Q Acoustics Concept Center Channel Speaker (Gloss Black) The Concept Center is a precisely optimized implementation of the Gelcore cabinet technology used in the Concept 20 and 40, in order to bring the highest quality performance from this key Home Cinema component. This ultra-low resonance and beautifully lacquered cabinet design with magnetic grille allows the dual 105mm drive units and wide dispersion 25mm tweeter to perform at their very articulate best. Enclosure type: 2-way reflex Bass Unit: 2 x 100mm Treble Unit: 25mm Frequency Response: 75Hz - 22kHz Nominal Impedance: 6ohm Minimum Impedance: 4ohm Sensitivity: 88dB Recommended Power: 25 - 75w Crossover Frequency: 2.9kHz Dimensions H/D/W mm: 150 x 198 x 430 Weight: 6.8kg 1 x Concept Center Speaker 1 x Magnetic Speaker Grills 1 x Port Bungs 1 x White Cotton Speaker Handling Gloves 1 x User Manual 3 x Rubber Speaker Grips The  Concept Center is the heart of the Concept Cinema System. This  new  loudspeaker boasts a precisely optimised implementation of the   revolutionary &#039;Gelcore&#039; cabinet technology developed for the ground   breaking Concept 20 and Concept 40 models. The result is a center   channel speaker that delivers astonishingly clear and dynamic dialogue. Enclosure  type: 2-way reflex, Bass Unit: 2 x 100mm, Treble Unit:  25mm, Frequency  Response: 75Hz - 22kHz, Nominal Impedance: 6ohm, Minimum  Impedance:  4ohm, Sensitivity: 88dB, Recommended Power: 25 - 75w,  Crossover  Frequency: 2.9kHz, Dimensions H/D/W mm: 150 x 198 x 430