Monoprice 615808 User manual

8-Channel Audio Mixer with USB I/O
User Guide
®

615808 User Guide
i
Table of Contents
®
Table of Contents
Product Overview............................................1
Box Contents ............................................................1
Installation Requirements...................................................1
System Requirements......................................................1
Hardware Overview & Installation ...........................................1
Plug and Play Installation .....................................6
Windows ...............................................................6
Mac ....................................................................6
Specifications ...............................................7
Regulatory Information.......................................8
Warranty Information ........................................9
Warranty Period..........................................................9
Returns .................................................................9
Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Contact Information ........................................11

1
Product Overview615808 User Guide
®
Product Overview
Thank you for purchasing the Model 615808 8-Channel
Audio Mixer with USB I/O by Monoprice®. The 615808 is a
14-input, 8-channel mixer that features a full suite of input
options, including four balanced XLR microphone inputs, four
unbalanced mono 1/4” TS line inputs, two pairs of unbalanced
mono 1/4” TS inputs grouped together for stereo control,
a single USB input/output for connection to a computer, a
3.5mm stereo TRS input, and a pair of RCA inputs.The mixer
can provide +48V Phantom Power to all four XLR mic inputs.
In addition to the USB input/output, this mixer has five
additional outputs.The Phones output is an unbalanced
stereo 1/4” TRS connection, while the Aux Send and the R
and L outputs are all unbalanced mono 1/4” TS connections.
Additionally, there is a pair of RCA outputs.The R and L
outputs are grouped together for stereo control on the mixer.
The 615808 includes the necessary mounting bracket for
properly attaching the mixer to a stand mount.
This User Guide is designed to provide details about how to
set up and use the 615808 using a PC or Mac (see System
Requirements for compatibility).
Box Contents
L R
-∞+10
-∞+10
AUX
PRE
1 2 3 4 5/6 7/8
PAN
LEVEL
-∞+10
LEVEL
MAIN
-∞+10
LEVEL
2TK
-∞+10
LEVEL
PHONES
-∞+10
LEVEL
AUX
L R
-∞+10
-∞+10
AUX
PRE
PAN
LEVEL
L R
-∞+10
-∞+10
AUX
PRE
PAN
LEVEL
L R
-∞+10
-∞+10
AUX
PRE
PAN
LEVEL
L R
-∞+10
-∞+10
AUX
PRE
BAL
LEVEL
L R
-∞+10
-∞+10
0
-15 +15
LOW
80Hz
0
-15 +15
LOW
80Hz
0
-15 +15
LOW
80Hz
0
-15 +15
LOW
80Hz
0
-15 +15
LOW
80Hz
0
-15 +15
LOW
80Hz
AUX
PRE
BAL
LEVEL
0
-15 +15
-20dB
0 dB +25 dB +45dB LINE MIC
HI
12kHz
GAIN
HI
12kHz HI 12kHz HI 12kHz HI 12kHz HI 12kHz
0
-15 +15
0
-15 +15
0
-15 +15
0
-15 +15
0
-15 +15
-20dB
0 dB +25 dB +45dB LINE MIC
GAIN
-20dB
0 dB +25 dB +45dB LINE MIC
GAIN
-20dB
0 dB +25 dB +45dB LINE MIC
GAIN
L R
2TK/IN
2TK/OUT
2TK
MAIN
2TKTO
MAIN
CD/IN POWER
CLIP
L
-10
-20
0
CLIP
R
-10
-20
0
+48V
615808 Audio Mixer Power Supply
8-Channel Audio Mixer with USB I/O
User Guide
®
Mounting Bracket User Guide
Installation Requirements
• USB A-Male to B-Male Cable
• Flat head screwdriver (for attaching mounting bracket)
System Requirements
• Microsoft Windows XP, WindowsVista,Windows 7,
Windows 8
• Mac OS X
Hardware Overview &
Installation
• Stereo USB Audio Interface (Audio Resolution: 16-bit; up to
48kHz sample rate)
• 8 audio channels
• 14 Inputs/Stereo Output
• 4 XLR/¼” TS microphone/line input
• 4 additional ¼” TS line inputs
• USB 2-in/2-out to computer
• RCA 2-in/2-out
• 2-in CD input (stereo 3.5mm)
• ¼” Headphones Output
• +48V phantom power for condensor mics on all mic inputs
• 2 band EQ ±15dB EQ at 80Hz &12KHz
• Variable Gain
• Mic Inputs -20dB to +45dB
• Line Inputs -20dB to +25dB
• Aux Send on each channel
• 4-LED Level Indicator
• Stand mountable (stand mount included)
• USB Plug-N-Play for PC & Mac (no driver needed)
• Power Supply: DC 12V +
• Power Consumption: 11W

2
Product Overview615808 User Guide
®
L R
-∞+10
-∞+10
AUX
PRE
1 2 3 4 5/6 7/8
PAN
LEVEL
-∞+10
LEVEL
MAIN
-∞+10
LEVEL
2TK
-∞+10
LEVEL
PHONES
-∞+10
LEVEL
AUX
L R
-∞+10
-∞+10
AUX
PRE
PAN
LEVEL
L R
-∞+10
-∞+10
AUX
PRE
PAN
LEVEL
L R
-∞+10
-∞+10
AUX
PRE
PAN
LEVEL
L R
-∞+10
-∞+10
AUX
PRE
BAL
LEVEL
L R
-∞+10
-∞+10
0
-15 +15
LOW
80Hz
0
-15 +15
LOW
80Hz
0
-15 +15
LOW
80Hz
0
-15 +15
LOW
80Hz
0
-15 +15
LOW
80Hz
0
-15 +15
LOW
80Hz
AUX
PRE
BAL
LEVEL
0
-15 +15
-20 dB
0 dB +25 dB +45 dB LINE MIC
HI
12kHz
GAIN
HI
12kHz HI 12kHz HI 12kHz HI 12kHz HI 12kHz
0
-15 +15
0
-15 +15
0
-15 +15
0
-15 +15
0
-15 +15
-20 dB
0 dB +25 dB +45 dB LINE MIC
GAIN
-20 dB
0 dB +25 dB +45 dB LINE MIC
GAIN
-20 dB
0 dB +25 dB +45 dB LINE MIC
GAIN
L R
2TK/IN
2TK/OUT
2TK
MAIN
2TK TO
MAIN
CD/IN POWER
CLIP
L
-10
-20
0
CLIP
R
-10
-20
0
+48V
GAIN
GAIN The GAIN analog level control
knobs adjust the input level of the
corresponding channel’s microphone (0dB
to +45dB ) or line (-20dB to +25dB) input.
0
-15 +15
HI The HI frequency equalizer control
knobs adjust the level of the corresponding
channel +/- 15dB at the 12KHz frequency.
L R
2TK/IN
2TK/OUT
2TK/IN - 2TK/OUT Plugs Left/Right
RCA jacks for 2TK (2-track, 2-channel)
input and output.
CD/IN
CD/IN 3.5mm stereo TRS jack accepts
input from a CD player, MP3 player, or other
audio source.
+48V +48V
+48V Press the button (red) to apply
+48V phantom power. Release the button
for non-condensor mics or line-level inputs.
2TK
MAIN
2TK
MAIN
2TK MAIN Press the button (blue) to
activate the Main input. Release the button
when using the 2TK (2-track/2-channel
RCA) inputs. To hear USB audio input,
press both the “2TK/Main” and the “2TK to
Main” buttons.
2TK TO
MAIN
2TK TO
MAIN
2TK TO MAIN Press the button (blue)
to send the 2TK (2-track, 2-channel RCA)
input signal to the Main output.To hear USB
audio input, press both the “2TK/Main” and
the “2TK to Main” buttons.
POWER POWER
POWER The POWER LED will light solid
blue when connected to a power source
and the main power switch is ON.
CLIP
L
-10
-20
0
CLIP
R
-10
-20
0
LED LEVEL INDICATORS The LEDs
will light steady green to indicate the level
of the main mix. If the red CLIP indicators
are lit, reduce the output using the LEVEL
MAIN control knob.
Top View

3
Product Overview615808 User Guide
®
0
-15 +15
LOW
80Hz
LOW The LOW frequency equalizer
knobs adjust the level of the corresponding
channel +/- 15dB at the 80Hz frequency.
-∞+10
AUX
PRE
AUX PRE The AUX PRE analog level
control knobs adjust the corresponding
channel’s volume level on the AUX SEND
output.
L R
PAN
PAN/BAL The PAN/BAL analog level
control knobs adjust the corresponding
channel’s Left/Right signal balance.
-∞+10
LEVEL
LEVEL The LEVEL analog level control
knobs adjust the corresponding channel’s
output volume level, from -8dB to +10dB.
L R
-∞+10
-∞+10
AUX
PRE
1 2 3 4 5/6 7/8
PAN
LEVEL
-∞+10
LEVEL
MAIN
-∞+10
LEVEL
2TK
-∞+10
LEVEL
PHONES
-∞+10
LEVEL
AUX
L R
-∞+10
-∞+10
AUX
PRE
PAN
LEVEL
L R
-∞+10
-∞+10
AUX
PRE
PAN
LEVEL
L R
-∞+10
-∞+10
AUX
PRE
PAN
LEVEL
L R
-∞+10
-∞+10
AUX
PRE
BAL
LEVEL
L R
-∞+10
-∞+10
0
-15 +15
LOW
80Hz
0
-15 +15
LOW
80Hz
0
-15 +15
LOW
80Hz
0
-15 +15
LOW
80Hz
0
-15 +15
LOW
80Hz
0
-15 +15
LOW
80Hz
AUX
PRE
BAL
LEVEL
0
-15 +15
-20 dB
0 dB +25 dB +45 dB LINE MIC
HI
12kHz
GAIN
HI
12kHz HI 12kHz HI 12kHz HI 12kHz HI 12kHz
0
-15 +15
0
-15 +15
0
-15 +15
0
-15 +15
0
-15 +15
-20 dB
0 dB +25 dB +45 dB LINE MIC
GAIN
-20 dB
0 dB +25 dB +45 dB LINE MIC
GAIN
-20 dB
0 dB +25 dB +45 dB LINE MIC
GAIN
L R
2TK/IN
2TK/OUT
2TK
MAIN
2TK TO
MAIN
CD/IN POWER
CLIP
L
-10
-20
0
CLIP
R
-10
-20
0
+48V
Top View (continued)
-∞+10
LEVEL
AUX
LEVEL AUX The LEVEL AUX analog
level control knob adjusts the volume level
on the AUX SEND output.There is no
dedicated ‘Return’ input - use any of the 8
standard channels for return. Assure AUX
PRE for return channels is off (counter-
clockwise) to avoid feedback loops that
could damage your equipment.
-∞+10
LEVEL
PHONES
LEVEL PHONES The LEVEL PHONES
analog level control knob adjusts the volume
level for the ¼” headphones output.
-∞+10
LEVEL
2TK
LEVEL 2TK The LEVEL 2TK analog level
control knob adjusts the level of the RCA
stereo (2TK, 2-track, 2-channel) inputs.
-∞+10
LEVEL
MAIN
LEVEL MAIN The LEVEL MAIN analog
level control knob adjusts master volume
control.

4
Product Overview615808 User Guide
®
ON/OFF Main power switch.
POWER
DC 12V
+
-
POWER DC 12V Power input for use
with the included power supply.
AUX SEND
AUX SEND 1/4” TS unbalanced mono
auxiliary output.
PHONES
PHONES 1/4” TRS unbalanced stereo
audio output for headphones.
R/OUTPUT
R/OUTPUT 1/4” TS unbalanced mono
outputs for the Main audio signal.
L/OUTPUT
L/OUTPUT 1/4” TS unbalanced mono
outputs for the Main audio signal.
R/IN
R/IN 1/4” TS unbalanced mono audio
input.
L/IN
(MONO)
L/IN 1/4” TS unbalanced mono audio
input.
LINE/IN
L/IN
MIC/IN
4
5
L/IN
(MONO) (MONO)
7
R/IN
6
R/IN
ON
OFF
POWER
DC 12V
AUX SEND R/OUTPUT
PHONES L/OUTPUT
8
LINE/IN
MIC/IN
3
LINE/IN
MIC/IN
2
LINE/IN
MIC/IN
1
+
-
Back View
LINE/IN
LINE/IN 1/4” TS unbalanced mono audio
input.
MIC/IN
MIC/IN XLR inputs for either condensor
microphones requiring +48V phantom
power or ordinary microphones. Condenser
microphones require +48V phantom power.
When connecting/disconnecting XLR
microphones, be sure the +48V phantom
power is disabled to prevent microphone
damage.

5
Product Overview615808 User Guide
®
Side View
USB Port Stereo USB Audio Interface
(Audio Resolution: 16-bit; up to 48kHz
sample rate). Attach a USB A-Male to
B-Male Cable (not included) to the USB
port on the 615808 and to your PC or Mac.
Bottom View
Bracket Mount Allows attachment of
the included mounting bracket.
Mounting Bracket Attach to the
bracket mount using a flathead screwdriver.
Turn clockwise until tight. Attach to a 3/8”
mount/stand (not included).

6
PlugandPlayInstallation615808 User Guide
®
Plug and Play Installation
The 615808 is a Class Compliant USB device, which means
that it can communicate with your PC or Mac using device
drivers that are built into the operating system.These drivers
are written by Microsoft®and Apple®respectively and come
pre-installed on all computers. See System Requirements
for supported operating system versions.To begin the plug
and play installation with your computer, attach a USB A-Male
to B-Male Cable (not included) to the USB port on the left
side of the 615808 and to a USB port on your PC or Mac.
See Side View > USB Port.
Windows
After attaching a USB A-Male to B-Male Cable to the USB
port on the left side of the 615808 and to a USB port on
your PC, the device drivers will automatically install.When
complete, a notification will appear (Windows 7 featured,
other Windows version will vary.)
To view the details of the installed driver:
1. Click Start > Control Panel.
2. Click Hardware and Sound.
3. Click Device Manager.
4. Click Sound, video and game controllers.
5. Double-click USB Audio Codec for driver details.
Mac
After attaching a USB A-Male to B-Male Cable to the USB
port on the left side of the 615808 and to a USB port on
your Mac:
1. Click System Preferences.
2. Click Sound.
3. Click Output.
4. Click Input.

7
Specifications615808 User Guide
®
Specifications
Dimensions
8.7” x 8.3” x 2.7 ”
(220x210x68mm)
Weight 2.2 lbs (0.98kg)
Stereo USB Audio Interface
Audio Resolution: 16-bit;
up to 48kHz sample rate)
Audio Channels (8)
Inputs/Stereo Output (14)
4 XLR/¼” TS mic/line
inputs
4 additional ¼” TS line
inputs
USB 2-in/2-out to
computer
RCA 2-in/2-out
2-in CD input (stereo
3.5mm)
¼” Headphones Output
+48V Phantom Power All mic inputs
2 Band EQ
±15dB EQ at 80Hz
&12KHz
Variable Gain
Mic Inputs -20dB to
+45dB
Line Inputs -20dB to
+25dB
Aux Send on each channel
Level Indicator 4 LED
Stand Mountable Stand mount included
USB Plug-N-Play PC & Mac (no driver
needed)
Power Supply DC 12V +
Power Consumption 11W
Audio Specifications
Frequency Response 20Hz – 20KHz @ +/-1dB
THD+N (0 dBu) <0.008%
Signal-To-Noise Ratio
-103dB: Main Outputs
-90dB: USB, RCA &
Phones Outputs
-85dB:Aux Send
Input Impedance:
Mic: 2.3kΩ
Line: 20kΩ
CD/RCA: 24kΩ

8
Regulatory Information615808 User Guide
®
Regulatory Information
CE Marking
CE marking on this product represents the product is in compliance with all directives that are applicable to it.

9
Warranty Information615808 User Guide
®
Warranty Information
You are entitled to the manufacturer’s limited expressed
warranty, if any, that accompanies the product. Monoprice.
com makes no additional or independent warranty.All other
warranties, expressed or implied, including the warranties
of merchantability and fitness for a particular purpose are
disclaimed.
Monoprice.com shall under no circumstances be liable for
special, incidental, or consequential damages including loss
of profit, even if it has been advised of the possibility of such
damages; the maximum liability for all direct damages, if any,
arising out of any action shall be limited to an amount not to
exceed the purchase price of the product.
Warranty Period
Limited 1 Year Warranty (Parts and Labor). Monoprice
guarantees this product to be free from defects in material
and workmanship. Please visit www.monoprice.com for full
warranty support and details.
Limited Manufacturer’s Warranty
(a) Monoprice.com warrants that it has good title to
the hardware Products it sells, and that it has proper
authority to license the software products it distributes.
(b) Monoprice.com does not warrant the performance
or integrity of any Product, but merely passes through
to the Customer whatever end-user warranty the
manufacturers or software publishers provide with their
respective Products.
(c) YEAR 2001 DISCLAIMER. MONOPRICE.COM
ENCOURAGES ITS SUPPLIERS TO MAKE THEIR
PRODUCTS AND SERVICESYEAR 2001 COMPLIANT.
HOWEVER, MONOPRICE.COM CANNOT AND
DOES NOT REPRESENT OR WARRANT THAT ANY
PRODUCT IT ADVERTISES OR SELLS IS FREE FROM
DATE RELATED ERRORS RESULTING FROM THE
TURN OF THE CENTURY (THE YEAR 2001).ANY
INFORMATION PROVIDED ON PRODUCTS HAS
BEEN FURNISHED BY THE MANUFACTURER AND
IS PROVIDED TO END USERS “AS IS.” STATEMENTS
MADE TOYOU IN THE COURSE OF ANY PRIOR,
CURRENT, OR FUTURE SALE ARE SUBJECT TO
THE YEAR 2001 INFORMATION AND READINESS
DISCLOSURE ACT. IN THE CASE OF A DISPUTE,
THIS ACT MAY REDUCE YOUR LEGAL RIGHTS
REGARDING THE USE OF ANY SUCH STATEMENTS,
UNLESS OTHERWISE SPECIFIED BY YOUR
CONTRACT OR TARIFF.
(d) (d) MONOPRICE.COM DISCLAIMS ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED BY LAW,
INCLUDING MERCHANTABILITY AND USE FOR A
PARTICULAR PURPOSE.
If a product proves to be defective during the covered period,
please contact our technicians via live chat on our website
at www.monoprice.com during the hours of 6:00AM
to 7:00PM PST Monday – Friday and 9:00AM – 6:00PM PST
Saturday and Sunday.
Returns
Returns of Products are subject to Monoprice.com’s current
return policies which are set forth here on our website and
on the invoice.These policies may be subject to additional or
lesser return rights adopted by the manufacturer or publisher.
The Terms of Sale represent the complete and final agreement
between the customer and Monoprice.com for the matters
set forth herein and shall be supplemented only by the prices,
quantity, and descriptions set forth in Monoprice.com’s
invoice for the relevant sale.Terms contained in customers’
purchase orders, offers to buy, terms and conditions, and the
like shall have no effect.
For Refunds:All returns for refund must be authorized by
Monoprice.com within 30 days of the delivery date.There
is NO RESTOCKING FEE applied to any returned item(s).
However, S&H cost is not refundable.
For Replacements: Replacements will be provided for any
defective product within the specified warranty period for
that product. Replacements will be the only recourse for
returns after 30 days from the delivery date have passed.
Monoprice.com will only replace item(s) for the exact same
item(s) during its warranty period. Sorry, we cannot exchange
one item with a different item.The Product ID (PID) must be
the same.
Out of Stock or Discontinued Items: If you return a product
for replacement and it is Out of Stock or Discontinued when
the item is received, you may be contacted by the Monoprice.
com Returns team and offered a suitable replacement or
option for a store credit.
All returns, whether for refund or replacement, require a
Return Merchandise Authorization (RMA). Products that are
returned without prior RMA and the RMA# clearly printed
on the address label will be refused and sent back to the
sender. Please use the label provided when your RMA is
issued. If you did not receive a copy of the label in your e-mail
confirmation, you can print a copy from the RMA Status
page in the My Account section of the website after you have
logged in.
Monoprice.com is not liable for packages that are lost in
transit. It is highly recommended that you use a trackable
shipping service when you send back your merchandise.

10
Block Diagram615808 User Guide
®
Block Diagram

11
Contact Information
20130308 MEA/JWF
615808 User Guide
®
Contact Information
®
11701 6th Street
Rancho Cucamonga, CA 91730
Telephone : [phone]
Fax : [phone]
www.monoprice.com
© 2013 Monoprice, Inc.All rights reserved.
Customer Service
Toll Free at 1-877-271-2592
Availability
Monday ~ Friday: 6:00AM ~ 7:00PM PT
Saturday & Sunday: 9:00AM ~ 6:00PM PT
[e-mail]
Technical Support*Live Chat
www.monoprice.com
Availability
Monday ~ Friday: 6:00AM ~ 7:00PM PT
Saturday & Sunday: 9:00AM ~ 6:00PM PT
[e-mail]
*Technical Support is not available by telephone. Please use Live Chat if you have any questions regarding technical support.
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