Monoprice 11567 User Manual

MONOPRICE
Desktop Headphone Amplifier
PID 11567

Quick Installation Guide

Brief Introduction:

This headphone amplifier uses a professional level audio IC from Texas
Instruments to achieve low noise and distortion and high output on a wide
variety of headphones. The high-current output design allows it to easily drive
headphones with a wide impedance range and the line and preamp outputs
allow you to connect to an external amplifier or a set of powered speakers.
Specifications:
USB DAC:
Output Power:
Headphone Impedance Range:
SNR:
Distortion:
Frequency Response:
Fixed Line Out:
Adjustable Pre-out:
Power Supply:

Package Contents:

Please verify that you received all the items listed below:
Headphone Amplifier: 1 PCS
Power Adaptor: 1 PCS
Audio Cable: 1 PCS

Operating Instructions:

(1) (3) (2) (4)
(1) Input Selector Switch:
USB DAC: Converts digital USB audio from your PC to analog audio for use
with headsets and consumer electronics amplifiers/receivers.
AUX IN: Selects the AUX RCA inputs on the back of the amp.
96KHZ / 24bit
≥ 900mW (32Ω Loaded)
≥ 150mW (300Ω Loaded)
16Ω ~ 600Ω
≥ 100dB (A weight) [AUX IN]
< 0.003% [AUX IN]
20Hz ~ 20KHz
< 2V rms
0 ~ 6V rms
DC15V, 2A
USB Cable: 1 PCS
Manual: 1 PCS
(5) (6) (8) (7) (9) (10)
(2) Volume Control / Power Switch:
Turn the knob clockwise to turn the amplifier on and to increase volume.
Turn the knob counterclockwise to decrease the volume and to turn the
amplifier off.
(3) Power Indicator:
When first turned on, the LED will glow red for 3-4 seconds, then will glow
blue indicating that power is on. When power is off, the LED is off.
(4) Headphone Output Jack:
1/4" (6.35mm) stereo headphone jack. See the Specifications
section for suitable headphone characteristics.
(5) DC Power Connector:
Plug the included power adapter into this jack. The input
voltage range for the power adaptor is AC100~240V, 50/60 Hz
(6) USB Connector:
Connect the amplifier to a PC using the included USB cable.
(7) PRE OUT Connectors:
Connect an external amplifier or powered speakers to these outputs. The
output level is controlled using the Volume knob and varies from 0 ~ 6V rms.
(8) Gain Switch:
High Gain (up): This setting is suitable for headphones with high impedance or
low sensitivity.
Low Gain (down): This setting is suitable for low impedance or high sensitivity
headphones.
(9) LINE OUT Connectors:
Outputs a line level signal, suitable for use as an input to a CD recorder or
tape deck. The volume control does not affect the level of this signal.
(10) AUX IN Connectors:
Connect a line level audio source, such as a CD player, to these inputs.

Safety Warnings:

● To prevent damage to your hearing, do not listen to music at excessive
volume levels. Turn down the volume before connecting headphones.
Avoid prolonged use of headphones.
● Keep away from water or moisture of any kind. Do not use in dusty
environments.
● Do not open or attempt to repair this amplifier. Always use the included AC
power adapter or an exact replacement.

Troubleshooting:

If you cannot hear sound, check the following:
●
Double check all connections to ensure that they secure.
●
Double check the source and destination routing.
●
Try switching the audio source.
Try a different set of headphones or speakers.
Check the power source to ensure it is active.
15 V/DC, 2 A
April 2014