The FiiO E11 is a high performance portable headphone amplifier built with advanced internal power supply and amplification circuitry. It can be used to enhance and improve the headphone driving capability of music players or mobile phones, providing high quality audio processing and amplification. The E11 can drive a wide variety of headphones, providing superior power output and enhanced sound quality.

Key Features and Benefits:
- Compact and light weight, easy to carry and use.
- User swappable high performance internal BL-5B Lithium Ion battery.
- Efficient low noise step-up regulator and high precision supply splitter for large signal swing.
- High current 3-channel amplifier design with low output impedance.
- Sealed ALPS analog volume control ensures low noise and excellent channel balance.
- Two levels of bass boost EQ to satisfy different listening tastes.
- High and Low gain settings for optimal driving of various headphones.
- High and Low operating voltage settings for different dynamics and characteristics.
- Self protection cuircuitry to auto shut-off and guard against headphone or hearing damage.
- Advanced charging capability for prolonged battery life.

What's Included:
- E11 Headphone Amplifier
- USB Charge Cable
- 3.5mm Stereo Line Cable
- Silicone Strap
- User's Manual

Specifications:
- Power Supply (USB Input): DC 5V, 500mA
- Frequency Response: 10 ~ 100kHz
- S/N Ratio: >=98dB
- Channel Separation: 60dB
- Gain: >=12dB (High); >=6dB (Low)
- Total Distortion: <0.009%(10mW)
- Max Power Output:
    High Voltage: 300mW(16Ohm); 200mW(32Ohm); 35mW(300Ohm)
    Low Voltage: 120mW(16Ohm); 88mW(32Ohm); 13mW(300Ohm)
- Charging Time: 200min
- Play Time: >10Hr
- Headphone Impedance: 16~300Ohm
- Input Impedance: >5kOhm
- Dimensions: 92.5mm x 54.2mm x 13.4mm
- Weight: 65g (including battery)

What's Included:
- E11 Headphone Amplifier
- USB Charge Cable
- 3.5mm Stereo Line Cable
- Silicone Strap
- User's Manual

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