Before there were electric guitars the ways of altering the tone were rather limited, but it could be done, and it's drummed into you when playing Classical Guitar to consider this, so i'd just share it with you...
Sul Tasto = normal position, over the soundhole
Ponticello = right up by the bridge (Ponte = Bridge), much more trebley, as one would expect, but maybe you haven't given it too much thought on your acoustic playing, both strumming and picking.
I also sometimes strum right over the fretboard, I don't know what that is called, but it does give a superb sound for soft strumming.
There are 2 basic ways of plucking the string in Classical too, the Rest Stroke, this is used to bring out the melody line and the Free stroke which is pretty much a normal finger pick, so when you are playing something like a Fugue, the Rest stroke is the finger that highlights the melody, and the other fingers are doing the other 2 background lines..., it's pretty hard to do, but sounds great once learnt and looks easy as homemade apple pie, with custard.
This is only to let you know that there are loads of alternative tones available on your acoustic, that you might not have been aware of. I makes for a more interesting live performance.
Try it and let me know what you think...