sa signature 5SA SIGNATURE 5 COMPACT SOUND QUALITY IN A CLASS OF ITS OWN SA Signature 5 is an elegant and versatile compact speaker that brings impressive sound quality and refined design into your home. This 2 way bookshelf speaker combines System Audios acoustic expertise with advanced technology to deliver a music experience that exceeds all expectations for a speaker of this size. With a tweeter that reproduces even the smallest details and a woofer midrange