iBasso Audio PB6 MACAW Balanced Portable Tube Amp Headphone Amplifier

SPECIFICATIONS
- Maximum Output Power (Battery): 1600mW @ 32 Ohms (4.4mm BAL), 660mW @ 32 Ohms (3.5mm SE)
- Maximum Output Power (DC 12V): 2300mW @ 32 Ohms (4.4mm BAL). 660mW @ 32 Ohms (3.5mm SE)
- Output Impedance: 1.2 Ohms (4.4mm BAL), 0.5 Ohms (3.5mm SE)
- Battery Life: Up to 13.5 hours (Class AB / BAL output / high gain / low bandwidth)
- Size: 140.7 x 78.9 x 19.6 mm
- Weight: ~293g


IN THE BOX
- PB6 amp
- USB Type-A to USB Type-C charging cable
- DC 12V power supply
- 4.4mm - 4.4mm BAL interconnect
- 3.5mm - 3.5mm SE interconnect
- Carrying pouches
- Documentation


- Four military-grade JAN6418 tubes by Raytheon implemented in a 4-channel fully balanced amplification architecture imparts a rich, warm tube character for a natural listening experience
- Four BUF634A OP+BUF headphone amplifier circuit offers enhanced resolution and excellent dynamic range with the Class AB output mode
- 8.4V high-voltage battery pack improves power efficiency and transient response capabilities by minimizing ripple interference, resulting in a purer and more stable power supply enabling faithful reproduction of musical nuances and dynamic range
- External 12V DC power supply support allows for a greater power output or 2300mW per channel at 32 Ohms, and an increased voltage swing of 24V, enabling the PB6 to effortlessly power full-size headphones and achieving performance comparable to quality desktop-grade headphone amplifiers
- Choose between excellent transient response with superior control and resolution or a softer, warmer soundstage with a selectable high & low bandwidth output stage
- Supports both 3.5mm single-ended and 4.4mm balanced input and output


Four Military-Grade JAN6418 TubesThe PB6 Macaw utilizes four military-grade Raytheon JAN6418 directly heated pentode tubes in a fully balanced, 4-channel amplification design. Its custom 22.5V anode power supply delivers exceptional headroom and dynamic authority, while each tube is meticulously tested and matched using APX555 equipment to ensure perfect channel balance and consistency. The result is a rich, warm, and natural tube sound, powerful yet effortlessly musical. 


Higher Efficiency + Purer PowerThe PB6 is powered by an 8.4V high-voltage polymer battery pack, boosting efficiency and transient response. Compared to standard 3.7V designs, it reduces ripple interference from DC-DC conversion, delivering purer, more stable power for faithful reproduction of musical nuances and exceptional dynamic range, far beyond typical portable headphone amps.
High-Precision 4-Channel Volume ControlThe amp is equipped with a high precision 4-channel volume control IC — NJW1195A — which offers fine adjustments with 0.5dB per step. This hardware-based volume control not only allows for precise volume control but also helps to inherently reduce background noise, resulting in a pitch-black background. PB6 ensures consistent left-right channel balance throughout the entire volume range, delivering a more accurate and reliable listening experience. 


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Beyond The Music