... 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 time with stock opamps (TLE2141 Class A*2, BUF634U*2, dummy adapter*2 ... opamp rolling kit. (includes AD797*2, OPA604*2, TLE2141 Class A*2, BUF634P WB*2, BUF634U*2, Transistor BUF*2, Dummy adapter*4) iBasso ...