Where one of our HiFi racks is not an option, transform your furniture into a HiFi rack using a QPlus acoustic interface. HiFi components can produce and absorb energy that has a detrimental effect on sound. Our QPlus acoustic interfaces are designed to mimic our 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 use our QX7 or QC sound enhancers. MORE .