Input:
3.5mm Line-In 1 - To stereo audio source
3.5mm Line-In 2 - To stereo audio source
USB Power (Micro USB 5V input)

Output:
3.5mm Headphone Jack
3.5mm Line-Out - To Active speaker

Control Knobs:
Treble
Middle
Bass
Balance
Volume

Switches:
Defeat: Bypass the tone control
Loudness: Flat or Loudness

Quad Op-Amp design

3 way equalizing: Treble, Middle, and Bass

Treble:
Control Range: 3KHz-20KHz
Trim Range: -12dB to +12dB
Center Freq: 18KHz

Middle:
Control Range: 200Hz-4KHz
Trim Range: -10dB to +10dB
Center Freq: 1KHz

Bass:
Control Range: 20-250Hz
Trim Range: -14dB to +14dB
Center Freq: 0Hz

Audio channel balance control trim range 10dB+

Independent Op-Amp for each channel to minimize the crosstalk

Stereo Crosstalk: 90dB

SNR: around 112dB (A-weighting)

THD: 0.003% (A-weighting)

Max. Headphone Output power: around 200mW/16ohm, 120mW/32ohm at 1KHz

Direct switch for by-pass hardware tone control

Hardware loudness EQ

USB Powered

Power On LED

Package Includes
Tone control headphone amp and pre-amp
USB 2.0 Type A to Micro USB Power Cable (3ft)
RCA to 3.5mm Cable (5ft)
Utility CD