No Audiomeca CD player has tubes in its output stage. But Audiomeca used to sell a tube output device for its CD players and DACs called the "Tube Extension" for about $1,000. The Obsession was their cheapest CD player, and a Mk. II version was later released that was about 8% better at a higher premium. The overall sound of this player is very natural, "musical." With the tube extension, the Obsession will gain in warmth and naturalness and lose in frequency extreme linearity. I do not think the tube extension was designed for the Obsession, but for the more expensive and more analytic Ambrosia DAC and Talisman integrated. BTW, the tube extension is now discontinued and hard to find, I believe.
