SPECIFICATIONS S 503Height: 1220mm with Spikes/WasherWidth: 270mm with Spikes/WasherDepth: 380mm with Tipo: 3 vie da supporto, bass reflexAltoparlanti: Wf 18cm AS-XR cone, Mr 13cm AS-XR AL cone, tweeter JET 5cFreq. di crossover: 400/2,6k HzImpedenza: minima 4,8 ohm/120 HzSensibilità: 87dBPotenza amp..