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FiiO E7 portable headphone amplifier with USB audio decoder (DAC). This product is designed to replace PC on board sound card that do not have enough output power for higher-end headphone. With USB audio decoding, amplification and audio output, E7 can serve as both a professional headphone amplifier as well as an external USB sound card. This is an Amazon’s product review. Checkout more details bellow.

http://cdn4.thetechjournal.net/wp-content/uploads/images/1109/1316341849-fiio-e7-usb-dac-and-portable-headphone-amplifier-1.jpg

Product Features:

  • Ultra low-noise and low distortion headphone amplifier design with 60-step digital volume control
  • High accuracy USB DAC for optimal music playback from a computer
  • Long 80+ hour battery life for week-long use without recharging
  • Advanced features 3-stage bass boost EQ, sleep auto-off, max volume setting
  • Stylish and rugged: OLED color display, brushed aluminum case, silicone skin case

- TI PCM2706 USB receiver, 48kHz 16-bit support for Windows XP/2000/Vista/7 and Mac OS
- Wolfson WM8740 DAC, ADI AD8692 OP Amp and TI TPA6130A Power AMP
- High performance, excellent resolution, low distortion, and powerful output
- Standard 3.5mm stereo line-in jack for portable amplification with analog audio sources
- Dual 3.5mm headphone output jack makes it easy to share music between two listeners
- Dual color OLED display with automatic key lock and sleep timer function
- Noiseless digital volume control with 60-step precision and perfect channel balance
- 3-level bass boost EQ, user definable start up volume and max volume limiter
- Specialized dock connector for use with E9 desktop amp for even higher performance
- Anodized brushed aluminum case, small and compact, strap to portable audio player
- User defeatable USB charging for lower distortion
- Build-in rechargeable 1050 mAH Li-ion battery for up to 80 hours of continuous use

Specification:
- Output Power: 150mW (16?); 16mW (300?)
- Headphone Impedance Range: 16? ~ 300?
- Signal to Noise Ratio (A Weighted): ?95dB Line In; ?100dB USB
- Distortion (10mW): – Recharging: USB 5V DC 400mA
- Size: 3.8″ x 2.2″ x 0.6″
- Weight: 3.5oz

Note: Due to the USB spec restriction on digital audio format. This device only support up to 48kHz / 16-bit USB decoding function.
That’s all about the FiiO E7 USB DAC. This Portable Headphone Amplifier is available in Amazon.com. You can directly order or buy from here.
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  On September 18, 2011(2 years, 10 months ago.)

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