KEF reference series model r107 speaker pair. These speakers were professionally rebuilt last month by Van L Speakerworks in Chicago. They the top of the line speakers by KEF prior to the current model 207. They produce a frequency response of 20Hz-@20)kHz with a maximum output of 112db at 4 ohms resistive. Suitable for use with amplifiers in the range of 50-300 watts into 4 ohms. Sturdy cabinets with premium audio connections. Size 45.9 h x 13 w x 17.6 deep. They feature two coupled 10 inch woofers per cabinet. The top speaker array is removable and rotates to accommodate the listening arena. John's rebuilt process features custom foam surrounds, non-hardening adhesive and audio centering of all components while the adhesive dries. Spyders and coils are also gone through and repaired or replaced as necessary. Speakers are 10 inch not 12 . I also have the Kef kube 107 bu am missing the cable.