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P P.E.L. Concept PAC Panamax Panasonic PanaVise Paradigm Paradigm Reference Paradigm Signature Paradox Parasound pARTicular contemporary design Pass Laboratories Pathos PAudio Pegasus Audio Perpetual Technologies Perreaux Phase Technology Philips Phoenix Gold PhonoPreamps.com PhyZics Pickering Piega Pinnacle Pinnacle Systems Pioneer Pixa Placette Audio Plinius Audio Plus PMC PoGo! Polaroid Polk Audio Poly Crystal Polyfusion Audio Posh Power Modules Preference Premier Presence Primare Prisma Cable Prismiq Pro-ject ProAc Professional Technologies Proficient ProLine Prophile ProSolutions Proton Proview PS Audio PSB PSE PTS Pure Note Purist Audio Design

Q QSC QSonix Quad Quadraspire Quanta Technologies Quicksilver Audio

R Rackit RadioShack Rane Rave-MP RBH RCA RCA Discwasher RCA Lyra RCA Scenium Recoton Red Rose Music Redgum Reflection Audio Rega Rek-O-Kut REL Renaissance ReplayTV Revel Revox RF-Link RGB Spectrum Richard Gray's Power Company Rio River Cable Rives Audio Roberts Architectural Audio Rockustics Rogue Audio Rohrer Acoustic Design Roku Role Audio Rosinanté Rossman Audio Rotel RPM RTI Ruark Runco Russound