For the video setup guide, follow the video here
You will need:
MixAmp USB Power Cable, Optical Cable, and Inline mute cable.
First, ensure the MixAmp Pro has the most recent firmware installed. Ensure the MixAmp is connected to the USB Port on your PC in order to update it on your PC.
Connect the MixAmp Pro to your PS3. Insert the MixAmp USB Power cable to the front USB Port and connect the Optical cable to the MixAmp USB port and PS3 optical connection located on the rear.
Next, turn on your PS3 and wait for it to load to the home screen.
Navigate to the “Accessory Settings” and continue to “Audio Settings” and make sure your input and output devices are selected to “Astro MixAmp”.
Next, scroll down and select “Sound Settings”. Under Sound settings, select “Audio Output Settings” and select “Optical Digital”. Make sure “Dolby Digital 5.1 Ch” is selected.
Connect your A40’s to your MixAmp by plugging the Inline mute cable into the headset, and the other end of the cable into the port on the MixAmp with the headset icon.
You are now ready to use your A40’s on the PS4.