THE ACOUSTIC SUPPORTS FOR YOUR HIFI Where one of Quadraspire's HiFi racks is not an option, transform your furniture into a HiFi rack using a Qplus acoustic supports. HiFi components can produce and absorb energy that has a detrimental effect on sound. The Qplus acoustic supports are designed to mimic Quadraspire's racks that reduce resonance to deliver a clearer, cleaner musical performance. Please note that the Qplus is not designed for use under speakers. For speaker support please the the QX7 or QC sound enhancers.