BM 6A mkII

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1 Read these instructions.2 Keep these instructions.3 Heed all warnings.4 Follow all instructions.5 Do not use this apparatus near water.6 Clean only with dry cloth.7 Install in accordance with the manufacturer's

instructions.8 Do not install near any heat sources such

as radiators, heat registers, stoves, or otherapparatus (including amplifiers) that produceheat.

9 Do not defeat the safety purpose of the polarized or grounding-type plug. Apolarized plug has two blades with one wider than the other. A grounding type plug has two blades and a third grounding prong.The wide blade or the third prong are providedfor your safety. If the provided plug does not fitinto your outlet, consult an electrician forreplacement of the obsolete outlet.

10 Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.

11 Only use attachments/accessories specifiedby the manufacturer.

12 Use only with the cart, stand, tripod,bracket, or table specified by themanufacturer, or sold with theapparatus. When a cart is used, use

caution when moving the cart/apparatuscombination to avoid injury from tip-over.

13 Unplug this apparatus during lightning storms or when unused for long periods of time.

14 Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objectshave fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or hasbeen dropped.

Warning!• To reduce the risk of fire or electrical shock,

do not expose this equipment to dripping orsplashing and ensure that no objects filledwith liquids, such as vases, are placed on theequipment.

• This apparatus must be earthed.• Use a three wire grounding type line cord

like the one supplied with the product.• Be advised that different operating voltages

require the use of different types of line cord and attachment plugs.

• Always observe the local safety regulations.Ensure that the factory-set powerrequirements for the device (refer to the labelon the back of the monitor) corresponds to themains supply in your region.

• This equipment should be installed near the socket outlet and disconnection of the device should be easily accessible.

• To completely disconnect from AC mains,disconnect the power supply cord from the ACreceptacle.

• The mains plug of the power supply shallremain readily operable.

• Do not install in a confined space.• Do not open the unit - risk of electric shock

inside.

Caution:You are cautioned that any change ormodifications not expressly approved in thismanual could void your authority to operate thisequipment.

Service• There are no user-serviceable parts inside. • All service must be performed by qualified

personnel.

The lightning flash with an arrowheadsymbol within an equilateral triangle, isintended to alert the user to the presence of uninsulated "dangerous volt-

age" within the product's enclosure that may be ofsufficient magnitude to constitute a risk of electric shock to persons.

The exclamation point within anequilateral triangle is intended to alertthe user to the presence of importantoperating and maintenance (servicing)

instructions in the literature accompanying theproduct.

IMPORTANT SAFETY INSTRUCTIONS

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TABLE OF CONTENTS

INTRODUCTION

Important Safety Instructions &Certificate of conformity . . . . . . . . . . . .aTable of Contents . . . . . . . . . . . . . . . . .3Introduction . . . . . . . . . . . . . . . . . . . . . .4

OPERATING

Rear Panel - Overview . . . . . . . . . . . . .5Setting Up . . . . . . . . . . . . . . . . . . . . . .6Indicators . . . . . . . . . . . . . . . . . . . . . . .7Positioning . . . . . . . . . . . . . . . . . . . . . .7

MISCELLANEOUS

Troubleshooting . . . . . . . . . . . . . . . . . .8Care . . . . . . . . . . . . . . . . . . . . . . . . . . .8Options . . . . . . . . . . . . . . . . . . . . . . . . .8Service . . . . . . . . . . . . . . . . . . . . . . . . .8Technical specifications . . . . . . . . . . . .9

TC Electronic, Sindalsvej 34, DK-8240 Risskov – tcdk@tcelectronic.com Rev 1.00English Version

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INTRODUCTION

Congratulations on your purchase of the Dynaudio Acoustics BM 6A mkII activemonitor system. With the right care and attention it will provide many years ofexcellent and trouble free audio reproduction. It is most important, however, thatyou take a few minutes at this early stage of your BM 6A mkII’s life, to read thismanual. It contains essential information to make you get the best from your newmonitors.

Break-In timeThe transducers of your BM 6A mkII monitor will achieve better sound quality afterbreaking in. Especially after the first hours of use, you may notice a significantadvance in sound quality. Still after first few hours improvement take place, butlesser noticeable.

The latest manual revision is always available at our website:www.dynaudioacoustics.com

For support please also refer to: www.dynaudioacoustics.com

Please enjoy

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OVERVIEW - REAR PANEL

Correct setup and connections is essential to achieve optimal performance from yourmonitors. Please follow the instructions on the following pages.

1. AC power Input and fuse

2. Power On/Off switch

3. Balanced analog Input

4. High Pass filter switch

5. Level trim

6. LF - Low filter setting

7. MF - Mid filter setting

8. HF - Hi filter setting

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SETTING UP1/2. Power On/Off switch/AC Power InBefore switching on, make sure Mains Voltagematches your areas Mains Voltage specification.Replace fuse only with the fuse-type marked onthe rear-panel label.

3. Balanced analog InputAudio Input is via a female XLR connector. TheInput is electronically balanced with followingconnections. The connections are printed onthe rear for easy reference.

If your signal source is unbalanced, usually theunused pin is connected to ground. This isnormally done inside the connecting cable.Special adapters (not supplied) can be boughtthat converts xlr input to single ended RCA typeinput. For best result use only good qualityscreened cables and connectors.

SwitchesOn the rear of the monitor you will find 5switches for setting up the monitor for optimumperformance in different acoustic environments.Each switch is explained in the following.

4. High Pass filter switchThis switch sets the lower cut-off frequency ofthe monitor. It is used to match the monitor to asubwoofer. You can select between 60Hz or80Hz X-over. Flat is used in case you do notuse a subwoofer to assist your monitors. Whenused with a subwoofer it is recommended touse either 60Hz or 80Hz filter, thus allowing ahigher undistorted sound-pressure level.

0

+

-

5. Level TrimUse this switch to match the sensitivity of theBM 6A mkII monitor to your source.

High-output SourceIf your source has a high output, set switch tothe -10 position to reduce sensitivity by 10dB.

Low-output sourceIf your source has a low output, set switch tothe +4 position to gain 4dB more sensitivity.

6. LFThis switch controls the bass gain level usingshelf-type EQ. The level can be set to +2dB,0dB or -2dB.This filter is used to adjust for the proximity ofboundaries, so if positioned close to wall orcorner, use the -2dB setting. If positioned farfrom walls use the +2dB or 0 position,depending on other equipment, and personaltaste.

7. MFThis switch sets a notch filter, used tocompensate for the acoustic effect of a console.Such placement usually results in a responsepeak in lower midrange. The MF switchactivates a bell shaped notch filter, which cancompensate. Use either the -2 or the -4dBsetting. You may experiment finding the setting,which provides the flattest response.

8. HFThis switch controls the Treble level and it isused to match the high end of the monitor toyour other electronic equipment, and youracoustical environment. Use the settingproviding the preferred timbre. If the sound istoo bright; try to set to -1dB to reduce treble by1dB. If too dull sound, use +1dB setting to raisethe treble by 1dB.

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INDICATORS & POSITIONING

IndicatorsOn the front you will find 2 diodes. These arepositioned just above the Dynaudio Logo.

The green power diode indicates speakeron/off status. Green indicates; “power on”.

The second diode has two functions.When the output stage is close to clipping

the LED will light up orange. And it will light upred when the amplifier gets too hot. At thesame time the monitor will be muted, in order toreduce the temperature.

ProtectionThe BM 6A mkII monitor has several built inprotection systems to reduce the risk of hazardor damage due to overloading.Both power amplifiers have thermal protection.This activates if a problem should occur, andhelps protect both the electronics and theloudspeaker drivers.

There is also a thermal sensor measuring thetemperature on the heat sink. An electroniccircuit will mute the signal when too hightemperature is reached. The protection diodeon the front will light up when this happens.

On the tweeter output there is an overloadprotection to prevent burning the tweeter driverin case of overloading. This circuit will mute thetweeter signal if too much current is fed to thetweeter.

PositioningThe BM 6A mkII is designed as a near to mid-field monitor and can be equally well used inboth stereo and surround setups. Optimalperformance is achieved when positioned 1-3meters from the listener. It can be placed on stands or on the meterbridge of a console provided that the meterbridge is sufficiently sturdy. For best results thespeakers may be aimed towards the listener inboth vertical and horizontal planes.

Note:Be aware that proper air circulation around themonitor for sufficient cooling is necessary. Alsonotice that the heat sink is designed to providemaximum cooling when the monitor ispositioned vertically.

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MISCELLANEOUS

TroubleshootingIf Power LED lights green and no sound, checkyour input signal f.ex. by switching speakers.

If power LED does not light at all and no sound,check the fuse. If replaced and still no soundcontact your Dynaudio Acoustics Dealer.

If protection LED lights red check thetemperature of the heat sink. If it feels hot turnoff the speaker and wait for some 10 minutes toallow the amplifier to cool off. Turn it on again.If it works now it is ok, but you may need moreair circulation around your speaker to avoidoverheating to take place again.

CareComponents of the highest quality is used inyour BM 6A mkII. This assures years of troublefree operation. Following precautions shouldstill be made though.Avoid running the system into severe clipping.Even there is an advanced protection system,you may be able to destroy your speakers bysevere overpowering. When a noticeabledistortion occurs, please turn down the level toyour speakers.

Avoid hot plugging the equipment connected tothe monitors. Always turn off the speaker andother equipment when plugging or unpluggingsignals, or switching equipment on or off.Do not touch the drive units by hand. Thetweeter especially uses a very fine fabric domewith a ultra thin coating.

Options The BM 6A mkII may be combined with aDynaudio Acoustics subwoofer for extendedbass performance, and higher spl if highpassfilter is used. See Setting Up.

ServiceThere are no user serviceable parts inside themonitor. If service is required please contactservice via:

www.tcsupport.tc

or

TC ElectronicSindalsvej 34DK-8240 RisskovDenmark

Tel: +45 87427000

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TECHNICAL SPECIFICATIONS

System

Frequency Response (+/- 3 dB)

Input level for 85 dB SPL @1m

Input Impedance

Power consumption

Amplifier power

Bass Principle

Vent tuning frequency

Internal Cabinet Volume

Crossover Frequency

Crossover Slope

Tweeter

Woofer

Weight

Dimensions (W x H x D)

Two-way Active Nearfield Monitor

40Hz - 21kHz

-14dBu RMS @ 0dB setting

65kOhm each branch

Idle: 15W / Max: 130W

Tweeter: 50W / Woofer: 100W

Bass reflex

37Hz

11.7 liters

1500Hz

6dB/oct

Esotec 28 mm/1.1" soft dome, rear chamber, Magnetic fluid. 4 mm alu front, pure alu wire voice coil

170 mm/6.5", One-piece thermo formed poly-prop cone, 75 mm/3" pure alu voice coil

10.5kg / 23.1lbs

203 x 335 x 327mm / 8" x 13.2" x 12.9"

Prod

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- 45

5 47

6 A