LJ "MiniMax 7-5687" is the the most popular vacuum tube line pre amp, and the best-selling item within 10 years of the LJ Audio line products. Custom made only within 1-2 week. Budget range Rp3-4 million. See the article on Alex's Blog, www.audiotronika.com. Old stuff: here.
Model: M7-5687 #10 (June 2012).
Circuit: improvement version of "the legendary" AudioNote M7.
Circuit topology: classic anode follower, single-ended pure class A.