What is the “Slave” jack on the back of my Hiwatt?
A. The “Slave” jack on the back is an output, meant to drive one or more Hiwatt Slave amps. The Slaves were basically amp heads without most of the preamp circuit and no tone controls. The idea was you could use two or more amps/stacks but only have to adjust one set of controls. Note that this output is derived directly from the speaker output, so it contains the same exact signal that the loudspeakers get.
