Uberwaltz is correct; the amps are "mono" or mono block amps, which means each one drives only the respective speaker, Left or Right. They are not intended ever to be used individually for two speakers. Your dad had only the note regarding the Right amp, and you properly� discerned the Left one was the complement to achieve stereo. Good job!
Now, to have a bit of fun, you can "toe in" (swivel inward in place) or "toe out"(swivel outward in place) the speakers, and put them at different width from each other to achieve a variety of settings with the soundstage. The center image, or phantom image, created by the perceived joining of the two speakers' sound in the middle, can be adjusted to suit your taste. Do not be afraid to make such changes. Just be sure to turn off the system prior, and that the connections to amps and speakers are tight when you are done moving things around. The more symmetrical in placement relative to your listening seat (given a regular/symmetrical environment), the more perfect it will sound. Scroll through images of systems on this site under "Virtual Systems" and observe the different angles on speakers and placement relative to listening position. This influences the experience hugely. You will find your preferred arrangement over time. You most definitely do not have to replicate exactly� your father's adjustments to the system.
You can also tip the speakers back slightly (no need for extremes), i.e. 1/2" and see how that influences the sound. You will be surprised at the seeming large change in character due to a seeming small movement of the speaker. I prefer my speakers tipped back a bit as opposed to flat on the floor. This also is influenced by the position of the listening chair to the speakers. Experiment, have fun! Be like a "kid at Christmas"! :)
Now, to have a bit of fun, you can "toe in" (swivel inward in place) or "toe out"(swivel outward in place) the speakers, and put them at different width from each other to achieve a variety of settings with the soundstage. The center image, or phantom image, created by the perceived joining of the two speakers' sound in the middle, can be adjusted to suit your taste. Do not be afraid to make such changes. Just be sure to turn off the system prior, and that the connections to amps and speakers are tight when you are done moving things around. The more symmetrical in placement relative to your listening seat (given a regular/symmetrical environment), the more perfect it will sound. Scroll through images of systems on this site under "Virtual Systems" and observe the different angles on speakers and placement relative to listening position. This influences the experience hugely. You will find your preferred arrangement over time. You most definitely do not have to replicate exactly� your father's adjustments to the system.
You can also tip the speakers back slightly (no need for extremes), i.e. 1/2" and see how that influences the sound. You will be surprised at the seeming large change in character due to a seeming small movement of the speaker. I prefer my speakers tipped back a bit as opposed to flat on the floor. This also is influenced by the position of the listening chair to the speakers. Experiment, have fun! Be like a "kid at Christmas"! :)
