©2001-2004 Sound Devices, LLC
Sound Devices, LLC
300 Wengel Drive
Reedsburg, WI 53959 USA
Ph: +1 (608) 524-0625
Fax: +1 (608) 524-0655
www.sounddevices.com
MixPre
Microphone Preamplifier
User Guide and Technical Information
Страница 1: ... 2004 Sound Devices LLC Sound Devices LLC 300 Wengel Drive Reedsburg WI 53959 USA Ph 1 608 524 0625 Fax 1 608 524 0655 www sounddevices com MixPre Microphone Preamplifier User Guide and Technical Information ...
Страница 2: ...le portable mixer The MixPre has impressive audio performance and com prehensive features making it ideal for the front end of any studio or field production system Radio television and film production engineers value its compact size and ability to withstand environmental extremes The MixPre combines rugged mechanical and electrical construction compact size and high quality components for no compr...
Страница 3: ...w distortion characteristics Discrete 6 transistor balanced output drivers Headphone Monitoring High current headphone monitor circuit Headphone level control and peak indicator Level Metering Sunlight readable seven segment GaN LED output meters 3 position LED brightness switch Two color clip limiter activity LEDs per input channel Audio Limiters Unclippable input peak limiters via two stage opto...
Страница 4: ...ontrolled by momentary Slate Micro phone Switch Slate Microphone output appears at all outputs 5 Tone Oscillator Slate Microphone Switch Toggle switch activates a 1 kHz tone oscillator when switched to the left position and activates the slate microphone when in the right mo mentary position Microphone inputs are muted when tone or slate are activated 6 Output Level Meter Indicates peak output lev...
Страница 5: ...phone circuit Also illuminates 3 dB before clipping of either channel of Tape Return audio 12 POWER Switch Three position switch selects the power source The unit is powered from internal batteries when in the left position powered from external DC source when in the right position Center position is off 13 POWER LED Two color LED illuminates green when the unit is powered and changes to red when ...
Страница 6: ...ts 80 Hz or 160 Hz corner frequency filters 6 dB per octave Filters affect both inputs Center position of switch re moves filters from the signal path 17 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 18 Tape Return Level Control Recessed potentiometers adjust Tape Return level feeding the Head phone ...
Страница 7: ... be monitored in the MixPre Headphone circuit Tip left ring right sleeve ground 23 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 To unbalance use pin 2 as signal and pin 1 as ground pin 3 should not be grounded 24 BATTERY Compartment MixPre operates on two AA batteries Insert positive end of batteries first 25 Ext...
Страница 8: ...robust line driving capability To drive unbal anced inputs pin 3 should not be connected When unbalancing the con nection the output level will be reduced by 6 dB The Tape Output is designed to feed consumer level devices such as com puter sound cards DAT or MiniDisc recorders and cassette recorders A cable wired with 3 5 mm TRS to 3 5 mm TRS or 3 5 mm TRS to Left Right phono RCA connectors is use...
Страница 9: ...requency energy in audio signals This excess energy can be caused by multiple sources including wind noise vibration unidi rectional proximity effect or high ambient noise levels The 80 Hz position is appropriate when recording general speech music and ambient sound The 160 Hz position is useful to enhance speech clarity The MixPre high pass circuit topology is unique in that the filters are placed...
Страница 10: ...etting The three position Limiter switch can be set to operate in either dual mono or stereo linked operation Dual mono operation ON switch position al lows each input to limit independently responding only to its input signal Stereo linked operation LINK switch position connects both limiters ensuring that the limiters control both channels identically This linking is important for stereo operati...
Страница 11: ...imal current draw under all lighting conditions including direct sunlight The front panel Meter Bright ness switch controls the meter brightness low normal or super bright The meter indicates a signal range of 46 dB From left to right the first three LED s are separated by 15 dB and the next four LED s are separated by 4 dB This calibration provides a large dynamic range with good resolution in the...
Страница 12: ...m Power 48V Phantom can draw copious amounts of current out of the batteries depending on what model microphone is used Two phantom powered microphones draw twice as much current as one Microphones vary widely in their current draw depending on type and phantom voltage applied 2 Headphone output circuit high headphone output levels increase cur rent draw 3 Meter illumination intensity higher meter...
Страница 13: ...50 Input XLR Transformer balanced 2k ohm input imped ance Input Tape In to Headphone Output Unbalanced 1 meg ohm input impedance Outputs XLR Active balanced 120 ohm output imped ance Tape 3 5 mm Unbalanced tip left ring right sleeve ground 2 1k ohm output impedance High 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 ...
Страница 14: ... 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 Power LED Green indicates power and good battery Red indicates power and low battery LED ...
Страница 15: ...ransferable warranty that extends only to the original purchaser Sound Devices LLC will repair or replace the product at its discretion at no charge Warranty claims due to severe service conditions will be addressed on an individual basis THE WAR RANTY AND REMEDIES SET FORTH ABOVE ARE EXCLUSIVE SOUND DEVICES LLC DISCLAIMS ALL OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING WARRANTIES OF MERCHANTABIL...
Страница 16: ...MixPre User Guide ...
