I haven't noticed since I used mostly unbalanced and short length cables. But my logic says there would be more significant difference in the source to preamp section than pre to power. An integrated amp would basically show no difference unlike monoblocks in bimaping with a TT as source. A more complex system would be more influenced by balancing transmission lines than a blunt simple one. Logical?

I've tasted food made with the same exact dosage and materials but made by different chefs, in different kitchens with different methods. And it always tasted different. Analog sound is not just resistance, inductance and capacitance. There are craftsmen building those cables. In many ABX listening test people are fooled by coat hangers and what not. Nice party trick. However, It takes time and gusto to notice differences in YOUR hifi setup. Otherwise amps, cables, sources, even speakers, they all sound the same when your ears become clinical and cold. Just my 0.02$