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JBL SYNTHESIS SDEC-3500/SDEC-4500

JBL SYNTHESIS SDEC-3500/SDEC-4500

Rear Panel Connections

REAR PANEL CONNECTIONS

H  

POWER CORD SOCKET: 

Connect the power cord here and then connect to to a mains 

output with voltage from 85V to 270V, 50/60Hz.

I

   LOCATE: 

Press this button to illuminate the Locate button on the front and identify the device 

within the London Architect software.

J

   RS-232: 

This connection for external calibration and configuration unit is not active at this time.

K

   ETHERNET: 

This is the main connection for the proprietary system control network, and for 

third-party Ethernet control. The SDEC must be connected to an Ethernet hub during the 

calibration process. 

L

   BLU-Link CONNECTORS: 

Connect these ports to other SDEC-4500P and SDEC-4500X 

products to enable BLU-Link to send and receive audio data. Please Note: When using the 

SDEC-4500X or SDA Series amplifiers with BLU-Link you must connect the two units through 

the BlueLink connection, using a  

Cat. 5e patch cable.

M

  CONTROL INPUTS:

 The SDEC-4500P can be configured for full-range or bi-amp operation 

by using these control inputs. The SDEC-3500 does not need or use this connection.

N

  INPUT/OUTPUT CARD POSITIONS:

 These connectors provide the balanced and unbalanced 

connections for the input/output card fitted in the four card slots in a JBL Synthesis SDEC 

device. A green LED next to the slot assignment letter A, B, C or D indicates that an input 

card is fitted and an amber LED when an output card is fitted. The analog connections are 

balanced/unbalanced, on Phoenix/Combicon connectors. Depending on which model and 

configuration you have purchased will determine which input/output card has been installed 

at the factory. Please make certain that you have ordered the correct wiring kit for your 

application and system configuration as designed and recommended by JBL Synthesis.

BlueLink

H

I

J

K

L

M

N

Input/Output Assignments

INPUT/OUTPUT ASSIGNMENTS

SDEC-3500

The SDEC-3500 supports up to 7.1 input with up to 7.1 output. The input and output 

assignments are described in the table below. You must make the correct connections from the 

surround processor output to the amplifier input for the system to work correctly.

The correct Synthesis Interconnect kit includes all the necessary connections for using the SDEC 

in the Synthesis system. 

CONNECTION NOTES

•   Please follow the Input/Output Assignments table for correct connections.

•   You will need to use the Ethernet network port on the rear panel of the unit for the final 

calibration process. You can connect the SDEC-3500 through any standard Ethernet hub.

SDEC-3500 INPUT/OUTPUT ASSIGNMENTS

Surround Processor to SDEC-3500 Inputs

Number

Channel

SDEC-3500

1

Left Front

A1

2

Right Front

A2

3

Center Front

A3

4

Left Side

A4

5

Right Side

B1

6

Left Rear

B2

7

Right Rear

B3

8

Subwoofer

B4

SDEC-3500 Outputs to Amplifiers

Number

Channel

SDEC-3500

9

Left Front

C1

10

Right Front

C2

11

Center

C3

12

Left Side

C4

13

Right Side

D1

14

Left Rear

D2

15

Right Rear

D3

16

Subwoofer

D4

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