My amp (by 2 users)

Yup, looks like someone who does not understand the quality of a Cambridge amp connected it wrongly, or with mismatched components.
Since you state that the Amp was very hot,It suggests that the Speakers hooked to the Amp were of a Higher Rating than what the Amp could Handle. That it worked for about an hour is credit to your machine.
In all likely hood. 1. The Power supply fuses are blown, and 2. The Audio Aoutput Transistors also.
can be fixed, but very expensive job, and only in the hands of the right Technician.