Summary of MPA RS 01
Page 1
1 microphone pre-amplifier mpa rs 01 user´s manual.
Page 2: Content
2 content theme page about lake people 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
Page 3: Lake People Product !
3 cordial thanks for your decision in favour of a lake people product ! Lake people electronic gmbh develops, manufactures and distributes products in the professional range, for broadcast, television, airports, exhibition halls, festival venues, theatres, large-scale installations, private studios ...
Page 4: Turmstrasse 7A
4 … and if it doesn't work like it should ? Lake people devices are covered by a 24-month warranty. In case of any malfunction during this period, they can be shipped to the manufacturer directly. Of course, the client will benefit from lake people's full technical support even when warranty has exp...
Page 5: Warning
5 general safety instructions warning for your protection, please read the following: water, liquids, moisture this appliance should not be used near water or other sources of liquids. Care should be taken so that objects do not fall and liquids are not spilled into the enclosure through openings. P...
Page 6: Service / Repair:
6 service / repair: to reduce the risk of fire or electric shock, the user should not attempt to service the appliance beyond the measures described in the operating manual. All other servicing or repair should be referred to qualified personnel !! Electromagnetic compatibility this unit conforms to...
Page 7: The Earth/ground Concept
7 the earth / grounding concept the earth/ground concept this unit is powered by an external source and thus is not including a power cord with ground/earth facilities. The internal reference point (ground) is connected to the case !! Xlr groud-lift jumper (accessible from the inside, see also page ...
Page 8: Connection / Connectors
8 l(ift): the interconnection between pin 1 and ground is open. High frequency interferences are deflected to the case via 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...
Page 9: General
9 general the lake people mpa rs 01 is an excellent and extremely low-noise 2-channel microphone preamplifier in a compact “desk-top” case. Due to its versatile concept and high level capability it is also suitable for line signal boosting and balancing. Gain is controlled with a twelve-step rotary ...
Page 10: Earth And Groud
10 earth and groud this unit is operated with an external wall plug adaptor and so is not grounded by a 3-wire mains cord. The internal reference point (ground) is connected to the case and may be lifted by means of a jumper (see page 17). Sometimes it may be helpful to additionally connect the case...
Page 11: The Power Switch
11 the power switch the unit is activated by means of the power switch. Power-on status is indicated by the green “on” led. The inputs the back mounted balanced inputs appear as gold plated xlr connectors. They are marked “left ch 1” and “right ch 2”. The inputs accept balanced as well as unbalanced...
Page 12: Phantom Powering
12 phantom powering the use of professional condenser microphones requires so-called phantom powering. The mpa rs 01 offers stabilized 48v phantom powering, which is activated by the "48 v"-button on the front panel. This voltage is applied to pins 2 and 3 via matched 6.8 kohm resistors of both inpu...
Page 13: Gain Setting
13 gain setting the input signal applied to the xlr terminal is fed to an extremely low- noise integrated instrumentation amplifier. Gain is set by the "gain"-rotary switch in 6db steps from 0 to +66 db. The deviation from the indicated value is less than +/- 0.3 db. The amplifier stage: theory and ...
Page 14: Low Cut
14 low cut in order to reduce undesired frequencies such as wind or microphone handling noise, the mpa rs 01 offers a low-cut filter with a corner frequency of 70 hz. It is inserted into the signal path by the "low-cut"-switch situated on the front panel. Active state is displayed by the "70 hz"- le...
Page 15: The Outputs (Balanced)
15 the outputs (balanced) each channel offers a balanced output with gold plated xlr-type connectors. They are situated on the rear of the unit and marked "left / ch 1” and “right / ch 2”. The polarity meets aes 14-1992: 1 = ground, 2 = (+) phase, 3 = (-) phase the output impedance is approx. 30 ohm...
Page 16: Dismantling
16 dismantling / jumper settings hint: here we are talking about internal adjustments inside your mpa rs 01. You are in need of a screw drivers torx style 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 instruc...
Page 17: Jumper Setting Mpa Rs 01
17 jumper setting mpa rs 01.
Page 18: Technical Data Mpa Rs 01
18 technical data mpa rs 01 all measurement rms unweighted, 20 hz - 20 khz, relativ to 0 dbu as not otherwise noted number of channels: 2 input: electronically balanced input impedance: 5 kohm input cmrr (15 khz): (g = 0 db) / (g = +60 db) max. Input level: > +20 dbu gain: 0...+66 db in 12 steps of ...
Page 19: Conformity Statement
19 ec conformity statement : we herewith declare that the following unit name: violectric mpa rs 01 serial no. : -all - is in conformity with the following ec directives: 2006/95/eg low voltage directive 20014/30/ec emc directive en 60065:2002+a12:2011 security directives for audio-, jis c6065:2013 ...
Page 20
20 warranty since 1986 we are constructing and manufacturing sophisticated electronics for ambitious customers. Since the early beginnings we are trying hard by accompanying measures, the use of 1st choice components and multiple quality checks during production to avoid faults at large. We are quit...