The PS-8v has volume controls on channels 1,4,5 and 8, better for use with headphones of differing impedances. All outputs on all models are fully protected by a 10 ohm resistor.
An all-steel, RF shielded box houses one stereo jack input feeding 8 stereo jack outputs. The sockets are pcb-mounted, and there is an internal link to mono the unit. Used for example, for splitting headphone signals in music rooms, computer music recording systems and hi-fi systems, it will also work in reverse as a 8 into 1 passive combiner. Dimensions: 208x73x44. Weight 65g.