Brief on the <a href="https://www.soundville.in/product/quadral-signam-series"> Quadral Signum Series</a> The quadral signum series is launched with four models out of the four, two canvas loudspeakers, a centre speaker to keep up with the idea of flexibility in cinema and stereo application, and one bookshelf loudspeaker. The SIGNUM 20 is the perfect representation of a shelf speaker system. The mini model of the floor-standing speakers is the Quadral Signum series 70, and the top model in the series is the Quadral Signum 90. The Quadral SIGNUM 10 makes up for the base centre speaker.