i got these from UK when traveled there for a audio show. Never used them as I got the white installed.
With Q Acoustics' new 'Concept Centre' and 'Concept 5.1' Cinema Package,
movie lovers can now experience soundtracks and dialogue with the same
unparalleled sonic clarity that audiophiles enjoy from their
award-winning Concept stereo models.
This outstanding level of performance is achieved because the 'Concept'
models incorporate 'Gelcore Construction' loudspeaker cabinets. This
ground breaking technology, developed by Q Acoustics, almost totally
eliminates loudspeaker cabinet resonance - a major factor limiting the
sonic performance of modern loudspeakers.