The Ferguson Hill bass & amp system is designed to acoustically & visually match the FHOO1 Loudspeakers, giving a seamless integration between the sub woofers & the horn speakers. The FHOO2 Bass Units come as a pair of clear acrylic spheres, with 300mm drive units & a distributed port loading. The Bass Amplifier enclosure is mirror-polished stainless steel, fully damped & its frequency response is set to complement the FHOO1 Loudspeaker.