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MICROPHONE PRE-AMPLIFIER

MPA RS 01

USER´s MANUAL

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Содержание MPA RS 01

Страница 1: ...1 MICROPHONE PRE AMPLIFIER MPA RS 01 USER s MANUAL ...

Страница 2: ... 3 Safety Instructions 5 The Earth Grounding Concept 7 Connection Connectors 9 General 9 Operation 10 Theory and practice the gain stage 13 Operation 13 Dismantling 16 Jumper Setting 17 Technical Data 18 Conformity Statement 19 Warranty 20 ...

Страница 3: ... of experience and countless products for the pro audio domain Among others the first German made 20 bit A D and D A converters were developed by Lake People in the early nineties of the past century Who manufactures Lake People equipment The devices are exclusively manufactured in Germany by Lake People electronic GmbH or contractors in the company s vicinity Lake People puts high emphasis on dom...

Страница 4: ...turer directly Of course the client will benefit from Lake People s full technical support even when warranty has expired Any technical questions or need for advice is welcome LAKE PEOPLE electronic GmbH Turmstrasse 7a D 78467 Konstanz Fon 49 0 7531 73678 Fax 49 0 7531 74998 Mail info lake people de www violectric de www violectric com www lake people de www lake people com ...

Страница 5: ...e fuse of this appliance is soldered in place and accessible from the inside only A blown fuse may indicate an internal problem and should be replaced during qualified servicing or repair works Power Supply The unit should be operated with the provided wall plug adaptor but also standard USB cell phone supplies are suitable However because of the sometimes relatively thin cables of these devices t...

Страница 6: ...it conforms to the Product Specifications noted as Declaration of Conformity at the end of this manual Operation is subject to the following conditions this device may not cause harmful interferences this device must accept any interference received including interference that may cause undesired operation this device must not be operated within significant electromagnetic field VOR DEM ÖFFNEN NET...

Страница 7: ...e point Ground is connected to the case XLR GROUD LIFT Jumper accessible from the inside see also page 17 To minimize or avoid ground buzz and hum the earth ground relationship may be altered as follows G ROUND Ex works all jumpers are set to G ROUND position Pin 1 is connected to the internal ground reference High frequency interferences are deflected to the case via a 100 nF capacitor ...

Страница 8: ...ia a 100 nF capacitor This jumper position is useful when the unit is equipped with transformers C ASE Pin 1 is connected to the case the 100 nF capacitor is bridged Please note that with jumpers in LIFT or CASE position EMC problems might occur These are in the field of the user s responsibility Connection Connectors ...

Страница 9: ...play sensitivity can be adjusted internally to the user s requirements The inputs and outputs are situated on the back panel they are equipped with gold plated XLR connectors for balanced output signals and RCA connectors for unbalanced output signals FEATURES 2 balanced inputs via XLR Gain switchable from 0 66 dB in 12 steps of 6 dB Switchable Lo Cut 12 dB Oct with 70 Hz corner Switchable phase r...

Страница 10: ... because of the often relatively thin cables of these devices there might be a significant voltage drop on the cable which might impair the proper operation of MPA RS 01 Other USB power sources may be used under the following circumstances a proper DC voltage within the range of 5 5 5 V a current capacity of min 1 A THE FUSE The fuse of this appliance is soldered in place and accessible from the i...

Страница 11: ...s gold plated XLR connectors They are marked LEFT CH 1 and RIGHT CH 2 The inputs accept balanced as well as unbalanced audio signals XLR wiring corresponds to international standard with Pin 1 ground Pin 2 in phase and Pin 3 out of phase If an unbalanced source must be connected one of the phases preferably the negative one should be connected to signal ground see page 8 ...

Страница 12: ...m power during operation produces low frequency voltage swing at the MPA RS 01 s output To avoid damage of monitor loudspeakers or other equipment the subsequent input should be muted when activating or deactivating the phantom power NOTE If unbalanced equipment such as synthesizers etc is connected to the MPA RS 01 s inputs the 48V phantom voltage might cause damage if the connection is not made ...

Страница 13: ...han the theoretically achievable minimum The gain bandwidth product GBW and the slew rate are basically responsible for the sonic quality of an amplifier The higher they are the more transparent the sound becomes Slew rate is 10V s while the GBW is calculated from the frequency response at a certain gain ratio The MPA RS 01 s internal linear frequency response at 60 dB gain exceeds 200 kHz The res...

Страница 14: ... gain switches a seven segment LED bar graph displays the momentary output level The overall display range is 36 dB The dynamic characteristics are according to DIN specifications with a rise time of 10 milliseconds and 1 5 seconds release time for a 20 dB level change The display s sensitivity can be adjusted on the main PCB to meet user specific requirements see page 17 for details Ex works the ...

Страница 15: ...utput impedance is approx 30 ohms HINT In case of unbalanced termination of these outputs pin 3 of the XLR connector may not be shortened but must be left open Signal level is reduced by 6 dB THE OUTPUTS unbalanced MPA RS 01 offers additional unbalanced outputs with gold plated RCA connectors They are situated on the rear of the unit and marked L 1 and R 2 Please note that the level on these outpu...

Страница 16: ...yle size T10 or a 2 5 mm hex allen key You should by all means DISCONNECT THE POWER SUPPLY DISMANTLING To avoid damages please follow the instruction below 1 screw off both upper screws on the front panel 2 screw off both upper screws on the back panel 3 now lift the upper lid 4 make your personal jumper settings Assemble the unit in reverse order ...

Страница 17: ...17 JUMPER SETTING MPA RS 01 ...

Страница 18: ...Hz 3 dB 12 dB oct 2 pol filter Internal Bandwidth 3 dB 200 kHz 60 dB gain Frequency range 5 Hz 40 kHz 0 5 dB THD N 0 002 G 0dB 0 03 G 60 dB Noise Rin 200 Ohm 100 dB G 0dB 69 dB G 60dB max output level sym 20 dBu in RL 600 Ohm Output CMRR 15 kHz 60 dB Level display 7 LEDs range 36 dB adjustable Characteristic referred to DIN Attack 10ms Release 1 5 s 20 dB Internal voltages Audio voltages 15 Volt P...

Страница 19: ...f conformity with regard to electromagnetic compatibility the following harmonized standards are applied EN 50081 1 1992 Generic emission standard EN 50082 1 1992 Generic immunity standard Product family standard for audio video audio visual entertainment apparatus EN 55013 2001 EN 61000 3 2 2000 EN 55020 2002 EN 61000 3 3 1995 2011 65 EU RoHS directive 2012 19 EU WEEE directive Member No DE 26076...

Страница 20: ...of the warranty If it is necessary please dispatch your item to Lake People electronic GmbH Fon 49 0 7531 73678 Turmstrasse 7a Fax 49 0 7531 74998 D 78467 Konstanz E Mail info lake people de Your warranty claim begins with the date of purchase which should be denoted on your proof of purchase In case of return do not forget to include the receipt of sales or a copy of the receipt Please also inclu...

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