Skylab:
This must be the current king of tube headphone amplifiers -

CONSONANCE CYBER 30 VACUUM TUBE INTEGRATED / HEADPHONE AMPLIFIER
FEATURES:
Single ended Class A integrated amplifier and headphone amplifier
Russia made Electroharmonix 2A3 GOLD x 2 as output tubes
Russia made ECC83 dual triode as input and drive tube
Output tubes (2A3 GOLD) are directly coupled to the load
Extremely pure and musical
Detachable Power Cord System
TECHNICAL:
S/N RATIO:≥90db
OUTPUT POWER:3.5W x 2 RMS
FREQUENCY RESPONSE:10Hz-36Khz: -3db
INPUT SENSITIVITY:600mV
HARMONIC DISTORTION:<1% (1W, 1Khz)
POWER CONSUMPTION:86W
INPUT JACKS:RCA x 2 PAIRS
HEADPHONE JACK x 1
OUTPUT LOAD IMPENDENCE (SPEAKER):8ohms , 16ohms
OUTPUT LOAD IMPENDENCE (HEADPHONE):10ohm to 600ohms
DIMENSIONS : 320 (L) x 260 (W) x 150(H) mm
I would love to get my hands on this one!
