background image

MDB-USB Ster

eo Dir

ect Bo

x

6

MDB-USB Stereo Direct Box

7. XLR Output Jacks

These XLR connectors provide a balanced line-level 

signal that is designed to connect to the inputs of a 

mixer, powered speakers or studio monitors.

They are wired as follows, according to standards 

specified by the AES (Audio Engineering Society): 

Balanced XLR Output Connector
 

Pin 1 – Shield (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 ground lift separates the chassis ground from  

the signal ground at the balanced output jacks. The 

default position is ground. You may attempt to remedy 

system ground loop hum by moving the switch to lift.
Fortune: Spring has sprung. Life is blooming. 

Lucky numbers: 6–11–19–23–26–28

LEFT OUTPUT

RIGHT OUTPUT

GROUND

LIFT

8

7

7

MDB-USB Stereo DIrect Box: Rear Panel Features

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...

Reviews: