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MDB-USB Ster

eo Dir

ect Bo

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MDB-USB Stereo Direct Box

Important Safety Instructions

1.

  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 

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 15 of the FCC Rules. Operation is 

subject to the following two conditions: (1) 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 off 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  

 

 

     different 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.

13.

  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.

14.

  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.

15.

  This device complies with Industry Canada licence-exempt RSS 

standard(s).  

Operation is subject to the following two conditions:

(1)  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:

(1)  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.

16.

  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 sufficiently 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

Sound Level dBA, 

Slow Response

Typical Example 

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

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 effective usage of natural resources. For more information about where you can drop off your waste equipment for recycling, please 

contact your local city office, waste authority, or your household waste disposal service.

Summary of Contents for MDB-USB

Page 1: ...OWNER S MANUAL POWER USB INPUT PHONES MONO ON OFF LEVEL LEFT OUTPUT RIGHT OUTPUT GROUND LIFT...

Page 2: ...dio noise emissions from digital apparatus as set out in the radio interference regulations of the Canadian Department of Communications ATTENTION Le pr sent appareil num rique n met pas de bruits rad...

Page 3: ...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 w...

Page 4: ...headphones to the phones 1 8 output jack Front panel connections made The rear panel connections are as straightforward as the front panel connections Here we connected the XLR L R line output jacks...

Page 5: ...34 29 37 10 POWER USB INPUT PHONES MONO ON OFF LEVEL STEREO DIRECT BOX 2 1 4 5 6 3 4 Headphone Output This 1 8 TRS connector supplies the output to stereo headphones It is the same signal that is rou...

Page 6: ...eld ground Pin 2 Positive or hot Pin 3 Negative or cold Fortune A feeling is an idea with roots Lucky numbers 12 46 79 40 2 34 2 1 SHIELD COLD HOT 3 SHIELD COLD HOT 3 2 1 8 Ground Lift Switch The grou...

Page 7: ...of useful information such as FAQs and other documentation You may find the answer to the problem without having to part with your MDB USB Stereo Direct Box Troubleshooting Nopower Our favorite quest...

Page 8: ...names mentioned are trademarks or registered trademarks of their respective holders and are hereby acknowledged 2018 LOUD Audio LLC All Rights Reserved AudioPerformance Frequency Response 20 Hz 20 kH...

Page 9: ...BlockDiagram USB RECEIVER FIXED RESISTANCE FIXED RESISTANCE 5 4 6 MONO OUTPUT LEVEL LA LINE AMP LA LINE AMP 2 3 1 XLR OUT L PHONE JACK HEADPHONE 2 3 1 XLR OUT R FIXED RESISTANCE FIXED RESISTANCE LA LI...

Page 10: ...otice of the noncompliance within the Warranty Period to the Company at www mackie com or by calling LOUD technical support at 1 800 898 3211 toll free in the U S and Canada during normal business hou...

Page 11: ...16220 Wood Red Road NE Woodinville WA 98072 USA Phone 425 487 4333 Toll free 800 898 3211 Fax 425 487 4337 www mackie com...

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