All jokes aside, here are a few things to consider
- Your rig is not the most resolving rig out there...That almati with a 6 inch mid and dome tweeter crossed over higher than i would like is no resolution beast (compared to say, a Borresen, etc). It is a very pretty and "musical" speaker and you pay more for the pretty, i suppose. The Mac is no beast of detail, depth-wise nuance, etc. It is one of those flat soundstage amps (flatten everything out). Pair that with the fact that you have your speaker close to the wall, sub in the suboptimal location, etc...you reap what you sow. Ummm...couldn’t comment on your dac, never heard it, but, i would wager that it is not some king of detail like aavik, technics, etc, In summation, you probably won’t detect any soundfield nuance change, etc that can happen from a cable change. But, your goal probably was to have a "musical" (non hyper-detailed) setup and your rig probably accomplishes that... nothing wrong with that....
- A power cable is the the one cable you should spend the least on. After you put it through the conditioner, it’s only job is to reject noise until it gets to the component. It is the not the best cable to spend beacoup bucks on and can be accomplished for cheaper. The interconnects, speakercables, digital cables, etc can play a larger factor.
- I would also wager that any guy walking off the street to hear your rig is not some trained listener and golden ear bat...Sounds like poor quality test subjects to me.
Nevertheless, if cables didn’t do anything great for ya, count the pennies saved and have some happy listening sessions..... Tis a wonderful day indeed.