Behringer DCX2496
First thing to do is to drill and mount the RCA jacks for the S/PDIF outputs. Because of the transformer isolation on the S/PDIF outputs isolated RCA jacks must be used. The Behringer rear panel does not have much free room so adding these to the left side of the Behringer when viewed from the front is one option.
The S/PDIF output board fits well to the left of the main processing board in the Behringer. Use several layers of 3m double sided extra strength foam tape to mount the board. 3 or 4 layers of tape should be plenty to make sure there are no shorts between the board and the chassis.
DACs used AKM AK4393
The relevant pins on the AK4393
Pin 3 = Master Clock
Pin 5 = BitClock
Pin 6 = Serial Data
Pin 7 = L/R Clock
Connections between the two boards
AK4393 3x S/PDIF output board
Pin 3 -> Pin 2
Pin 5 -> Pin 3
Pin 7 -> Pin 4
For those three connections above you only need to make the connection from any one of the three DACs to the 3x S/PDIF output board. Any location on the board that has continuity to those pins on the DACs is fine to tap into.
Pin 6 on each DAC is the serial data pin. Take pin 6 of one dac and connect it to pin 5 on the output board. Pin 6 of the second dac goes to Pin 6 on the output board. Pin 6 of the third DAC goes to Pin 7 on the output board. There are three surface mount resistors near the DACs (R3, R4, R5) which are good tie in points for the serial data for each DAC as shown in the picture below.
Lastly ground and power need to be connected to the output board. Pin 1 on X4 is ground. Pin 12 on IC1 is a source of +5v DC.
Then the 3x S/PDIF outputs need to be wired into the board. Because of the transformer isolation you must use chassis isolated RCA outputs. The ground of the RCA output must not have continuity with the chassis.
Configuration of the output board
Dip switch 2+4 need to be ON, all else OFF.
Behringer DCX2496 INSTALL
12/8/07
Installation information for 3x SPDIF Digital Output in Behringer DCX2496 digital crossover
The above picture shows possible tap in points for the clocks and serial data.
From Left to Right above
1 (white wire) goes to Pin 5 on the S/PDIF output, serial data 1
2 (white wire) goes to Pin 6 on the S/PDIF output, serial data 2
3 (blue wire) goes to Pin 2 on the S/PDIF output, Master Clock
4 (blue wire) goes to Pin 3 on the S/PDIF output, Bit Clock
5 (blue wire) goes to Pin 4 on the S/PDIF output, L/R Clock
6 (white wire) goes to Pin 7 on the S/PDIF output, serial data 3
This shows one of many possible tap in points for the connections. Any point that has continuity with the appropriate DAC pin is suitable to use.
In the picture at the top of the page the black wire is ground and the white wire all the way to the left is +5v DC.
NOTE: The Behringer runs all processing at 96/24 so the S/PDIF outputs will likewise always output 96/24.
