Little Dot MKIV MK4 JAN5654X2 Soviet 6H30EHX2 Headphone Tube Amplifier + Pre-Amplifier adds in user-tweaking options such as two gain switches to delivery maximum compatibility with all your headphones, regardless of impedance or sensitivity. Also available for the very first time in a Little Dot amplifier, is an internal jumper to allow use with a wider range of driver tube-rolling, including the EF92, CV131, WE403A/B, GE5654, M8100, CV4010, EF95, 6JI as well as all equivalents, derivatives, and direct replacements to these vacuum tubes!

TECHNICAL SPECIFICATIONS:
SEPP (Singled-ended Push Pull) OTL in Class-A
Frequency response: 10 hz~100 Khz (-1dB)
THD+N: 0.1% (100 mW @ 300 ohm)
Power Output:
500 mW @ 300/600 ohm
300 mW @ 120 ohm
100 mW @ 32 ohm
Power Consumption: 30W (228V x 0.133A)
Variable Gain: 3,4,5, or 10x
Recommended Load Impedance: 32 ohm~600 ohm
Input Impedance: 50K ohms
Pre-Amplifier Output Impedance: 600 ohms
Pre-Amplifier Gain: 3-10x (also controlled via gain switches)
Pre-Amplifier Voltage: 10V RMS
High quality aluminum chassis
Available in either 120VAC or 220VAC