Input: Gold-Plated Unbalanced Phono (RCA) Jacks Output: 1/4" Gold-Plated Stereo Headphone out Tube Options: 6JI - standard Frequency Response: 10HZ - 50KHz (-3 dB) THD+N: 0.2%: 1Vrms @ 1000Hz 0.6%: 3Vrms @ 1000Hz 1.0%: 5Vrms @ 1000Hz Signal-to-Noise: