I'm interested in connecting my amp (Halo A23) to my pre (Halo P3) so that when I turn on/off my pre (by remote) the amp (which does not include a remote) turns on/off, as well. In the manual for the A23, I see that I can connect a trigger wire, or "cable with a 2.5mm sub-mini plug on each end" to the 12V input of the amp and the output of the pre. This wire is supposed to be provided. But, as I bought the A23 used, it appears that this cable was not included.
Does anyone know a place where I might be able to pick up such a trigger wire? Would CC or BB have them? Or some other store?