Haven't heard the wyred4sound amps, but I own a Pass X150 amp (prior to the newer .5 amps). I have compared this amp to many others - and it is the best I have heard. I would be surprised if the wyred4sound amps sound as good as the current Pass amps. Price wise though the Pass amps are much more, so the wyred4sound amps seem like great bang for the buck. Like to compare them sometime. Anyone around PA, DE, NJ MD with these we could compare!