Ultra-Low Resonance Cabinet Design The Concept Centre uses GelcoreTM Cabinet Construction, where two layers of MDF, are separated by a bespoke, resonance absorbing, non-setting adhesive, which converts the kinetic energy and disperses it as heat. This substantially reduces distortion and allows the individual drive units to deliver their optimal performance; a pure and uncoloured sound. Simple to Drive, Simple to Position The Concept Centre is easily driven by any good quality amplifier, providing effortless peaks and crescendos in music and movies soundtracks. Alternative locations for positioning the speaker in the listening room are catered for by providing a foam bung which can be inserted in the rear-mounted reflex port modifying the bass response to suit positioning against a rear wall or in AV furniture. Accessories for Wall Mounting The Concept Centre can be wall mounted using Q Acoustics' elegant 'floating' glass shelf, the centre glass wall support.  Specifications: 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 Sold in: Single Finishes available: Lacquered Black Gloss / Lacquered White Gloss Warranty: 5 Years