CEDIA 2019: JBL Synthesis Intros SDP-55 Surround Sound Processor, SDR-35 16-Channel AVR September 13, 2019 | Home / September 13, 2019 rave-video / CEDIA 2019: JBL Synthesis Intros SDP-55 Surround Sound Processor, SDR-35 16-Channel AVR CEDIA 2019: JBL Synthesis Intros SDP-55 Surround Sound Processor, SDR-35 16-Channel AVR