S86 Cone Loudspeaker The loudspeaker shall be a Bogen model S86 (or transformer-coupled S86T725 or S86T725BR), or equivalent, 8" cone-type loudspeaker, having a frequency response of at least 50 Hz to 12 kHz. Axial sensitivity shall be 95 dB, measured at 1-watt/4 feet. The loudspeaker shall have a 6 oz. ceramic magnet, a 3/4" inch voice coil, and a power handling capacity of 7W, minimum. Mounting holes shall be provided for attaching an optional transformer. Speaker depth shall be 3-1/4".