Denon DJ PRIME4+ 4-Deck Standalone Dj Controller with Amazon Music. The PRIME 4+ brings a fresh new look and next-level features to the legendary proven performance power of the PRIME 4. The PRIME 4 + combines the powerful creative possibilities of 4 standalone decks with unmatched professional features and rugged build-quality to ensure solid DJ performances night after night and gig after gig. The PRIME 4+ boasts over 25 fully customizable Main FX and 4 dynamic, knob-controlled Sweep FX so that you can unleash your full creative mixing potential.