The Programme 30 uses Wharfedale proprietary bass units with fabric dome tweeters to produce extended bass, even at high volume levels & a smooth high frequency response. The crossover features TOP™ (Tweeter Overload Protection) while allowing a full 100W of power handling. The 30T version incorporates a 100V line transformer with taps for 10, 5, 2.5 & 1.25 watts, selected by using a rear panel switch. • System type 4.5" 2-way passive • Frequency response +/- 3db 50 Hz- 20 K Hz • Sensitivity (db 1w@1m) 86d B • System impedance 8 ohms • Maximum SPL Peak d B 106d B