Main Features:
- ThreeChannel/ Four Channel compatible architecture
- Totally 8 gold-plated DIP sockets for OPAMPs and Buffers rolling
- 2-Setting Gain Jumper for impedance matching
- Powered by 12.6V Li-polymer battery pack, or external 16V power adapter
- 40 hours play timw with stock opamps (TLE2141 Class A*2, BUF634U*2, dummy adapter*2)
- High output power, 600mW+600mW into 32Ω
- High quality components, such as, gold plated PCB, ALPS volume pot, Nichicon cap, Vishay resistors, Switchcraft jacks.
- Measures 55*24*92mm, and weighs 156g
- Comes with power adapter, leather pouch, rubber feet, connection cable, warranty card, and opamp rolling kit.
(includes TLE2141 Class A*2, BUF634U*2,
OPA604*2, BUF634P WB*2, AD797*2, Transistor BUF*2, Dummy adapter*4)

Specifications:
Power Source：Built-in 12.6V Li-polymer battery pack or
16Vexternal power supply
Frequency Response: 10Hz~200KHz /-0.3dB
Signal to Noise Ratio：-110dB
Crosstalk: -101dB
Total Harmonic Distortion: 0.0015%
Output power: 600mW+600mW into 32Ω
Gain: 0dB/+10.5dB
Battery Life: 40Hours with stock OPAMPs
Battery Charge Time: 3 Hours
External Power supply: 16V DC
Recommended Headphone Impedance: 8~300Ω
Case dimension: 3.62L x 2.17W x 0.94H (inch)
92L x 55W x 24H (mm)
Weight: 156g or 5.5oz