AS-1+ is a self-powered 18" subwoofer in a bass reflex configuration. Due to the integrated ribs, safe stacking is possible when using multiple AS-1+s. AS-1+ is equipped with link out to one PS-1 (unamplified) when dual 18" systems are required. PS-1 is an AS-1+ without the amplifier module, and intended for use as a slave to the AS-1+ or for use with other amplifiers, giving the option to later upgrade with AS-1+.
(Lee Baldock)
