Mackie MDB-USB Users Manual
OWNER’S MANUAL
MONO
ON/OFF
LEVEL
LEFT OUTPUT RIGHT OUTPUT
PHONES
USB INPUT
GROUND
LIFT
POWER
Important Safety Instructions
.
Read these instructions.
2.
Keep these instructions.
3.
Heed all warnings.
4.
Follow all instructions.
5.
Do not use this apparatus near water.
6.
Clean only with a dry cloth.
7.
Do not block any ventilation openings. Install in accordance
with the manufacturer’s instructions.
8.
Do not install near any heat sources such as radiators, heat
registers, stoves,
or other apparatus (including amplifiers) that produce heat.
9.
Only use attachments/accessories specified by the
manufacturer.
10.
Refer all servicing to qualified service personnel. Servicing is
MDB-USB Stereo Direct Box
required when the apparatus has been damaged in any way, such
as power-supply cord or plug is damaged, liquid has been spilled
or objects have fallen into the apparatus, the apparatus has been
exposed to rain or moisture, does not operate normally, or has
been dropped.
11.
This apparatus shall not be exposed to dripping or splashing, and
no object filled with liquids, such as vases or beer glasses, shall
be placed on the apparatus.
12.
This device complies with Part 5 of the FCC Rules. Operation is
subject to the following two conditions: () this device may not
cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause
undesired operation.
NOTE:
This equipment has been tested and found to comply
with the limits for a Class B digital device, pursuant to part
15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a
residential installation. This equipment generates, uses, and
can radiate radio frequency energy and, if not installed and
used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no
guarantee that interference will not occur in a particular
installation.
If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the
equipment o and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment
and the receiver.
• Connect the equipment into an outlet on a circuit
dierent from that to which the receiver is connected.
• Consult the dealer or an experienced radio / TV
technician for help.
CAUTION:
Changes or modifications to this device not expressly
approved by LOUD Audio LLC could void the user's authority to
operate the equipment under FCC rules.
WARNING — To reduce the risk of fire or electric shock,
do not expose this apparatus to rain or moisture.
3.
This device complies with FCC radiation exposure limits set
forth for an uncontrolled environment. This device should be
installed and operated with minimum distance 20cm between
the radiator & your body.
4.
This apparatus does not exceed the Class A/Class B
(whichever is applicable) limits for radio noise emissions
from digital apparatus as set out in the radio interference
regulations of the Canadian Department of Communications.
ATTENTION
— Le présent appareil numérique n’émet pas de bruits
radioélectriques dépassant las limites applicables aux
appareils numériques de class A/de class B (selon le cas)
prescrites dans le réglement sur le brouillage radioélectrique
édicté par les ministere des communications du Canada.
5.
This device complies with Industry Canada licence-exempt RSS
standard(s).
Operation is subject to the following two conditions:
() this device may not cause interference, and
(2) this device must accept any interference, including
interference that may cause undesired operation of the device.
Le présent appareil est conforme aux CNR d’Industrie
Canada applicables aux appareils radio exempts de licence.
L’exploitation est autorisée aux deux conditions suivantes:
() l’appareil ne doit pas produire de brouillage, et
(2) l’utilisateur de l’appareil doit accepter tout brouillage
radioélectrique subi, même si le brouillage est susceptible d’en
compromettre le fonctionnement.
6.
Exposure to extremely high noise levels may cause permanent
hearing loss. Individuals vary considerably in susceptibility to
noise-induced hearing loss, but nearly everyone will lose some
hearing if exposed to suciently intense noise for a period of
time. The U.S. Government’s Occupational Safety and Health
Administration (OSHA) has specified the permissible noise
level exposures shown in the following chart.
According to OSHA, any exposure in excess of these
permissible limits could result in some hearing loss. To
ensure against potentially dangerous exposure to high sound
pressure levels, it is recommended that all persons exposed
to equipment capable of producing high sound pressure levels
use hearing protectors while the equipment is in operation.
Ear plugs or protectors in the ear canals or over the ears must
be worn when operating the equipment in order to prevent
permanent hearing loss if exposure is in excess of the limits set
forth here:
Duration, per
day in hours
8 90 Duo in small club
6 92
4 95 Subway Train
3 97
2 100 Very loud classical music
1.5 102
1 105 Ryan screaming at Troy about deadlines
0.5 110
0.25 or less 115 Loudest parts at a rock concert
Sound Level dBA,
Slow Response
Typical Example
Correct disposal of this product: This symbol indicates that this product should not be disposed of with your household waste, according to the WEEE
directive (2012/19/EU) and your national law. This product should be handed over to an authorized collection site for recycling waste electrical and
electronic equipment (EEE). Improper handling of this type of waste could have a possible negative impact on the environment and human health due
to potentially hazardous substances that are generally associated with EEE. At the same time, your cooperation in the correct disposal of this product
will contribute to the eective usage of natural resources. For more information about where you can drop o your waste equipment for recycling, please
contact your local city oce, waste authority, or your household waste disposal service.
2
MDB-USB Stereo Direct Box
Contents
Owner’s Manual
Introduction
Important Safety Instructions ........................................ 2
Contents ........................................................................... 3
Features ............................................................................3
How To Use This Manual ................................................. 3
Introduction ..................................................................... 3
Getting Started ................................................................ 3
Things To Remember ....................................................... 3
Hookup Diagram .............................................................. 4
MDB-USB: Front Panel Features .................................... 5
1. USB Input ............................................................... 5
2. Power LED .............................................................5
3. Level Knob .............................................................5
4. Headphone Output ...............................................5
5. Mono On / O Switch ........................................... 5
6. Mono On / O LED ................................................ 5
MDB-USB: Rear Panel Features .....................................6
7. XLR Output Jacks ................................................. 6
8. Ground Lif Switch ...............................................6
Appendix A: Service Information ....................................7
Appendix B: Technical Information ................................ 8
MDB-USB Dimensions .............................................8
MDB-USB Block Diagram ........................................9
Limited Warranty ........................................................... 10
With the bus-powered MDB-USB Stereo DI, the days of
relying on your headphone jack to get audio from a computer
into analog gear are over.
Combining a high-resolution audio interface with a noise
and distortion-free stereo DI, MDB-USB converts your digital
audio into clean, balanced, stereo output.
Featuring an output level control, headphone output, and
mono sum for maximum versatility. Analog outputs are dual
XLR with ground lif.
Getting Started
The following steps will help you set up the MDB-USB Stereo
Direct Box quickly.
1. Turn down all level knobs on all connected gear.
2. Connect cords from the XLR outputs of the MDB-USB to
the inputs of a mixer, powered speakers or studio monitors.
3. Push the USB cable securely into the MDB-USB’s USB
input connector and plug the other end into any open USB
slot of the computer.
4. Turn the computer on. Make sure the MDB-USB powers
up, as well, indicated by the power LED.
5. Turn the mixer, powered speakers or studio monitors on.
Features
• Connect your computer directly via USB
• High-resolution 24-bit / 96 kHz interface
• Balanced, low-impedance XLR outputs with Ground Lif
• Output level control with Mono switch
• Headphone output for easy monitoring
• Noise-free operation
• Powered by computer
• Plug-and-play operation, no driver required
• Built-Like-A-Tank™ construction
How to Use This Manual
Afer this introduction, a getting started guide will help you
get things set up fast. The hookup diagram shows a typical
setup.
This icon marks information that is critically
important or unique to the MDB-USB.
For your own good, read and remember them.
6. Be sure that the volume of the input is the same as it
would be during normal use.
7. Slowly raise the level knob to a comfortable listening level.
Things to Remember
• Never listen to loud music for prolonged periods.
Please see the Safety Instructions on page 2 for
information on hearing protection.
• Save the shipping boxes and packing materials!
You may need them someday. Besides, your hamster
will love playing in them and jumping out at you
unexpectedly. Remember to pretend like you
are surprised!
• Save your sales receipt in a safe place.
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Part No. SW1225 Rev. B 01/19
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Owner’s Manual
3
Hookup Diagram
MDB-USB Stereo Direct Box
LEVEL
MONO
ON/OFF
PHONES
USB INPUT
STEREO DIRECT BOX
POWER
PC / MAC
LEFT OUTPUT RIGHT OUTPUT
GROUND
LIFT
As you can see in this hookup diagram, the MDB-USB is a convenient stereo direct box to add to the chain.
Let’s look at the front panel connections first. Start by simply connecting a USB cable from the computer’s
USB slot to the MDB-USB input jack. And end by simply connecting a pair of headphones to the phones
1/8" output jack. Front panel connections made!
The rear panel connections are as straighforward as the front panel connections. Here we connected
the XLR L/R line output jacks of the MDB-USB to the inputs of a Mackie 1202VLZ4 mixer. The outputs
of the mixer are then connected to the inputs of the house PA loudspeaker system.
That was our part. The next part is up to you... crank up and get the floor shakin’!
Typical MDB-USB Setup
4
MDB-USB Stereo Direct Box
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