• USB audio decoding and output for PC, functioning as a high quality external USB soundcard
• Texas Instruments’ PCM2706 serves as USB receiver. For better sound quality, a Wolfson WM8740 serves as digital-to-analog convertor (DAC), pairing with a high performance operational amplifier from ADI for the DAC circuit
• Build-in headphone amplifier utilizing AD8692 and Texas Instruments’ TPA6130A as pre- and power-amp for high performance, good resolution, low distortion, and powerful output
• Standard 3.5mm stereo line-in jack for portable amplification with conventional audio source
• Dual 3.5mm headphone output jack. Convenient design makes it easy to share music between two listeners
• World’s first portable headphone amplifier with dual colors OLED display
• Easy to use digital volume control function with great precision and channel balance
• Build-in EQ for 3 levels of Bass Boost
• Build-in rechargeable 1050 mAH Li-ion battery for 80 hours of continuous operation
• Specialized dock for connecting E9 to experience an even higher performance
• Quality anodized aluminum satin finish case design, small and compact, ideal to be wrapped together with digital audio player
• User selectable USB charging function to help prolong battery lifespan and lower distortion from power supply circuit
• User definable startup volume memory and maximum volume limiter to protect user from hearing damage due to loud volume
• Automatic keylock feature
• User definable sleep timer function and total runtime display.

• USB audio decoding and output for PC, functioning as a high quality external USB soundcard
• Texas Instruments’ PCM2706 serves as USB receiver. For better sound quality, a Wolfson WM8740 serves as digital-to-analog convertor (DAC), pairing with a high performance operational amplifier from ADI for the DAC circuit
• Build-in headphone amplifier utilizing AD8692 and Texas Instruments’ TPA6130A as pre- and power-amp for high performance, good resolution, low distortion, and powerful output
• Standard 3.5mm stereo line-in jack for portable amplification with conventional audio source
• Dual 3.5mm headphone output jack. Convenient design makes it easy to share music between two listeners
• World’s first portable headphone amplifier with dual colors OLED display
• Easy to use digital volume control function with great precision and channel balance
• Build-in EQ for 3 levels of Bass Boost
• Build-in rechargeable 1050 mAH Li-ion battery for 80 hours of continuous operation
• Specialized dock for connecting E9 to experience an even higher performance
• Quality anodized aluminum satin finish case design, small and compact, ideal to be wrapped together with digital audio player
• User selectable USB charging function to help prolong battery lifespan and lower distortion from power supply circuit
• User definable startup volume memory and maximum volume limiter to protect user from hearing damage due to loud volume
• Automatic keylock feature
• User definable sleep timer function and total runtime display.

Specifications:

• Output Power: 150mW (16Ω)16mW (300Ω)
• Headphone Impedance Range: 16 Ω ~ 300 Ω
• SNR: ≥95dB (A weight)on line-in ≥100dB (A weight)on USB-in
• Distortion: <0.009% (10mW)on line-in; <0.008% (10mW) on USB-in
• Frequency Range: 10Hz ~ 100KHz
• Power Supply: Rechargeable Li-ion battery
• Recharging: USB 5V DC 400mA
• Size: 96mmx55mmx15.5mm
• Weight: 100g

• Headphone amplifier
• 3.5mm interconnector cable
• Silicone band & Silicon case
• USB cable (ferrite core)
• Dual layer soft pouch
• User manual