I think pat nailed it, but didn't put the correct # of interconnects needed... since this goes between two components, so here goes:

Name of the commodity: Interconnects

The # of them in the stack: Since there are 6 channels from the SACD, or DVD-A, and the bass channel is being created by the ICBM, there are 6 inputs and 7 outputs, for a total of 13 channels in the short stack.

Why they are a short stack: hmm... the device will be little (short), and have a large number of wires "stacked" in it