iBasso P5 Falcon High-Definition Portable AMP with Power Supply Three Channel or Four Channel compatible architecture design. A total of 8 gold-plated DIP sockets for OPAMPs and Buffers allowing for opamp or buffer rolling 3 Gain settings for impedance matching Bass boost to enhance bass performance High output power, 660mW+660mW into 32 when powered by batteries, or 1000mW+1000mW into 32Ohm when powered by the P5 power supply