Audio power amplifier mark R2 GP2 (in 2x 6L6), Level 2, 18 Watts in Class A single-stroke stereo amplifier with 5881 4x and 2x 6SL7 lamps connected in parallel, audio mark 100 kOhm input volume control for independent, without pre-amplifier, operation with a single linear source. Operating in pure class A, the single-stroke tube amplifier preserves the musical signal as a whole and, in terms of performance, radically surpasses most modern analogues. The P2SE audio note represents the entire criterion of the Level 2 Audio Note (UK).