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MP-2 Microphone Preamplifier

 

User Guide and Technical Information

 

 

Page 4

 

 

©1999-2000 Sound Devices, LLC  

Input Panel Connectors and Controls 

 
 

 
 

12. 

MIC INPUTS 

Transformer-balanced XLR inputs accepts 

microphone level signals.  Pin 2 = hot, pin 3 = 

cold, pin 1 = ground. 

13. 

PHANTOM Power  

Three-position switch selects either 48-volt or 
15-volt phantom power for both inputs. Center 

position turns phantom power off.  

14. 

High Pass Filter Switch 

Three-position switch selects 80 Hz or 160 Hz 

corner frequency filters, 6 dB per octave. 
Filters affect both inputs. Center position of 

switch removes filters from the signal path. 

15. 

Tape Output 

3.5 mm TRS stereo output (unbalanced) can 

be used to feed consumer level DAT, MiniDisc, 

and CD recorders.  Tip = left, ring = right, 
sleeve = ground. 

16. 

Tape Return Level Control 

Recessed potentiometers adjust Tape Return 

level feeding the Headphone Monitor. 

17. 

Limiter Switch 

Activates input peak limiter. ON position 

functions as a dual mono limiter, with each 
input signal controlling its own limiter. LINK 

functions as a stereo limiter, with both left and 

right inputs controlled simultaneously. Center 

position of switch turns limiter off. 

18. 

Limiter Threshold Level Control 

Recessed potentiometers adjust peak level of 

limiter activation. Can be independently 

controlled for each input.

 

 

Output Panel Connectors 

 

19. 

Strap Slot 

Attachment point for camera straps. 

20. 

Tape Return Input Connector 

3.5 mm TRS stereo (unbalanced) connector 

allows external audio sources to be monitored 

in the MP-2 Headphone circuit. Tip = left, ring 

= right, sleeve = ground. 

21. 

Left and Right Line Level Outputs 

Active-balanced XLR line-level outputs. +22 

dBu peak output level. Pin 2 = hot, pin 3 = 

cold, pin 1 = ground. Pin 3 can be grounded or 

ungrounded to drive unbalanced inputs. 

22. 

BATTERY Compartment 

MP-2 operates on two AA batteries. Insert 

positive (+) end of batteries first. 

23. 

External DC Power Input

 

Accepts external DC power source (battery 

supply or AC to DC transformer) from 5 - 18 
VDC. Locking, threaded coaxial connector. 

Center pin = positive, sleeve = negative.

MIC INPUTS

1

2

12V

48V

80

160

LIMITER

L

R

L

R

TAPE OUT

PHANTOM

LINK

ON

THRESHOLD

TAPE RTN

LEVEL

1(L)

2(R)

LINE OUTPUTS

5-14 VDC

+

-

TAPE RTN

12 

15

13

14

17

16 

18

22 

23 

20

21

19 

Summary of Contents for MP-2

Page 1: ...extra high headroom Audio Performance Dynamic range exceeding 110 dB 10 Hz to 50 kHz audio bandwidth Exceptionally low distortion characteristics Discrete 6 transistor balanced output drivers provide robust drive for long cable runs Headphone Monitoring High current headphone monitor circuit enables monitoring of program audio or external stereo tape return audio Headphone level control and peak i...

Page 2: ... Pass Filters 80 Hz or 160 Hz switch selectable 6 dB per octave Phantom Power 15 V through 680 ohm resistors or 48 V through 6 8k resistors switch selectable Limiter Thresholds independently adjustable from 10 dBu to 18 dBu 10 1 limiting ratio 5 mS attack time 100 mS release time Amber Red LED indicates limiting clipping Dual mono or stereo linked Internal Voltage Rails 15 V and 15 V regulated Met...

Page 3: ...ination or super bright illumination 6 Tape Return Switch Toggle switch allows external audio to be monitored in the headphones The center position is MP 2 program audio The left and right positions monitor tape return audio the left position is locking and the right position is momentary 7 Headphone Connector Accepts stereo and mono headphones with connectors 8 Headphone Volume Control Adjusts th...

Page 4: ...limiter LINK functions as a stereo limiter with both left and right inputs controlled simultaneously Center position of switch turns limiter off 18 Limiter Threshold Level Control Recessed potentiometers adjust peak level of limiter activation Can be independently controlled for each input Output Panel Connectors 19 Strap Slot Attachment point for camera straps 20 Tape Return Input Connector 3 5 m...

Page 5: ...48 volt phantom therefore 15 volt phantom is appropriate The 15 volt setting will increase battery life versus the 48 volt setting Microphones requiring 48 volt phantom will not operate or may operate with lower headroom and increased distortion at the 15 volt setting therefore use 48 volt phantom for these mics Consult your microphone documentation Dynamic microphones do not require phantom power...

Page 6: ...n excess of 50 dB making it very difficult to clip the unit no matter the gain setting The three position Limiter switch can be set to operate in either dual mono or stereo linked operation Dual mono operation ON switch position allows each input to limit independently responding only to its input signal Stereo linked operation LINK switch position connects both limiters ensuring that the limiters...

Page 7: ...s Current Draw The MP 2 can vary significantly in the amount of current it draws Several functions of the MP 2 directly affect current draw in different ways The following list highlights the larger current drawing functions listed from highest to lowest current draw 1 Phantom power the main source of extra MP 2 current draw See Phantom Power 48V Phantom can draw copious amounts of current out of ...

Page 8: ... IEC1000 4 2 1995 EN61000 4 3 1995 Radiated RF Immunity 10 V m 80 1 kHz amplitude IEC1000 4 3 1995 modulation EN61000 4 4 1995 EFT Burst I O lines 25 kV to 1 0 kV IEC1000 4 4 1995 EN61000 4 6 1996 Conducted RF Immunity 10 V 80 1 kHz amplitude modulation IEC1000 4 6 1996 Tested by L S Compliance Inc Cedarburg Wisconsin December 16 1999 Matthew Anderson Director of Engineering Warranty Sound Devices...

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