With best-in-class audio and video signal integrity, 16 channels of native processing, Dolby ATMOS, DTS:X 3D, Auro 3D, IMAX Enhanced, Dirac Live, Logic16, Network Streaming, Dante, Roon Ready and Roon Tested status and Class G amplification; the SDP-55 delivers a powerful, sensory-rich experience with unrivalled flexibility.


  • 16 Channel Immersive Surround Sound Processor with Dante Stereo line inputs
    • Maximum input:4.5V rms
    • Nominal sensitivity: 1V, 2V, 4V (user adjustable)
    • Input impedance:47kΩ
    • Signal/noise ratio (A-wtd ref 100W) normal/stereo direct:100dB/110dB
    • Frequency response:20Hz—20kHz ± 0.1dB
    • Preamplifier outputs
    • Nominal output level (single-ended/balanced):1V RMS / 2V RMS (max. 5V RMS / 10 V RMS)
    • Output impedance:560Ω
    • THD+N (20Hz—20kHz):–100dB
    • Headphone output
    • Maximum output level into 32Ω:5Vrms
    • Output impedance:560Ω:<100Ω
  • General
    • Mains voltage: 110–120V or 220–240V, 50–60Hz
    • Power consumption (maximum): 50W (Thermal dissipation approx. 170 BTU/hour)
    • Power consumption (idle, typical): 40W (Thermal dissipation approx. 170 BTU/hour)
    • Power consumption (standby): <0.5W
  • Dimensions
    • W x D (including speaker terminals) x H (including feet): 433 x 425 x 171mm”
    • Weight (net):10.6kg
    • Weight (packed):13.9kg