While I love the AMP4S I can’t help but hear the sound as a bit diffused. Amp4 and my Plenue2 are not so. This is with Campfire Audio Vega. Definitely not hating on this amp, I really like the sound. Listening to Sinatra as I am writing this, love it! Just a different sound. Maybe that is why the soundstage seems so large to me. Either way I am loving the sound. Hope you all have a great day!