Up for auction are the duo of headphone amplifiers that are used in conjunction in a desktop environment to enhance and boost the sound of headphones.  I used with my AKG K701 over-the-ear headphones.

The units are the FiiO E7 USB DAC and Portable Headphone Amplifier & the FiiO E9 Desktop Headphone Amplifier.

The units both work great and have original boxes and accessories.  The FiiO E7 unit has some dimming on the display which makes it a little difficult to see the volume level but it has no impact on the functionality of the volume.  When used combined on my desktop, I would set the volume on the E7 and then control the volume from the E9 unit which has a knob style turn volume.

These are pricey units (The E7 sells for $499 new on Amazon and the E9 sells for $249 new on Amazon) but I no longer have a need for them so I will be selling auction style to the highest bidder - I will have a low starting point for the pair.

Please email me with any questions.

Thanks and Happy Bidding!!


FiiO E7 Overview

The E7 USB DAC Headphone Amplifier from Fiio is a compact headphone amplifier that provides analog and digital input and output for high-quality listening. It offers USB audio decoding and output for PC, functioning as an external USB sound card. It has a USB receiver from Texas Instruments, a Wolfson digital-to-analog converter, and an ADI amplifier to offer exceptional audio quality with low distortion and strong output.

The amplifier has a standard 3.5mm line input for compatibility with a variety of music players, laptops, and other devices. It also has a pair of 3.5mm outputs so you can connect 2 pairs of headphones or earbuds simultaneously. The amp has a digital volume control for excellent precision and balance. There is also a built-in EQ that provides 3 levels of Bass Boost.

The E7 has an anodized aluminum satin finish case for looks, durability, and minimal weight. It also has a dual-color OLED display for clear readouts. The integrated rechargeable Li-ion battery provides up to 80 hours of continuous operation so you can listen for days without recharging.

The E7 has a number of user-selectable functions, including a selectable USB charging function to prolong battery life, as well as a definable startup volume memory and maximum volume limiter to help prevent hearing damage due to loud volume levels. There is an automatic keylock feature to prevent accidental changes, plus a sleep timer function that's ideal for use at night.

Provides analog and digital input and output for high-quality listening
Offers USB audio decoding and output for PC, functioning as an external USB sound card
It has a PCM2706 USB receiver from Texas Instruments, a Wolfson WM8740 digital-to-analog converter, and an ADI amplifier to offer exceptional audio quality with low distortion and strong output
Uses an AD8692 and a Texas Instruments TPA6130A for pre and power amps for pro-level audio performance
There is a standard 3.5mm line input for compatibility with a variety of music players, laptops, and other devices
A pair of 3.5mm outputs let you connect 2 pairs of headphones or earbuds simultaneously
The digital volume control offers excellent precision and balance. There is also a built-in EQ that provides 3 levels of Bass Boost
The anodized aluminum satin finish case provides looks, durability, and minimal weight
A dual-color OLED display provides clear readouts
The integrated rechargeable Li-ion battery provides up to 80 hours of continuous operation so you can listen for days without recharging
A special dock lets you connect the E7 to an E9 desktop amplifier (sold separately) for enhanced performance
A USB port provides driverless compatibility with Mac and Windows computers, as well as USB recharging
User-selectable functions include a USB charging function to prolong battery life, as well as a definable startup volume memory and maximum volume limiter to help prevent hearing damage due to loud volume levels. There is an automatic keylock feature to prevent accidental changes, plus a sleep timer function that's ideal for use at night

FiiO E9 Overview

  • Product Demo

The Fiio E9 Desktop Headphone Amplifier with E7 Dock is designed to work with the Fiio E7 USB DAC Headphone Amplifier and USB soundcard. It features dual-channel power outputs for both 1/4" and 1/8" headphone plugs, as well as an additional RCA L/R audio output, USB interface and line input. The amplifier features a Texas Instruments main power amp integrated circuit with a low noise level, low distortion and a high conversion rate. The E9 is cleverly designed with an E7 dock for using the line out signal from the Fiio E7 docking port. This provides better sound quality and makes the amp able to drive high impedance or low sensitivity headphones - giving you the clarity and punch to make your music sound alive and vibrant. Plus, it lets you charge and sync the E7 with your computer as well. The E9 even has a Low/High gain section switch, LED power indicator and a built-in power converter to meet the demands of high dynamic signal processing.

Dual-channel power output for two headphone plugs. It features both 1/8" (3.5 mm) and 1/4" (6.35 mm) type headphone output jacks
Device uses a Texas Instruments TPA6120 Integrated Circuit, which is their main power amplifier IC with a low noise level, low distortion and a high conversion rate
Features On/Off/Mute function for amplifier output protection with sealed, low-noise ALPS potentiometer
Internal audio buffer amplification with low 0.00008% THD and a high switching rate
Fiio E7 docking base for E7 USB DAC Headphone Amp and external USB soundcard. The dock also facilitates charging and USB synchronization data exchange with computer
The E9 features a low (10 dB) / high (18 dB) gain section switch
Dual audio outputs with an adjustable 1/8" (3.5 mm) output and a fixed, non-adjustable RCA L/R audio output
Built-in high-efficiency, high-precision and low-noise power converter meets the demands of high dynamic signal processing
E9 Amplifier has an LED power indicator light
Priority output means RCA output will not work after plugging into a headphone jack