The new unit is available from June 29th, retailing at $2199 Stems beta will be available exclusively to PRIME 4+ users in the next 3 months.
My wild night with the Denon Prime setup – DJWORX
Denon DJ Prime 4+ Review - Hands-On Deep Dive
I'm so hyped for stems - DJ Lounge - Engine DJ Community
Denon DJ releases first-ever DJ controller using stem separation technology
Denon DJ Prime 4+ BX8 and HDJ-X5 Package Deal
Denon DJ introduces Prime 4+ controller with stem separation technology - Electronic Groove
Denon DJ announce the new PRIME 4+ 4-DECK Standalone DJ Controller
Prime 4+ Digital Dj Tips presentation! - News & Announcements - Engine DJ Community
Denon DJ SC5000: First Look At Denon's New Media Player - DJ TechTools
New units coming? : r/DenonPrime
Denon DJ announce the new stems-enabled Prime 4+
SerDj