d&b audiotechnik 21S-SUB 21-Inch Passive Subwoofer - Weather-Resistant 100327624 Nominal impedance: 16 Ω

Nominal impedance: 16 Ω

and features an all-new Think Tank-designed interior that's fully customizable with repositionable Velex-covered foam pads to ensure a perfect fit - even if your gear changes

Furman's Symmetrically Balanced Power provides an invisible noise floor

Command section

d&b audiotechnik 21S-SUB 21-Inch Passive Subwoofer - Weather-Resistant 100327624 Nominal impedance: 16 Ωd&b audiotechnik 21S SUB 21 Inch Passive Subwoofer Weather Resistant The 21S SUB is a high performance subwoofer for use with the xS Series and xA Series loudspeakers and is intended for a wide range of permanently installed applications. The cabinet houses a single long excursion 21" driver in a bass reflex design. The large, specially shaped reflex port enables the 21S SUB to achieve high Sound Pressure Levels from a cabinet with a small footprint.