Dynaudio BM9S II Owner's manual

Dynaudio
Brand
Dynaudio
Model
BM9S II
Category
Subwoofers
Type
Owner's manual

Dynaudio BM9S II is a high-end subwoofer designed for professional audio applications, offering a powerful and accurate low-frequency response. With its 9-inch woofer and built-in amplifier, it delivers deep, clear bass that can be tailored to your specific needs. The BM9S II features a variety of adjustable settings, including a continuously variable low-pass filter, phase control, and two operation modes (LFE and Slave), making it easy to integrate into any audio system.

Dynaudio BM9S II is a high-end subwoofer designed for professional audio applications, offering a powerful and accurate low-frequency response. With its 9-inch woofer and built-in amplifier, it delivers deep, clear bass that can be tailored to your specific needs. The BM9S II features a variety of adjustable settings, including a continuously variable low-pass filter, phase control, and two operation modes (LFE and Slave), making it easy to integrate into any audio system.

BM9SII – Owner’s manual
Dynaudio Professional BM9SII manual.indd 1 2014-02-24 14:45
Dynaudio Professional BM9SII manual.indd 2 2014-02-24 14:45
Introduction
Owner’s manual 1
Introduction
Important safety instructions
Thelightningashwithanarrowheadsymbolwithinan
equilateral triangle, is intended to alert the user to the
presence of uninsulated “dangerous voltage” within
theproduct’senclosurethatmaybeofsufcientmag-
nitude to constitute a risk of electric shock to persons.
The exclamation point within an equilateral triangle is
intended to alert the user to the presence of important
operating and maintenance (servicing) instructions in
theliteratureaccompanyingtheproduct.
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.Do not block any ventilation openings. Install in accor-
dance with the manufacturer’s instructions.
8.Do not install near any heat sources such as radiators,
heat registers, stoves, or other apparatus (including ampli-
ers)thatproduceheat.
9.Do not defeat the safety purpose of the polarized or
grounding-typeplug.Apolarizedplughastwobladeswith
onewiderthantheother.Agroundingtypeplughastwo
bladesandathirdgroundingprong.Thewidebladeorthe
third prong are provided for your safety. If the provided
plugdoesnottintoyouroutlet,consultanelectricianfor
replacement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speciedbythemanu-
facturer.
12.Useonlywiththecart,stand,tripod,bracket,orta-
blespeciedbythemanufacturer,orsoldwiththe
apparatus. When a cart is used use caution when moving
the cart/apparatus combination to avoid injury from tip-
over.
13. Unplug this apparatus during lightning storms or when un-
used for long periods of time.
14.Referallservicingtoqualied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objectshavefallenintotheapparatus,
theapparatushasbeenexposedtorainormoisture,does
notoperatenormally,orhasbeendropped.
15.WARNING:Toreducetheriskofreorelectricshock,this
apparatusshouldnotbeexposedtorainormoistureand
objects lled with liquids, such as vases, should not be
placed on this apparatus.
16.Tocompletelydisconnectthisequipmentfromthemains,
disconnectthepowersupplycordplugfromtherecepta-
cle.
17.The mains plug of the power supply cord shall remain
readilyoperable.
WARNING
RISK OF ELECTRIC SHOCK! DO NOT OPEN!
To reduce the risk of electric shock, do not remove the
back paneland do notexpose the apparatus to rain
or moisture. No user serviceable parts inside. Refer
servicingtoqualiedpersonnel.
Signal words
– Caution – Indicates in combination with a safety sign a
potentiallyhazardoussituationwhich,ifnotavoided,could
resultinminorormoderateinjuryordamagetoequipment.
– Warning– Indicatesin combinationwitha safetysign a
potentiallyhazardoussituationwhich,ifnotavoided,could
resultindeathorseriousinjury.
– Danger – Indicates in combination with a safety sign a
hazardous situation which, if not avoided, will result in
deathorseriousinjury.
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Introduction
2 BM9SII
Dynaudio Professional BM9SII manual.indd 2 2014-02-24 14:45
Introduction
Owner’s manual 3
About this manual
Thismanualisdivided inthreemainchapters,inwhichyou
can nd all the information needed to operate the BM9S II
successfully:
– Before operation: Learn all about unpacking and con-
nectingthe subwoofer.The controlsandconnections on
thebackpanelarealsodescribedhere.
– Operation:In thischapter youwill learnhow tooperate
thesubwooferingeneralandhowtopositionitproperlyfor
optimum performance.
– Optimizing settings/Troubleshooting: Here detailed ex-
planationscanbefoundonhowtooptimizethesettingsin
ordertoachievethemaximumsoundquality.
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Before operation
4 BM9SII
Before operation
Unpacking
Before operation
4 Dynaudio Acoustics BM9S
Unpacking
Unpacking the subwoofer
1. Unpack the subwoofer on a clean, even and soft area; floor carpeting is very
suitable.
2. The packaging should be opened from the top. Remove all accessories that
come packed with the subwoofer (such as AC power cord and grille). Do not
remove the top part of the protective material.
3. With the protective material still in place but with accessories removed, carefully
tilt the packaging on its side and tilt again to turn it upside-down. Ensure that no
part of the top-cover is obstructing the opening at the top.
4. The outer packaging can now be lifted away from the subwoofer itself. Remove
the protective material that now is on top.
5. Open the bag and remove such from around the base of the subwoofer.
6. Again, carefully tilt the subwoofer on its side and again to turn it onto its feet. Note
that the top part of the protective material will now come off easily so ensure that
the subwoofer doesn’t drop or slide away in the process.
Check that the contents are complete:
• Subwoofer: The factory-set power requirements (refer to label on rear of
subwoofer) should correspond for the region where the subwoofer was purchased.
Refer also to chapter “Important Safety Instructions” on page 1.
• Front baffle grille.
• AC mains lead. The supplied lead should be suitable for the region where the
subwoofer was purchased.
• Owners Manual.
Grille
The subwoofer can be operated without the grille. However, it is recommended that
the grille is mounted during normal use to help prevent accidental damage or dirt
settling on the cone of the loudspeaker. With subwoofers, the influence of the grille on
the sound is virtually negligible.
To remove the grille:
X Gently pull the grille at all corners.
To fit the grille:
X Line up the studs with the corresponding front baffle holes.
X Gently push the grille in at all corners.
Note:
• Be careful when mounting the grille not to touch the cone of the loudspeaker itself.
1
2
3
Unpacking the subwoofer
1.Unpack the subwoofer on a clean, even and soft area.
Floorcarpetingisverysuitable.
2.Thepackagingshouldbeopenedfromthetop.Removeall
accessoriesthat comepackedwith thesubwoofer (such
asACpowercordandgrille).Donotremovethetoppart
of the protective material.
3.Withtheprotectivematerialstillinplacebutwithaccesso-
riesremoved, carefullytilt thepackaging onits sideand
tilt again to turn it upside-down. Ensure that no part of the
top-coverisobstructingtheopeningatthetop.
4.Theouterpackagingcannowbeliftedawayfromthesub-
woofer itself. Remove the protective material that now is
on top.
5.Openthebagandremovesuchfromaroundthebaseof
thesubwoofer.
6.Again,carefullytiltthesubwooferonitssideandagainto
turnitontoitsfeet.Notethatthetoppartoftheprotective
materialwillnowcomeoffeasilysoensurethatthesub-
wooferdoesn’tdroporslideawayintheprocess.
Check that the contents are complete:
–Subwoofer:Thefactory-set powerrequirements (referto
labelonrearofsubwoofer)shouldcorrespondforthere-
gionwhere thesubwoofer waspurchased.Referalsoto
“Importantsafetyinstructions”onpage1.
– Front bafe grille.
– AC mains lead.Thesuppliedleadshouldbesuitablefor
theregionwherethesubwooferwaspurchased.
– This owner’s manual.
Grille
Thesubwoofercanbeoperatedwithoutthegrille.However,it
is recommended that the grille is mounted during normal use
to help prevent accidental damage or dirt settling on the cone
oftheloudspeaker.Withsubwoofers,theinuenceofthegrille
onthesoundisvirtuallynegligible.
To remove the grille:
–Gentlypullthegrilleatallcorners.
To t the grille:
–Lineupthestudswiththecorrespondingfrontbafeholes.
Gentlypushthegrilleinatallcorners.
– When mounting the grille, do not to touch the cone of the
loudspeaker itself.
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Before operation
Owner’s manual 5
Controls and connections
Before operation
Dynaudio Acoustics BM9S 5
Controls and connections
➊
POWER ON/OFF
Main power switch (to switch the subwoofer manually on and off).
LED shows operation mode:
• red = subwoofer switched on and in mute mode
• green = subwoofer is activated
➋
AC IN
Mains power input.
➌
Gain
Subwoofer volume level.
➍
SUB Lowpass
Subwoofer lowpass frequency: continuously variable from 50 to 150 Hz.
➎
Phase
Phase setting: phase can be set to 0° or 180°.
➏
Mode
Subwoofer operation mode LFE or Slave.
• LFE: setting for normal use and Master use.
• Slave: setting for second and all following subwoofers.
➐
LFE IN/OUT
• LFE/Slave IN: input for LFE signal.
• Slave OUT: output to next subwoofer if installed.
➑
SAT/SUB IN
Input for full bandwidth signal. This signal will be processed according to the SAT
Highpass setting and provided at the SAT/SUB OUT.
➒
SAT/SUB OUT
Output for satellite system to be connected. This signal is processed according to
the SAT Highpass setting.
➓
SAT Highpass
Allows cutting off low frequencies of the signal provided at the SAT/SUB OUT.
• Flat: signal is not processed
• 60: cut-off frequency at 60 Hz
• 80: cut-off frequency at 80 Hz
Terminal pinout
➐, ➑, ➒
1 = 0
2 = +
3 = –
➊
➋
➌
➍
➎
➏
➐
➑
➒
➓
➑
➒
(1) POWER ON/OFF
Usethemainpowerswitchtomanuallyswitchthesubwoofer
on and off.
TheLEDshowsthecurrentoperationmode:
–red=subwooferswitchedonandinmutemode
–green=subwooferisactivated
(2) AC IN
Mains power input.
(3) Gain
Subwoofervolumelevel.
(4) SUB Lowpass
Subwooferlowpassfrequency:continuouslyvariablefrom50
to150Hz.
(5) Phase
Phasesetting:phasecanbesetto0°or180°.
(6) Mode
SubwooferoperationmodeLFEorSlave.
– LFE: setting for normal use and Master use.
– Slave:settingforsecondandallfollowingsubwoofers.
(7) LFE IN/OUT
– LFE/Slave IN: input for LFE signal.
– Slave OUT:outputtonextsubwooferifinstalled.
(8) SAT/SUB IN
Inputforfullbandwidth signal.Thissignal willbeprocessed
according to the SAT Highpass setting and provided at the
SAT/SUBOUT.
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Before operation
6 BM9SII
(9) SAT/SUB OUT
Outputforsatellitesystemtobeconnected.Thissignalispro-
cessedaccordingtotheSATHighpasssetting.
(10) SAT Highpass
Allowscuttingofflowfrequenciesofthesignalprovidedatthe
SAT/SUBOUT.
– Flat: signal is not processed
– 60:cut-offfrequencyat60Hz
– 80:cut-offfrequencyat80Hz
Terminal pinout (7), (8), (9)
1=0
2=+
3=–
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Before operation
Owner’s manual 7
Connecting the subwoofer
CAUTION
DAMAGE OF DEVICE DUE TO IMPROPER CON-
NECTION!
–SetthemainspowerswitchtoOFFbeforeconnectingthe
BM9SII.
–Onlyswitchthesubwooferon(mainspowerswitchtoON)
afterallconnectionsandsetupstepshavebeenproperly
completed.
Subwoofer inputs
Before operation
6 Dynaudio Acoustics BM9S
Connecting the subwoofer
Subwoofer inputs
The BM9S provides two different signal inputs:
LFE/Slave IN
This input allows the LFE (Low Frequency Effect) channel to be connected.
The signal is:
• reproduced by the subwoofer
• routed to the Slave OUT for a second subwoofer to be connected.
The SUB Lowpass control has no impact on this input.
SAT/SUB IN
This input allows the connection of a full bandwidth signal.
The signal is:
• reproduced by the subwoofer,
• routed to the SAT/SUB OUT terminals. Low frequencies are cut-off according to
the SAT Highpass setting,
• routed to the Slave OUT for a second subwoofer to be connected. High
frequencies are cut-off according to the SUB Lowpass setting.
CAUTION
DAMAGE OF DEVICE DUE TO IMPROPER CONNECTION!
X Set the mains power switch to OFF before connecting the BM9S.
X Only switch the subwoofer on (mains power switch to ON) after all connections
and set up steps have been properly completed.
+
+
LFE
Slave
SAT/SUB IN
SAT/SUB OUTSlave OUT
LFE/Slave IN
Subwoofer
+
SUB
Lowpass
SAT
Highpass
Gain
Phase
Mode
TheBM9SIIprovidestwodifferentsignalinputs:
LFE/Slave IN
ThisinputallowstheLFE(LowFrequencyEffect)channelto
beconnected.Thesignalis:
–reproducedbythesubwoofer
–routed to the Slave OUT for a second subwoofer to be
connected.
TheSUBLowpasscontrolhasnoimpactonthisinput.
SAT/SUB IN
This input allows the connection of a full bandwidth signal.
Thesignalis:
–reproducedbythesubwoofer,
–routed to the SAT/SUBOUT terminals. Low frequencies
arecut-offaccordingtotheSATHighpasssetting,
–routed to the Slave OUT for a second subwoofer to be
connected. High frequencies are cut-off according to the
SUBLowpasssetting.
Dynaudio Professional BM9SII manual.indd 7 2014-02-24 14:45
Before operation
8 BM9SII
Connecting a single subwoofer
Before operation
Dynaudio Acoustics BM9S 7
Connecting a single subwoofer
➊ Connecting as LFE channel
X Connect subwoofer to LFE/Slave input.
➋ Connecting as subwoofer for satellites
X Connect full bandwidth signal to SAT/SUB input. Sub reproduces sum of right and
left signal.
X Set the Mode switch to LFE.
Multiple subwoofer connections
The BM9S can be used stand-alone or together with multiple subwoofer units. Using
multiple units may be helpful if the listening room is quite large or has difficult
acoustic conditions.
When using two or more subwoofers, the first one (designated “Master”) controls the
following subs (designated “Slave”) via a subwoofer cable.
Connecting multiple subwoofers
1. Connect the first subwoofer as described before.
2. Set Mode switch of first subwoofer to LFE.
3. From the Slave OUT of the first subwoofer connect a XLR cable to the LFE/Slave
IN of the following subwoofer. This one now becomes the slave.
4. Set the Mode switch of the second subwoofer to Slave.
X Further subwoofers can be connected in the same way. Set the Mode switch of all
following subwoofers to Slave respectively.
Note:
•
You can also use both connection types. The signals will be combined in the BM9S
and routed accordingly. This allows the BM9S to reproduce both the LFE channel
information as well as the bass range of the connected satellite system.
•
Use
Slave
mode if you want to use an external bass management system.
Note:
• When using multiple subwoofers in a Master-Slave setup, it is recommended that
the subwoofers are all the same model.
• If you wish to use multiple subwoofers with full individual control, set the Input
switch for all to the “Master” position. From the source subwoofer output,
use a Y-connector.
➊
➋
LFE
Stereo
Sub 1
(Master)
Sub 2
(Slave)
Sub...
(Slave)
LFE
Stereo
(1) Connecting as LFE channel
ConnectsubwoofertoLFE/Slaveinput.
(2)Connectingassubwooferforsatellites
–ConnectfullbandwidthsignaltoSAT/SUBinput.Subre-
produces sum of right and left signal.
–SettheModeswitchtoLFE.
Notes:
–Youcanalsousebothconnectiontypes.Thesignalswill
becombinedintheBM9SIIandroutedaccordingly.This
allowstheBM9SIItoreproduceboththeLFEchannelin-
formationaswellasthebassrangeoftheconnectedsat-
ellitesystem.
–UseSlavemodeifyouwanttouseanexternalbassman-
agementsystem.
Multiple subwoofer connections
Before operation
Dynaudio Acoustics BM9S 7
Connecting a single subwoofer
➊ Connecting as LFE channel
X Connect subwoofer to LFE/Slave input.
➋ Connecting as subwoofer for satellites
X Connect full bandwidth signal to SAT/SUB input. Sub reproduces sum of right and
left signal.
X Set the Mode switch to LFE.
Multiple subwoofer connections
The BM9S can be used stand-alone or together with multiple subwoofer units. Using
multiple units may be helpful if the listening room is quite large or has difficult
acoustic conditions.
When using two or more subwoofers, the first one (designated “Master”) controls the
following subs (designated “Slave”) via a subwoofer cable.
Connecting multiple subwoofers
1. Connect the first subwoofer as described before.
2. Set Mode switch of first subwoofer to LFE.
3. From the Slave OUT of the first subwoofer connect a XLR cable to the LFE/Slave
IN of the following subwoofer. This one now becomes the slave.
4. Set the Mode switch of the second subwoofer to Slave.
X Further subwoofers can be connected in the same way. Set the Mode switch of all
following subwoofers to Slave respectively.
Note:
•
You can also use both connection types. The signals will be combined in the BM9S
and routed accordingly. This allows the BM9S to reproduce both the LFE channel
information as well as the bass range of the connected satellite system.
•
Use
Slave
mode if you want to use an external bass management system.
Note:
• When using multiple subwoofers in a Master-Slave setup, it is recommended that
the subwoofers are all the same model.
• If you wish to use multiple subwoofers with full individual control, set the Input
switch for all to the “Master” position. From the source subwoofer output,
use a Y-connector.
➊
➋
LFE
Stereo
Sub 1
(Master)
Sub 2
(Slave)
Sub...
(Slave)
LFE
Stereo
TheBM9SIIcanbeusedstand-aloneortogetherwithmulti-
plesubwooferunits.Usingmultipleunitsmaybehelpfulifthe
listeningroomisquitelargeorhasdifcultacousticconditions.
Whenusingtwoormoresubwoofers,therstone(designated
“Master”)controlsthefollowingsubs(designated“Slave”)via
asubwoofercable.
Connecting multiple subwoofers
1.Connecttherstsubwooferasdescribedbefore.
2.SetModeswitchofrstsubwoofertoLFE.
3.FromtheSlaveOUToftherstsubwooferconnectaXLR
cabletotheLFE/SlaveINofthefollowingsubwoofer.This
onenowbecomestheslave.
4.SettheModeswitchofthesecondsubwoofertoSlave.
Further subwoofers can be connected in the same way.
SettheModeswitchofallfollowingsubwooferstoSlave
respectively.
Dynaudio Professional BM9SII manual.indd 8 2014-02-24 14:45
Before operation
Owner’s manual 9
Notes:
–WhenusingmultiplesubwoofersinaMaster-Slavesetup,
itis recommendedthat thesubwoofers areall thesame
model.
–Ifyouwishtousemultiplesubwooferswithfullindividual
control, set the Input switch for all to the “Master” position.
Fromthesourcesubwooferoutput,useaY-connector.
Connecting loudspeakers
Operation
8 Dynaudio Acoustics BM9S
Connecting loudspeakers
If your source provides bass management, you can use the BM9S LFE input alone in
LFE or SLAVE mode, depending on the management system capabilities. Avoid
double processing if possible.
Connecting speakers
1. Connect the subwoofer as explained in “Connecting a single subwoofer” on
page 7.
2. From the Subwoofer SAT/SUB OUT connect a XLR cable to the inputs of the
power amplifier you use for your speakers.
Operation Switching the subwoofer on/off (POWER ON/OFF)
Once you have ensured yourself that all necessary connections have been made, the
subwoofer and the connected components can be switched on.
X Switch the subwoofer ON with the main POWER switch on the rear panel.
The status LED on the rear of the subwoofer will light up red.
Automatic mode
After switching on the BM9S is in automatic mode:
• When a music signal is detected, the internal amplifier is activated automatically.
The status LED on the back of the subwoofer will light up green.
As long as a music signal is available on the subwoofer’s input, it will remain
switched on.
• After 15 to 20 minutes of not sensing any input music signal, the subwoofer will
switch itself to Standby mode automatically.
The status LED on the back of the subwoofer will light up red
Note:
• The signals connected to the inputs are provided at the Slave OUT for connecting
another subwoofer. See page 7 to learn more about connecting multiple
subwoofers.
LFE
Stereo
To power amplifier
or active speakers
Note:
X To switch the subwoofer completely off, set the main POWER switch to the OFF
position.
Ifyoursourceprovidesbass management,youcanusethe
BM9SIILFEinputaloneinLFEorSLAVEmode,depending
on the management system capabilities. Avoid double pro-
cessingifpossible.
Connecting speakers
1.Connectthesubwooferasexplainedin“Connectingasin-
glesubwoofer”onpage7.
2.FromtheSubwooferSAT/SUBOUTconnectaXLRcable
totheinputsofthepoweramplieryouuseforyourspeak-
ers.
Note:
– The signals connected to the inputs are provided at the
SlaveOUTforconnectinganothersubwoofer.See“Multi-
plesubwooferconnections”onpage8.
Dynaudio Professional BM9SII manual.indd 9 2014-02-24 14:45
Operation
10 BM9SII
Operation
Switching the subwoofer on/off (POWER ON/OFF)
Operation
8 Dynaudio Acoustics BM9S
Connecting loudspeakers
If your source provides bass management, you can use the BM9S LFE input alone in
LFE or SLAVE mode, depending on the management system capabilities. Avoid
double processing if possible.
Connecting speakers
1. Connect the subwoofer as explained in “Connecting a single subwoofer” on
page 7.
2. From the Subwoofer SAT/SUB OUT connect a XLR cable to the inputs of the
power amplifier you use for your speakers.
Operation Switching the subwoofer on/off (POWER ON/OFF)
Once you have ensured yourself that all necessary connections have been made, the
subwoofer and the connected components can be switched on.
X Switch the subwoofer ON with the main POWER switch on the rear panel.
The status LED on the rear of the subwoofer will light up red.
Automatic mode
After switching on the BM9S is in automatic mode:
• When a music signal is detected, the internal amplifier is activated automatically.
The status LED on the back of the subwoofer will light up green.
As long as a music signal is available on the subwoofer’s input, it will remain
switched on.
• After 15 to 20 minutes of not sensing any input music signal, the subwoofer will
switch itself to Standby mode automatically.
The status LED on the back of the subwoofer will light up red
Note:
• The signals connected to the inputs are provided at the Slave OUT for connecting
another subwoofer. See page 7 to learn more about connecting multiple
subwoofers.
LFE
Stereo
To power amplifier
or active speakers
Note:
X To switch the subwoofer completely off, set the main POWER switch to the OFF
position.
Onceyouhave ensuredyourselfthat allnecessaryconnec-
tions have been made, the subwoofer and the connected
componentscanbeswitchedon.
–SwitchthesubwooferONwiththemainPOWERswitchon
therearpanel.ThestatusLEDontherearofthesubwoof-
er will light up red.
Automatic mode
AfterswitchingontheBM9SIIisinautomaticmode:
–Whenamusicsignalisdetected,theinternalamplieris
activatedautomatically.
ThestatusLEDonthebackofthesubwooferwilllightup
green.
Aslongasamusicsignalisavailableonthesubwoofer’s
input, it will remain switched on.
–After15to20minutesofnotsensinganyinputmusicsig-
nal,thesubwooferwillswitchitselftoStandbymodeauto-
matically.
ThestatusLEDonthebackofthesubwooferwilllightup
red.
Note:
–To switch the subwoofer completely off, set the main
POWER switch to the OFF position.
Adjusting the volume (Gain)
Operation
Dynaudio Acoustics BM9S 9
Adjusting the volume (Gain)
The correct volume setting is an important aspect in achieving a well balanced
speaker combination.
X Adjust the Gain control, until correct setting is reached.
Selecting the subwoofer cut-off frequency
(SUB Lowpass)
The SUB Lowpass control allows the frequency range of the subwoofer to be
defined. Above the selected frequency the sound level decreases rapidly. The correct
setting of this cut-off frequency is important for a well balanced combination of
subwoofer and speakers.
Selecting the cut-off frequency
X Set the SUB Lowpass control to the desired frequency between 50 and 150 Hz.
Please also heed the instructions given in the operating manual of your loudspeakers.
CAUTION
HIGH SOUND LEVELS!
X To avoid auditory defects do not listen to high sound levels
over a longer period of time.
Note:
• You cannot adjust the volume, when subwoofer is in slave mode. In this case the
volume is controlled by the setting of the master subwoofer.
Note:
• The SUB Lowpass only works on SAT/SUB input.
• Perhaps subwoofer cut-off frequency is already set in the bass management of
your source. Please refer to the operating manual of your source. In general use
only one bass management system.
CAUTION
HIGH SOUND LEVELS!
To avoid auditory defects do not listen to high sound levels
over a longer period of time.
The correct volume setting is an important aspect in achieving
awellbalancedspeakercombination.
–AdjusttheGaincontroluntilthecorrectsettingisreached.
Note:
–You cannot adjust the volume when the subwoofer is in
slavemode.Inthiscase,thevolumeiscontrolledbythe
settingofthemastersubwoofer.
Dynaudio Professional BM9SII manual.indd 10 2014-02-24 14:45
Operation
Owner’s manual 11
Selecting the subwoofer cut-off
frequency (SUB Lowpass)
Operation
Dynaudio Acoustics BM9S 9
Adjusting the volume (Gain)
The correct volume setting is an important aspect in achieving a well balanced
speaker combination.
X Adjust the Gain control, until correct setting is reached.
Selecting the subwoofer cut-off frequency
(SUB Lowpass)
The SUB Lowpass control allows the frequency range of the subwoofer to be
defined. Above the selected frequency the sound level decreases rapidly. The correct
setting of this cut-off frequency is important for a well balanced combination of
subwoofer and speakers.
Selecting the cut-off frequency
X Set the SUB Lowpass control to the desired frequency between 50 and 150 Hz.
Please also heed the instructions given in the operating manual of your loudspeakers.
CAUTION
HIGH SOUND LEVELS!
X To avoid auditory defects do not listen to high sound levels
over a longer period of time.
Note:
• You cannot adjust the volume, when subwoofer is in slave mode. In this case the
volume is controlled by the setting of the master subwoofer.
Note:
• The SUB Lowpass only works on SAT/SUB input.
• Perhaps subwoofer cut-off frequency is already set in the bass management of
your source. Please refer to the operating manual of your source. In general use
only one bass management system.
TheSUBLowpasscontrolallowsthefrequencyrangeofthe
subwoofer to be dened.Above the selected frequency the
soundleveldecreasesrapidly.Thecorrectsettingofthiscut-
offfrequencyisimportantforawellbalancedcombinationof
subwooferandspeakers.
Selectingthecut-offfrequency
Set the SUB Lowpass control to the desired frequency be-
tween50and150Hz.
Note:
– TheSUBLowpassonlyworksonSAT/SUBinput.
– Perhapssubwoofercut-offfrequencyisalreadysetinthe
bassmanagementof yoursource.Pleasereferto theoper-
ating manual of your source. In general use only one bass
managementsystem.
Please also heed the instructions given in the operating man-
ualofyourloudspeakers.
Setting the phase (Phase)
Combined frequency response
Subwoofer
Main speakers
Level
Frequency
Withthephasesettingsyoucanadjustthephaserelationship
betweenthesubwooferandmainspeakers.Ifeithersubwoof-
erormainspeakerareslightlyoutofphaseinrelationtothe
other,itcanresultindecreasedbassoutputinthefrequency
responseareawheretheyoverlapeachother.
The phase relationship between subwoofer and satellite
speakersisverydependentonrelativedistance,construction
and working principles of the main speakers. The gure on
theleft showsa casewherebyphase ofthe subwooferand
main speakers are incorrect in the critical overlap area, thus
signicantlyreducingacousticoutputinthelisteningroomin
that area.
Finding the correct phase setting:
1Playabass-richtrackwhichalsocoverstheoverlaparea.
2.TogglethePhaseswitchbetween0°and180°.
Choosethesettingforwhichyouexperiencethemostbass.
Dynaudio Professional BM9SII manual.indd 11 2014-02-24 14:45
Operation
12 BM9SII
Note:
–Youcannotsetthephaseifthesubwooferisinslavemode.
Inthis casethe phaseis controlledby the settingof the
mastersubwoofer.
Setting the satellite cut-off frequency (SAT Highpass)
Dependingonthebasscapabilitiesofthespeakers,thefre-
quency range of subwoofer and speakers can overlap be-
tween50Hzand150Hz.Abumporagapinthefrequency
responseandthusalowersoundqualitywillbeexperiencedif
thesystemisnotmatchedproperly.Inaddition,smallspeak-
ersandlowpoweredamplierswillparticularlybeaffectedby
thelowfrequencysignals,whichagainhasanegativeeffect
on the sound quality. Therefore it makes sense to limit the
bass range of the connected speakers (called “satellites” in
thiscase)byahighpasslter.
TheBM9SIIprovidesthreesettingstoachievethis:
– Flat = no limitation
– 60 Hz=frequenciesbelow60Hzarecutoff.
– 80 Hz=frequenciesbelow80Hzarecutoff.
Setting the cut-off frequency
–SwitchSATHighpasscontroltoneededposition.
Dynaudio Professional BM9SII manual.indd 12 2014-02-24 14:45
Troubleshooting
Owner’s manual 13
Troubleshooting
There may be various reasons why the subwoofer doesn’t
function properly in a system without it being faulty. The
checklistbelowwillhelpsolveproblemsyoumayencounter.
Beforeconsulting your Dynaudio Professional dealer,check
thislistrst.
Checkthisrst:
–Checkifallsignalcablesareconnectedproperly.
–Checksettingsinbassmanagementmenuoftheconnect-
ed source.
–Carefully and gradually increase the subwoofer volume
level on the source.
–Carefully and gradually increase the subwoofer volume
levelonthesubwooferGaincontrol.
Problem Cause Solution
The subwoofer switches itself off
whilemusicisbeingplayed.
Thereishardlyanylow-frequencysignalavailableinthesig-
nal. This can happen if the music or movie itself does not con-
tainverylowfrequencies(e.g.longdialogues).
–Thesubwooferwillswitchonautomaticallyassoonas
low frequent music signals are detected.
–Switchsubwooferoffandonagainbymeansofthemain
POWER switch.
The subwoofer will not switch on
at all.
–ACmainscablehasbecomedisconnected(LEDdoes
not lit)
–MainsswitchonthebackisswitchedtoOFF(LEDdoes
not lit)
Makesuretoswitchthesystemoffrstbeforemaking
anychanges!
–Reconnectmainscable.
–Switchmainsbackon.
–Checkifallsignalcablesareconnectedproperly.
The subwoofer will not switch on
automatically.
–Nosignalispresentoneitherofthesubwoofer’sinputs
(LED lights red).
Makesuretoswitchthesystemoffrstbeforemaking
anychanges!
–Checkifallsignalcablesareconnectedproperly.
–Checkifthesubwooferoutputonthesourceisengaged.
Subwoofer is switched on but no
soundfromthesubwoofer.
–Nosignalispresentoneitherofthesubwoofer’sinputs.
–Inthesource’sbass-managementset-up,subwoofer
hasbeendisabled.
–Subwoofervolumelevelhasbeenturneddownallthe
wayonthesource.
–Subwoofervolumelevelhasbeenturneddownallthe
waywiththesubwoofer’scontrol.
Makesuretoswitchthesystemoffrstbeforemaking
anychanges!
–Checkifallsignalcablesareconnectedproperly.
–Checksettingsinbassmanagementmenuofthe
source.
–Carefullyandgraduallyincreasethesubwoofervolume
level on the source.
–Carefullyandgraduallyincreasethesubwoofervolume
levelonthesubwooferGaincontrol.
Dynaudio Professional BM9SII manual.indd 13 2014-02-24 14:45
Maintenance
14 BM9SII
Maintenance
Changing the fuse
WARNING
RISK OF FIRE!
The fuse is placed on the rear of the subwoofer below the
mainspower input.It canbe changed withoutremoving the
ampliermodule.
Technical Information/Warranty
12 Dynaudio Acoustics BM9S
Technical Information/Warranty Changing the fuse
The fuse is placed on the rear of the subwoofer below the mains power input. It can
be changed without removing the amplifier module.
Changing the fuse
1. Switch off the mains power switch and unplug the power cable.
2. Pull out the fuse holder
3. Replace fuse with same type and rating
4. Push fuse holder back firmly until it is locked into position.
WARNING
RISK OF FIRE!
X For continued protection against risk of fire, replace only with same type fuse and
rating.
Changing the fuse
1.Switchoffthemainspowerswitchandunplugthepower
cable.
2. Pull out the fuse holder
3.Replacefusewithsametypeandrating
4.Pushfuseholderbackrmlyuntilitislockedintoposition.
Forcontinuedprotectionagainstriskofre,replaceonlywith
sametypefuseandrating.
Dynaudio Professional BM9SII manual.indd 14 2014-02-24 14:45
Warranty
Owner’s manual 15
Warranty
DynaudioProfessionalproductsarewarrantedtobefreefrom
defectsin components and factory workmanshipunder nor-
maluseandserviceforaperiodoftwo(2)yearswhenbought
from a reseller within the EU.
DynaudioProfessionalproductsarewarrantedtobefreefrom
defectsin components and factory workmanshipunder nor-
maluseandserviceforaperiodofone(1)yearwhenbought
from a reseller outside the EU.
Whenfailingtoperformasspeciedduringthewarrantype-
riod we will undertake to repair, or at our option, replace this
product at no charge to its owner, provided the unit is returned
undamaged and shipping prepaid, to an authorized service
facilityortothefactory.
Dynaudioshallnotberesponsibleforanyincidentalorcon-
sequential damages. Dynaudio’s responsibility is limited to
theproductitself.Dynaudioassumesnoresponsibilityforany
lossduetocancellationofanyevents,orrentofreplacement
equipmentorcostsduetothirdparty’sorcustomer’slossof
prot,oranyotherindirectcostorlosseshoweverincurred.
Dynaudio reserves the right to make changes or improve-
mentsindesignormanufacturingwithoutassuminganyob-
ligation to change or improve products previously manufac-
turedand/orsold.
The product warranty is only valid in the country where the
product was purchased.
Exceptions
Dynaudiowillalwaysfollowthelawoftherespectivemarkets
shoulditdifferfromthepolicystatedaboveortheexceptions
statedbelow.
Thiswarrantyshallbenullandvoid,iftheproductissubject-
ed to repair work or alteration by a person or facility other
thanthose authorizedby Dynaudio;mechanical damagein-
cluding shipping accidents; war, civil insurrection, misuse,
abuse,operationwithincorrectACvoltage,incorrectconnec-
tions, wrong accessories, incorrect use of accessories, oper-
ationwithfaultyassociatedequipment,exposuretoinclement
weather conditions and normal wear and tear.
Units,onwhichtheserialnumberhasbeenremovedorde-
faced,arenoteligibleforwarrantyservice.
Dynaudio Professional BM9SII manual.indd 15 2014-02-24 14:45
TechnicalSpecications
16 BM9SII
Technical Specications
System Activesubwoofer
Bass principle Closed
Frequencyresponse 29to250Hz(±3dB)
Input–LFE/Slave XLR
Input–vSAT/SUB right/leftfullbandwidth,XLR
Inputimpedance+branch 20 kOhm 10 kOhm
Inputimpedance-branch 75mVRMSto5VRMS,adjustable10VRMS
Sensitivity XLR
Max. input voltage right/left,Highpassltered,XLR
Output–Slave 100Ohm(eachbranch)1:0/2:+/3:-
Output–SAT/SUB LFE,Slave(Phaseandvolumecontrolsarebypassedinslavemode)
OutputimpedanceXLRPinout 0°,180°
Mode selector Flat,60Hz,80Hz
PhaseadjustmentSATHighpassSUBLowpass 50to150Hz
AutoON/OFF–AutomaticON(LEDgreen) When signal is detected at input
AutoON/OFF–Automaticmute(LEDred) When no signal is detected for 15 to 20 minutes
Amplierpower 200 W, 4 Ohm
Powerconsumption–Standby < 0.5 W
Power consumption – max. 325 W
Woofer – Cone 240mm/10”,onepiecemoldedMSP(MagnesiumSilicatePolymer)cone
Woofer – Coil 100mm/4”,purealuminumvoicecoil
Dimensions (Depth x Width x Height) 337 x 290 x 290 mm (incl. cloth cover)
Cabinetvolume 15,9 liters
Weight 8.8 kg
Mains–100-120V,50/60Hz FuseT3.15A
Mains–220-240V,50/60Hz FuseT1.6A
Duetocontinuousdevelopment,thesespecicationsaresubjecttochangewithoutnotice.
Dynaudio Professional BM9SII manual.indd 16 2014-02-24 14:45
Notes
Owner’s manual 17
Notes
Dynaudio Professional BM9SII manual.indd 17 2014-02-24 14:45
© Dynaudio A/S, 8660 Skanderborg, Denmark
Owner’sManualBM9SII0214–itemno.455402
Alltextandimagecopyrightsreserved.Subjecttochangewithoutnotice.
www.dynaudioprofessional.com
Dynaudio Professional BM9SII manual.indd 18 2014-02-24 14:45
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Dynaudio BM9S II Owner's manual

Dynaudio
Brand
Dynaudio
Model
BM9S II
Category
Subwoofers
Type
Owner's manual

Dynaudio BM9S II is a high-end subwoofer designed for professional audio applications, offering a powerful and accurate low-frequency response. With its 9-inch woofer and built-in amplifier, it delivers deep, clear bass that can be tailored to your specific needs. The BM9S II features a variety of adjustable settings, including a continuously variable low-pass filter, phase control, and two operation modes (LFE and Slave), making it easy to integrate into any audio system.

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