Below is my review of the Virtue Audio Sensation M451 as a possible amplification source for difficult-to-drive BALANCED headphones.  This review is only the headphone part of a comprehensive 2-part review that is scheduled for later publication.  The speaker portion of the review was done...

I'm hearing really good stuff about Virtue Audio gear. They have a bunch of integrated stuff and its not real expensive-anybody hear these pieces??  Ed L.