JBL Synthesis

SDP-45 4K

Surround Sound Preamplifiers

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Designed for those seeking the ultimate in audio and video performance, the JBL Synthesis® SDP-45 4K surround processor/controller provides the highest level of sonic performance available while offering pristine video with flawless HDMI® switching. With 24-bit/192kHz A/D and D/A converters and two 32-bit floating-point DSP engines, there is no shortage of processing power for decoding the latest lossless audio.

Featuring eight HDMI inputs and two HDMI outputs, extensive analog and digital audio inputs and outputs, and a USB connector to provide computer sound-card functionality, the SDP-45 4K is perfectly suited for complex home theater systems and even includes an independent second audio zone.

HDMI technology offers uncompressed multichannel sound both from Blu-ray™ players and from popular computer-based sources that can provide high-resolution audio. The choice of processors for HDMI audio is critical, since audible artifacts resulting from digital “jitter” are common. The SDP-45 4K solves the problem by providing a completely asynchronous signal path from its A/D converters and all digital inputs, allowing the outputs to be completely buffered and internally clocked to a very stable crystal oscillator. This sophisticated approach provides sonic clarity and a lack of “grit” that truly reveals the potential of today’s uncompressed Blu-ray and high-resolution digital sources, and it optimizes legacy analog sources.

The broadcast-quality HDMI switcher provides smooth audio and video switching, can pass digital video up to 1080p, 12-bit, and is compatible with 3D video formats.


• 7.1-channel digital surround processor

• 4K HDMI Switching on all 8 HDMI inputs
• Dolby® TrueHD & DTS-HD Master Audio™ decoding
• 8 HDMI inputs, 2 HDMI outputs
• 9 digital inputs, plus USB 1.1 type B for sound-card functionality
• 8 pairs of analog inputs and both balanced and unbalanced analog outputs
• RS-232 and Ethernet control capability
• Includes rack ears and fastener hardware (requires 3 rack spaces without feet)
• Dimensions (H x W x D): 6.3" x 17" x 15.5" (16cm x 43.2cm x 39.4cm)
• Weight: 24 lb (10.9kg)


Description 7.1-channel digital surround processor
Dolby Modes Dolby True-HD; Dolby Digital Plus; Dolby Digital; Dolby Digital EX; Dolby Pro Logic2x; Dolby Volume
DTS Modes DTS Master Audio; DTS Express; DTS; DTS Neo6
Additional Modes Analog Bypass; AAC (MPEG4 and MPEG2); WMA Pro; MP3
Audio Resolution Capability 192kHz / 24 Bit; up to 8 Channels
Digital/Analog Conversion 192kHz / 24 Bit
Analog Audio Inputs 6 (Stereo) RCA pairs; 2 (Stereo) XLR pairs
Digital Audio Inputs HDMI (8); Coax S/PDIF (4); Optical (3); USB; AES/EBU (2)
External Multichannel Input 7.1, unbalanced RCA
Video Inputs 8 HDMI; Supports all 3D video modes and Full HD up to 36 bit color
Main Audio Outputs Balanced XLR and Unbalanced RCA; 7.1
Additional Analog Audio Outputs Zone 2 (RCA Stereo); Headphone; Main Aux (Stereo L+R)
Additional Digital Audio Outputs Coax S/PDIF; HDMI Audio Pass Through or Downmix
Main Video Outputs Dual Output HDMI with Auto Video Resolution Detect Switching
Communication and Control RS232 and TCP/IP (2-way); 3 Trigger outputs; 1 Trigger input; Rear Panel IR; Front Panel IR
Frequency Response 20Hz to 20kHz +/- 0.25 dB
Signal-to-Noise Ratio Not less than 100dB in all modes; 110dB in Analog Bypass Mode (Ref. 1V input, maximum gain)
Total Harmonic Distortion (THD) (20Hz to 20kHz at 2V output level): Less than 0.006% in all modes; below 0.0013% in Bypass mode.
Maximum Output Level 8 Vrms (16 Vrms Balanced) in DSP Modes; 10 Vrms (20 Vrms Balanced) in Bypass Mode
Output Impedance 110 Ohms
Power Requirements 110v/60hz; 230v/50Hz, Line Voltage set for Destination Country
Power Consumption 65 Watts Max / >0.5 Watts (low power standby)
Height 6.3" (16cm)
Width 17" (43.2cm)
Depth 15.5" (39.4cm)
Weight 24 lb (10.9kg) Shipping Weight; 18 lb (8kg) Unit Weight
Included Accessories Includes rack ears and fastener hardware (requires 3 rack spaces without feet)



SDP-45 Limited Warranty Sheet
SDP-45 Safety Sheet
SDP-45 User Guide and Setup Manual
SDP-45 Crestron Module V3r2 and Demo Program. Posted October 13, 2013.
SDP-45 External Serial Control Protocol rev1.04
SDP-45 Rear - Unit with measurements (jpg file)
SDP-45 Front - Unit with measurements (jpg file)
SDP-45 Rear - Unit with measurements (DWG file)
SDP-45 Front - Unit with measurements (DWG file)
JBL Synthesis SDP-45 Brochure
SDP-45 Remote Control User Guide


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