each speaker)