Just look at the boxes for half this stuff, quoting peak power for speakers instead of RMS, which is the equivalent of saying "This LED hits 50 watts for .00001 seconds during startup! Wow so amazing! (but don't look at the average 1 watt of output past that)"
The speakers, the cables, the AMPs, even digital source cables nearly all have 90% marketing budgets which drive up the price of many products without increasing quality at all.