As Rgd said above, the micro-priced Tube-Dac from Scott-nixon.com is a minimalist, musical, tube output unit from the designer who originated the tube output concept in a consumer DAC. I bought a used Scott Nixon 1990's era Anodyne ATAS, and still find it outdoes many new flavor of the month DAC's, unless their price get stratospheric. His latest unit is able to outdo his previous work, and comes in a miniature package at a ridiculous low price. Both his customer service, and dedication to user satisfaction are amazing, even in our Audiogon universe with many outstanding vendors.