Revel Performa3 M106 loudspeaker. "Kevin Voecks is a genius, no ifs, ands, or buts." I wrote those words nearly 30 years ago, in a review of the Mirage 750, where I had also recommended Mirage's 350 bookshelf model (footnote 1). The 350, which costs $300/pair, was the first affordable bookshelf loudspeaker whose sound actually excited me. Revel Concerta2 M16 is Harman’s midrange speaker solution that packs quite a punch. With a hefty amount of research from their engineers, a great manufacturing process, and top quality materials the Concerta2’s will not disappoint you if you’re looking for a warm yet accurate set of bookshelves. Straight off the bat, these speakers look.