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3

MC3.1

 - Monitor Controller

COPYRIGHT

This manual is copyrighted © 2016 by Drawmer Electronics Ltd. With all rights reserved. Under copyright
laws, no part of this publication may be reproduced, transmitted, stored in a retrieval system or translated
into any language in any form by any means, mechanical, optical, electronic, recording, or otherwise,
without the written permission of Drawmer Electronics Ltd.

Drawmer Electronics Ltd., warrants the Drawmer 

MC3.1 Monitor

Controller 

to conform substantially to the specifications of this

manual for a period of one year from the original date of purchase

when used in accordance with the specifications detailed in this

manual. In the case of a valid warranty claim, your sole and exclusive
remedy and Drawmer’s entire liability under any theory of liability will

be to, at Drawmer’s discretion, repair or replace the product without

charge, or, if not possible, to refund the purchase price to you. This

warranty is not transferable. It applies only to the original purchaser

of the product.

For warranty service please call your local Drawmer dealer.

Alternatively call Drawmer Electronics Ltd. at +44 (0)1709 527574.

Then ship the defective product, with transportation and insurance

charges pre-paid, to Drawmer Electronics Ltd., Coleman Street,

Parkgate, Rotherham, S62 6EL UK. Write the RA number in large

letters in a prominent position on the shipping box. Enclose your

name, address, telephone number, copy of the original sales invoice

and a detailed description of the problem. Drawmer will not accept
responsibility for loss or damage during transit.

This warranty is void if the product has been damaged by misuse,

modification, unauthorised repair or installed with other equipment

that proved to be faulty.

THIS WARRANTY IS IN LIEU OF ALL WARRANTIES, WHETHER

ORAL OR WRITTEN, EXPRESSED, IMPLIED OR STATUTORY.

DRAW MER  MAKES NO OTHER W ARRANTY EITHER

EXPRESS OR IMPLIED, INCLUDING, WITHOUT LIMITATION,

ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS

FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.

PURCHASER’S SOLE AND EXCLUSIVE REMEDY UNDER THIS

WARRANTY SHALL BE REPAIR OR REPLACEMENT AS

SPECIFIED HEREIN.

IN NO EVENT WILL DRAWMER ELECTRONICS LTD. BE LIABLE

FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL OR

CONSEQUENTIAL DAMAGES RESULTING FROM ANY
DEFECT IN THE PRODUCT, INCLUDING LOST PROFITS,

DAMAGE TO PROPERTY, AND, TO THE EXTENT PERMITTED

BY LAW, DAMAGE FOR PERSONAL INJURY, EVEN IF

DRAWMER HAS BEEN ADVISED OF THE POSSIBILITY OF

SUCH DAMAGES.

Some states and specific countries do not allow the exclusion of

implied warranties or limitations on how long an implied warranty may

last, so the above limitations may not apply to you. This warranty gives

you specific legal rights. You may have additional rights that vary from

state to state, and country to country.

For the USA

FEDERAL COMMUNICATIONS COMMISSION RADIO

FREQUENCY INTERFERENCE STATEMENT

This equipment has been tested and found to comply with the limits
for a Class B digital device, pursuant to Part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment
generates, uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause
harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation.
If this equipment does cause interference to radio or television
reception, which can be determined by turning the equipment off an
on, then the user is encouraged to try to correct the interference by
one or more of the following measures:

Re-orient or relocate the receiving antenna.

Increase the separation between the equipment and  the receiver.

Connect the equipment into an outlet on a circuit  different from that
to which the receiver is connected.

Consult the dealer or an experienced radio/TV technician for help.

Unauthorised changes or modification to this system can void the
users’ authority to operate this equipment.
This equipment requires shielded interface cables in order to meet
FCC class B limit.

For Canada

CLASS B                                    NOTICE

This digital apparatus does not exceed the Class B limits for radio
noise emissions set out in the Radio Interference Regulations of the
Canadian Department of Communications.

CLASSE B                                    AVIS

Cet appareil numérique ne dépasse pas les limites de la classe B au
niveau des émissions de bruits radioélectriques fixés dans le
Règlement des signaux parasites par le ministère Canadien des
Communications.

In the interests of product development, Drawmer reserve the right to modify

or improve specifications of this product at any time, without prior notice.

SAFETY CONSIDERATIONS

CAUTION - SERVICING

DO NOT OPEN. REFER ALL SERVICING TO QUALIFIED SERVICE PERSONNEL.

WARNING

TO REDUCE RISK OF FIRE/ELECTRIC SHOCK DO NOT EXPOSE THIS EQUIPMENT TO MOISTURE.

WARNING

DO NOT ATTEMPT TO CHANGE OR TAMPER WITH THE SUPPLIED POWER SUPPLY OR CABLES.

WARNING

THERE ARE NO REPLACEABLE FUSES WITHIN EITHER THE MC3.1 OR IT’S SUPPLIED POW ER

SUPPLY. IF FOR ANY REASON THE MC3.1 CEASES TO W ORK DO NOT ATTEMPT TO MEND IT -

CONTACT DRAWMER TO ARRANGE FOR A REPAIR/REPLACEMENT.

ONE YEAR LIMITED WARRANTY

Summary of Contents for MC 3.1

Page 1: ...Power Connection Security Portable Appliance Testing Audio Connection Typical Connection Guide Chapter 2 Control Description Contol Description Intro Monitor Calibration Mix Checking Tips Chapter 3 General Information If a fault develops Contacting Drawmer Specification Block Diagram 3 3 3 4 6 7 7 7 8 9 10 18 22 26 26 26 27 ...

Page 2: ...2 DRAWMER ...

Page 3: ...countries do not allow the exclusion of impliedwarranties orlimitationsonhow longanimplied warrantymay last sothe abovelimitations maynot applytoyou This warrantygives youspecificlegalrights Youmayhaveadditionalrightsthat varyfrom stateto state andcountry to country For the USA FEDERAL COMMUNICATIONS COMMISSION RADIO FREQUENCY INTERFERENCE STATEMENT Thisequipment has beentested and found tocomplyw...

Page 4: ... dedicated cue mix output is also available A secondary preset volume control on the front provides repeatable calibrated output level for the monitors so that at the flick of a switch the engineer can hear the mix at the same predetermined volume time after time without having to meticulously adjust controls The MC3 1 incorporates three stereo balanced speaker outputs plus a dedicated mono speake...

Page 5: ...anel 3 5mm AUX Input Level Control for connecting MP3 player smartphone or tablet etc Cue Level Control adjusts the volume for the Artist s Monitors Built In Talkback with Level Control Internal or External Microphone Switching via Desktop or Footswitch a Mono Output Jack Internal Routing to Headphone and Cue Outputs Comprehensive Mix Checking facilities Including Low Mid High Solo Dim L R Mute Ph...

Page 6: ...sk the speaker trims on the base of the unit will not be accessible and so the calibration procedure should be carried out before fastening the MC3 1 in place see Monitor Calibration Drill four holes into the desk at 4mm in diameter and to the dimensions as shown in the diagram Note that in the diagram the MC3 1 is viewed from above Pushingfourscrewsthroughtheundersid of the desk screw the MC3 1 i...

Page 7: ...ied Before connecting the MC3 1 to the power supply ensure that all knobs are turned off i e fully anticlockwise and that the Level Switch just below the main volume control is set to Knob A switch next to the d c power inlet on the rear of the unit switches the power on off POWER CONNECTION PORTABLE APPLIANCE TESTING To undergo a Portable Appliance Testing procedure commonly known as PAT PAT Insp...

Page 8: ... of the signal cables should be connected to the chassis connection on the XLR connector as opposed to connecting to pin1 The MC3 1 conforms to the EMC standards Ground Loops If ground loop problems are encountered never disconnect the mains earth but instead try disconnecting the signal screen on one end of each of the cables connecting the outputs of the MC3 1 to the patchbay If such measures ar...

Page 9: ...9 MC3 1 Monitor Controller TYPICAL CONNECTION GUIDE ...

Page 10: ...1 0 DRAWMER CONTROL DESCRIPTION CHAPTER 2 ...

Page 11: ...ted talkback function including inbuilt microphone external microphone port gain level control and external footswitch connector External Mic Switch When active disengages the inbuilt front panel microphone and routes the operator s voice through an external microphone not supplied which is plugged into the rear panel see Talkback Active Switch When active engages either the inbuilt or external mi...

Page 12: ...itor could be attached to C so with the C switch active SUB should be disengaged Note that each speaker output has individual level trimming on the base of the unit so that precise monitor level matching can be achieved see sections and also the Monitor Calibration section MASTER VOLUME The Monitor Volume control adjusts the signal level of both stereo channels for all speaker outputs The Volume k...

Page 13: ...ible A POWER LED is located within this section and when lit indicates that the unit is switched on To turn the MC3 1 on see the mains input section HEADPHONES The MC3 1 has two dedicated headphone outputs via 1 4 TRS jacks located on the front edge each with individual source select and level control Note that they have their own level control and are not affected by the main monitor volume knob ...

Page 14: ...ircuit is completely relay bypassed Phase Reverse Inverts the polarity of the signal on the Left Channel and is used primarily to outline any phase problems that may be occurring in the mix recording such as phase cancellation or an unbalanced stereo signal As the switch is toggled any phase issues will become more apparent and easier to identify Left Right Swap Swaps the Left and Right channels o...

Page 15: ...Left or Right Cut whilst using headphones the signal is not 100 panned one way or the other i e the signal centre moves to the side but is not completely removed from the opposite ear of the headphone this is so that the Left Right Cut sounds a little more natural after all if listening through speakers with only the left speaker active some of the signal well reach the right ear a few millisecond...

Page 16: ...ut SUB MONO are found on the rear of the unit all in the form of Neutrik 3 pin XLR s Each of these outputs has an individual Left Right Mono trim potentiometer on the underside of the unit to enable easy and accurate monitor level room matching throughout see Monitor Calibration Each output is activated by the Speakers switches see and can be activated individually or simultaneously and in any con...

Page 17: ...ing acoustic ensembles where the performers may not wish or need to wear headphones The output also allows for routing into a separate channel of a DAW or other recording facility to allow for information overdubs to be added to a recording SPEAKER CALIBRATIONTRIM CONTROLS On the underside of the MC3 1 there are seven rotary controls that allow the individual speaker level calibration of your syst...

Page 18: ...eferred type You can purchase an SPL meter from most electronic stores or search the internet in stores such as Amazon with prices ranging from 25 to 800 Radio Shack is a good source for reasonably priced SPL meters in the USA though to get better results you may consider a more expensive SPL meter such as Galaxy Gold Line Nady etc The ideal meter should have the industry standard C weighted curve...

Page 19: ...e level to 85dB the standard listening level for film tv and music however due to the sound being altered by the size of the room this can alter essentially the smaller your room is the lower your listening level should be down to around 76dB The following table should give an idea of the sound pressure level to use for your environment Cubic Feet 20 000 10 000 to 19 999 5 000 to 9 999 1 500 to 4 ...

Page 20: ...of the MC3 1 to 12 0 clock and leave it there throughout the calibration procedure this will be the position that provides the 85dB listening level from now on 6 Turn the system on and play the 500 Hz 2 5 kHz bandwidth limited pink noise at 20 dBFS Select the required Source on the front of the MC3 1 I P1 I P2 I P3 AUX or DIGI You should not hear it yet 7 Activate the A Speaker by having only the ...

Page 21: ... readings should be pretty close and only require fine adjustment 16 Now the system is calibrated it is time to set the PRESET volume control Set the Master Volume switch to PRESET and with only one set of speakers active in the Speaker Select switches adjust the preset level on the front of the MC3 1 using a screwdriver until the SPL meter reads your desired listening level 16 You are finished an...

Page 22: ...ould be If something is too quiet or loud adjust its volume or use E Q to fix it If the mix sounds good at low levels it s likely that it will when loud Note that on the MC3 1 it is better to lower the volume level using the DIM switch and then turn the volume up rather than only turning the volume down as you maintain greater control over the volume as well as better left right channel matching I...

Page 23: ...ny cases the low frequencies will be put through a crossover and summed to mono before being sent to the sub such as in a home theatre system for example Monogising is also necessary when testing the audio for use on nonstandard applications such as for broadcast or mobile phone In addition monogising will highlight phase problems In some cases when you activate the Mono switch you may hear comb f...

Page 24: ... simple Being able to audition the side signal is particularly useful for judging the quality and quantity of any ambience or reverberation in a stereo mix It is also an invaluable facility if the stereo recording has timing differences between channels such as caused by an azimuth error on a tape machine or for aligning a pair of desk channels for use with X Y stereo mic pairs In both cases liste...

Page 25: ...ransient fidelity Moreover cable lengths of tens of meters should not be an issue Furthermore it makes it possible to introduce mix checking features that would otherwise be missing The disadvantage with active monitor controllers is that the electronics have the potential to introduce noise and distortion Designing a clean monitor control system is far from simple however using only the very best...

Page 26: ...from Drawmer or their authorised representative For service claims under the warranty agreement a service Returns Authorisation RA number will be issued Write this RA number in large letters in a prominent position on the shipping box Enclose your name address telephone number copy of the original sales invoice and a detailed description of the problem Authorised returns should be prepaid and must...

Page 27: ...2 7 MC3 1 Monitor Controller Ref 1v00 A 18 08 16 BLOCK DIAGRAM ...

Page 28: ...DRAWMER Drawmer Electronics Ltd Coleman St Parkgate Rotherham South Yorkshire U K ...

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