AVANTGARDE DUO OMEGA ( ALNICO )..... here are their characteristics...Frequency Response: 18Hz to 20kHz Note: 250 subwoofer amplifier Crossover Frequency: 170, 2000Hz Impedance: 18Ω Sensitivity: 107dB Midbass: 1 x horn Tweeter: 1 x horn Dimensions: 670 x 600 x 1595mm Weight: 81kg.....they are in excellent condition fully functional quality and highly collectible and rare and very little used.they have ALNICO units.they are ideal for amplifier lamps.they are available to people who know the type...sale price 12000 euro.....Please NO EXCHANGES - NO PASSENGERS - NO COLLAPSE...