OUR PART # IMP-100DL-WH
High quality auto-former design, 1 to 8 speaker pairs, switchable impedance matching 2x, 4x or 8x positions and stereo non-impendance matching 1x position. Soft touch 12-step slide attenuation. Frequency response: 20Hz to 20kHz, removable terminal blocks accept up to 14-gauge wire. Mounting requirements: fits all single-gang backless P-rings or 19 cubic inch minimum electrical work box. Mounting dimensions (WxHxD): 1.63"" x 2.74"" x 2.66"" (42mm x 70mm x 68mm).