The side of the pod has two 3.5mm stereo jacks: one for headphones, and the other for auxiliary input. The auxiliary input feeds signal to the front two channels with +3 dB boost compared to the similar front channel (green) input jack on the ProMedia amplifier.
This pod is also compatible with the ProMedia Ultra 5.1, which was made from 2004 to 2008. (The Ultra version comes with a silver, horizontal control box, instead of a vertical black pod. The Ultra version has a single knob to make all adjustments, selectable by switches, rather than independent encoders).
The buyer may return a non-working ProMedia 5.1 control pod or box for a $25 core refund. This core refund can lower the net cost of this purchase. PirateShip offers discounted shipping labels, as does paypal.com/shiplabel