Profile: Shahinian Acoustics Ltd. specializes in developing loudspeakers. Double eagle stereo subwoofer features a twin, back-to-back, hybrid transmission line/passive radiator bass chamber design with two 8 inch polypropylene curvilinear cone drivers. It features woofers with D.D. voice coils and 34-oz. It provides a built in 140 Hz/280 Hz 18 dB passive filters which may be bypassed for bi-amp operation and bridgeable into mono mode for double unit operation or stacked for quadruple high-power function.It sits on 4 twin-wheel casters. We also provide repair services.