HK Audio Linear Sub 1800 A 18 Inch Active Subwoofer option-title-Single Clamp the SS7747 is a perfect

the SS7747 is a perfect fit for subwoofers with both traditional pole cups or M20 threaded sockets

Analog I/O: Analog IN: Combo x2

High-impedence guitar input

XLR audio input to embed audio from your mixer

and 4 AES digital I/O

HK Audio Linear Sub 1800 A 18 Inch Active Subwoofer option-title-Single Clamp the SS7747 is a perfectHK Audio Linear Sub 1800 A 18 Inch Active Subwoofer The LINEAR SUB 1800 A is an 18 bass reflex subwoofer with plenty of low end. Unbridled power, high sound pressure of up to 132 dB and thumping bass all the way down to 38 Hz make this active sub the ideal add on for the LINEAR 3 mid high units when you really need a little more depth and loudness. It can also be used with LINEAR 5 mid high units or as a bass extension to the ELEMENTS BIG BASE system.