Mordaunt Short MS907W User manual

MS907W Subwoofer
Owners' Manual

Introduction..........................................................
Safety Precautions..............................................
Subwoofer Controls............................................
Attaching Feet to Your Subwoofer.....................
Running In............................................................
Connecting Your Subwoofer..............................
Positioning Your Subwoofer..............................
Taking Care of Your Subwoofer.........................
Technical Specifications.....................................
Warranty Information..........................................
2
3
6
8
8
8
9
9
10
11
.
Congratulations on purchasing this Mordaunt-
Short subwoofer. To ensure optimum
performance please read and retain this manual,
thensitback,relaxandenjoy!
Pleasereadandretainthismanual,itcontainsuseful
informationthatwillensureyougettheverybestfrom
yournewloudspeakers.
Note:
This model is supplied in two mains voltage ratings.
Pleaserefertoproductrearpanelforrating.
Contents
Introduction
2

Forsafetyreasonsplease readthe followinginstructions andthe enclosed
Important Safety Information carefully before attempting to connect your
subwooferunittothemains.
Use of controls or adjustments or performance of procedures other than
thosespecifiedmayresultinhazardousradiationexposure.
The lightning flash with the arrowhead symbol within an
equilateral triangle is intended to alert the user to the presence
of uninsulated ‘dangerous voltage’ within the product’s
enclosurethat may be of sufficient magnitude toconstitute a
riskofelectricshocktopersons.
The exclamation point within an equilateral triangle is intend
edtoalerttheusertothepresence of important operatingand
maintenance (servicing) instructions in the literature
accompanyingtheappliance.
This product complies with European Low Voltage
(73/23/EEC) and Electromagnetic Compatibility
(89/336/EEC) Directives when used according to this
instructionmanual.
Warning
To reduce the risk of fire or electric shock, do not expose this appliance to
rainormoisture.
Caution
Caution
To reduce the risk of electric shock, do not remove cover (or back). There
are no user-serviceable parts inside. Please refer all servicing to a
qualifiedengineer.
PlugFittingInstructions(UKonly)
Thecord suppliedwith this applianceis factoryfitted witha 13A mainsplug
fitted with a 3A fuse inside. If it is necessary to change the fuse, it is
importantthata 3A oneisused. Ifthe plug needstobechanged because it
is not suitable for your socket, or becomes damaged, it should be cut off
and an appropriate plug fitted following the wiring instructions below. The
plugmust thenbe disposed ofsafely, asinsertion into a13A socketis likely
to cause an electrical hazard. Should it be necessary to fit a 3-pin BS
mains plug to the power cord the wires should be fitted as shown in this
diagram. The colours of the wires in the mains lead of this appliance may
notcorrespond withthe coloured markingsidentifying theterminals in your
plug. Connectthemasfollows:-
• The wire which is coloured BLUE must be
connected to the terminal which is marked
withthe letter‘N’orcolouredBLACK.
• Thewire which iscoloured BROWNmustbe
connected to the terminal which is marked
withtheletter‘L’orcolouredRED
• The wire which is coloured
GREEN/YELLOWmust be connected to the
terminalwhich ismarked withthe letter‘E’ or
colouredGREEN.
Note
If a 13 Amp (BS 1363) type of plug is used a 3 Amp or 5 Amp fuse must be
fitted,eitherintheplugoradaptor,oronthedistributionboard.
E
GREEN /
YELLOW
BLUE FUSE
BROWN
CORD
GRIP
NL
Important Safety Precautions
3
The 110V version of the MS907W complies to the
requirement ANSI/UL STD.1492, is certified to CAN/CSA
STD.C22.2NO.1 andis approvedby ETLfor salein the USA
andCanada

Read Instructions - All the safety and operating instructions should
bereadbeforetheproductisoperated
RetainInstructions -Thesafety andoperatinginstructionsshouldbe
retainedforfuturereference.
Heed Warnings - All warnings on the product and the operating
instructionsshouldbeadheredto.
Follow instructions - All operating and use instructions should be
followed.
Cleaning - Unplug this product from the wall outlet before cleaning.
Do not use liquid cleaners or aerosol cleaners. Use a damp cloth for
cleaning.
Attachments - Do not use attachments not recommended by the
productmanufacturerastheymaycausehazards.
Water and Moisture - Do not use this product near water - for
example, near a bath tub, wash bowl or kitchen sink; in a wet
basement,ornearaswimmingpooletc.
Wall or Ceiling Mounting - The product should be mounted to a wall
orceilingonlyasrecommendedbythemanufacturer
Accessories - Do not place this product on an unstable surface,
stand,bracket ortable. The productmay fall,causing seriousinjury to
childor adult,and serious damageto theproduct. Use onlyasurface,
standbracket ortable recommendedby themanufacturer, orsoldwith
the product. Any mounting of the product should follow the
manufacturer's instructions, and should use a mounting accessory
recommendedbythemanufacturer.
A product and stand combination should be moved with care. Quick
stops, excessive force, and uneven surfaces may cause the
combinationtooverturn.
Ventilation - Slots and openings in the cabinet are provided for
ventilation and to ensure reliable operation of the product and to
protectitfromoverheating,andtheseopeningsmustnotbeblockedor
covered. The openings should never be blocked by placing the
product on a bed, sofa, rug, or other similar surface. This product
should not be placed in a built-in installation such as a bookcase or
rack unless proper ventilation is provided or the manufacturer's
instructionshavebeenadheredto.
Power Sources - This product should be operated only from the type
of power source indicated on the marking label. If you are not sure of
the type of power supply to your home, consult your product dealer or
local power company. For products intended to operate from battery
power,orothersources,refertotheoperatinginstructions.
Grounding or Polarization - In some countries this product may be
eqiupped with a polarized alternating-current line plug (a plug having
one pin wider than the other). This plug will fit into the power outlet
only one way. This is a safety feature. If you are unable to insert the
plug into the outlet, try reversing the plug. If the plug still does not fit,
Important Safety Precautions
4

contact your electrician to replace your obsolete outlet. Do not defeat
thesafetypurpose ofthegrounding-typeplug.
Power-Cord Protection - Power supply cords should be routed so
thattheyarenotlikelytobewalkedonorpinchedbyitemsplacedupon
or against them, paying particular attention to cords at plugs,
conveniencereceptacles,andpointwheretheyexitfromtheproduct.
Protective Attachment Plug - The product is equipped with an
attachment plug having overload protection. This is a safety feature.
SeeOwners' Manualfor replacementor resettingof protectivedevice.
If replacement of the plug is required, be sure the service technician
has used a replacement plug specified by the manufacturer that has
thesameoverloadprotectionastheoriginalplug.
Lightning - For added protection for this product during a lightning
storm,orwhenitisleftunattendedandunusedforlong periodsoftime,
unplug it from the wall outlet and disconnect the antenna or cable
system. This will prevent damage to the product due to lightning and
power-linesurges.
Overloading - Do not overload wall outlets, extension cords, or
integral convenience receptacles as this can result in a risk of fire or
electricshock.
Object and Liquid Entry - Never push objects of any kind into this
product through openings as they may touch dangerous voltage
points or short-out parts that could result in a fire or electric shock.
Neverspillliquidofanykindontheproduct.
Servicing -Donot attempt to service thisproduct yourself as opening
or removing covers may expose you to dangerous voltage or other
hazards. Referallservicingtoqualifiedservicepersonnel.
conditions:
Damage Requiring Service - Unplug this product from the wall outlet
andreferservicingtoqualifiedservicepersonnelunderthefollowing
conditions:
a) Whenthepower-supplycordorplugisdamaged
b) If liquid has been spilled, or objects have fallen onto the
product
c) Iftheproducthasbeenexposedtorainorwater
d) If the product does not operate normally by following the
operating instructions. Adjust only those controls that are
covered by the operating instructions as an improper
adjustment of other controls may result in damage and will
often require extensive work by a qualified technician to
restoretheproducttoitsnormaloperation
e) Iftheproducthasbeendroppedordamagedinanyway
f) When the product exhibits a distinct change in performance
-thisindicatesaneedforservice
Replacement Parts - When replacement parts are required, be sure
the service technician has used replacement parts specified by the
manufacturer or have the same characteristics as the original part.
Unauthorised substitutions may result in fire, electric shock, or other
hazards.
Safety Checks - Upon completion of any service or repairs to this
product, ask the service technician to perform safety checks to
determinethattheproductisinproperoperatingcondition.
Heat-The productshouldbesituatedaway fromheatsources suchas
radiators, heat registers, stoves, or other products (including
amplifiers)thatproduceheat.
Important Safety Precautions
5

AUTO
+
+
+
+
-
-
-
-
POWER
MIN MAX
50Hz 150Hz
LR
HIGH LEVEL INPUT
(FROM AMPLIFIER)
CAUTION: SERIAL
NUMBER REMOVED
www.mordaunt-short.co.uk
HIGH LEVEL OUTPUT
(TO SATELLITE SPEAKERS)
LEVEL
FREQUENCY
PHASE
LINE
INPUT
LINE
OUTPUT
LR
LR
R
L
STANDBY
180
0
MS907 W SUBWOOFER
CAUTION: FOR CONTINUED PROTECTION
AGAINST RISK OF FIRE REPLACE
ONLYWITH SAME TYPE T1A 250V FUSE
BS4265/IEC127
Max Power Consumption: 250W
RISK OF ELECTRIC SHOCK DO NOT OPEN
RISQUE DE CHOC ELECTRIQUENE PAS OUVRIR
VORM ÖFFNEN DES GERÄTESNETZSTECKER ZIEHEN
Power Rating: 220-240V AC 50Hz
CAUTION:
AVIS:
ACHTUNG:
ON
OFF
OO
ll
ON
1.Level
This control allows you to adjust the volume of low
frequency output from your subwoofer amplifier to obtain
thebestsound-balancewithinyoursurroundings
2.Frequency
This is used to adjust the point at which the crossover will
separate the low frequencies being used by the subwoofer
from the higher frequencies played by the rest of the
system. Raising the Low Frequency Cut-Off will increase
the frequency range that the MS907W will reproduce.
Lowering the Low Frequency Cut-Off will limit the range of
frequenciesreproduced.
3.Phase
This allows you to optimise the phase of your MS907W to
different listening positions and that of other speaker
systemsusedatthesametime.
4.LineInput
Ifyouramplificationsystemhasadedicatedsubwoofer line
outputitshouldbeconnectedhere(seefig.1opposite).
5.LineOutput
Thisconnectioncanbeusedifanadditionalsubwooferisto
beaddedtoyoursystem
Subwoofer Controls
6
1
2
3
4
5
6
7
8
9

Subwoofer Controls
7
To prevent damage to the amplifier, only connect using line level inputs OR high-level inputs:
DO NOT USE BOTH METHODS OF CONNECTION AT THE SAME TIME
6.Auto/On
If switched to auto, the subwoofer will remain in standby
mode until a signal is detected at the input. The unit will
then automatically switch itself on. It will then
automatically return to standby mode if no input signal is
presentforapproximately5minutes. Withtheswitchinthe
'ON' position the unit remains permanently on as long as
the main power switch is on. The LED positioned on the
rear panel indicates whether the unit is on or in standby
mode(red for standbyand green whenon). The blue front
panelLEDindicatestheunitisonandworking.
7. Power
Switchesthesubwoofer(amplifier)poweronoroff
Note: This vacation switch is used to disconnect power from
theproductduringlongperiodsofnon-use.
8.HighLevelInput/HighLevelOutput
If your amplification system does not have a dedicated
subwoofer line output, your subwoofer must be connected
via the high level terminals on the rear panel. Connection
should be made from the speaker terminals on your
amplification system to the High Level Input Connections
(seefig.2below).
9.ACPowerSocket
Use this socket to connect to an appropriate mains socket
viatheACPowerCablesupplied
+
+
+
+
-
-
-
-
50Hz 150Hz
LR
FREQUENCY
PHASE
LINE
INPUT
LINE
OUTPUT
LR
LR
R
L
180
0
FIG. 2
Subwoofer Controls
7
To prevent damage to the amplifier, only connect using line level inputs OR high-level inputs:
DO NOT USE BOTH METHODS OF CONNECTION AT THE SAME TIME
6.Auto/On
If switched to auto, the subwoofer will remain in standby
mode until a signal is detected at the input. The unit will
then automatically switch itself on. It will then
automatically return to standby mode if no input signal is
presentforapproximately5minutes. Withtheswitchinthe
'ON' position the unit remains permanently on as long as
the main power switch is on. The LED positioned on the
rear panel indicates whether the unit is on or in standby
mode(red for standbyand green whenon). The blue front
panelLEDindicatestheunitisonandworking.
7. Power
Switchesthesubwoofer(amplifier)poweronoroff
Note: This vacation switch is used to disconnect power from
theproductduringlongperiodsofnon-use.
8.HighLevelInput/HighLevelOutput
If your amplification system does not have a dedicated
subwoofer line output, your subwoofer must be connected
via the high level terminals on the rear panel. Connection
should be made from the speaker terminals on your
amplification system to the High Level Input Connections
(seefig.2below).
9.ACPowerSocket
Use this socket to connect to an appropriate mains socket
viatheACPowerCablesupplied
+
+
+
+
-
-
-
-
50Hz 150Hz
LR
FREQUENCY
PHASE
LINE
INPUT
LINE
OUTPUT
LR
LR
R
L
180
0
FIG. 2
Subwoofer Controls
7
To prevent damage to the amplifier, only connect using line level inputs OR high-level inputs:
DO NOT USE BOTH METHODS OF CONNECTION AT THE SAME TIME
6.Auto/On
If switched to auto, the subwoofer will remain in standby
mode until a signal is detected at the input. The unit will
then automatically switch itself on. It will then
automatically return to standby mode if no input signal is
presentforapproximately5minutes. Withtheswitchinthe
'ON' position the unit remains permanently on as long as
the main power switch is on. The LED positioned on the
rear panel indicates whether the unit is on or in standby
mode(red for standbyand green whenon). The blue front
panelLEDindicatestheunitisonandworking.
7. Power
Switchesthesubwoofer(amplifier)poweronoroff
Note: This vacation switch is used to disconnect power from
theproductduringlongperiodsofnon-use.
8.HighLevelInput/HighLevelOutput
If your amplification system does not have a dedicated
subwoofer line output, your subwoofer must be connected
via the high level terminals on the rear panel. Connection
should be made from the speaker terminals on your
amplification system to the High Level Input Connections
(seefig.2below).
9.ACPowerSocket
Use this socket to connect to an appropriate mains socket
viatheACPowerCablesupplied
+
+
+
+
-
-
-
-
50Hz 150Hz
LR
FREQUENCY
PHASE
LINE
INPUT
LINE
OUTPUT
LR
LR
R
L
180
0
FIG. 2
+
+
+
+
-
-
-
-
50Hz 150Hz
LR
FREQUENCY
PHASE
LINE
INPUT
LINE
OUTPUT
LR
LR
R
L
180
0
FIG. 1
From
amplifier
dedicated
subwoofer
line output
Subwoofer Controls
7
To prevent damage to the amplifier, only connect using line level inputs OR high-level inputs:
DO NOT USE BOTH METHODS OF CONNECTION AT THE SAME TIME
6.Auto/On
If switched to auto, the subwoofer will remain in standby
mode until a signal is detected at the input. The unit will
then automatically switch itself on. It will then
automatically return to standby mode if no input signal is
presentforapproximately5minutes. Withtheswitchinthe
'ON' position the unit remains permanently on as long as
the main power switch is on. The LED positioned on the
rear panel indicates whether the unit is on or in standby
mode(red for standbyand green whenon). The blue front
panelLEDindicatestheunitisonandworking.
7. Power
Switchesthesubwoofer(amplifier)poweronoroff
Note: This vacation switch is used to disconnect power from
theproductduringlongperiodsofnon-use.
8.HighLevelInput/HighLevelOutput
If your amplification system does not have a dedicated
subwoofer line output, your subwoofer must be connected
via the high level terminals on the rear panel. Connection
should be made from the speaker terminals on your
amplification system to the High Level Input Connections
(seefig.2below).
9.ACPowerSocket
Use this socket to connect to an appropriate mains socket
viatheACPowerCablesupplied
+
+
+
+
-
-
-
-
50Hz 150Hz
LR
FREQUENCY
PHASE
LINE
INPUT
LINE
OUTPUT
LR
LR
R
L
180
0
FIG. 2
+
+
+
+
-
-
-
-
50Hz 150Hz
LR
FREQUENCY
PHASE
LINE
INPUT
LINE
OUTPUT
LR
LR
R
L
180
0
FIG. 1
From
amplifier
dedicated
subwoofer
line output

ConnectingviaLineInput
Ifyouramplificationsystem has adedicatedsubwooferline
output then you should connect your MS907W via the Line
Input on the rear panel using a good quality phono lead.
Note that if your amplification system has a mono
subwoofer line out then use the Left/Mono socket on your
MS907W.
ConnectingviaHighLevelConnections
Do not compromise the performance of your system by
usinginferiorqualitycables! Mordaunt-Shortrecommends
that high quality cables of 16 gauge or higher be used.
Yourprofessionaldealerwillgiveyougoodadvice.
Observing polarity is of the utmost importance while
connecting your loudspeakers. Ensure that the red (+)
terminals on your amplification system are connected to
the red (+) on the subwoofer, and black (-) on your
amplificationsystemtoblack(-)onyoursubwoofer.
Important Note: Always unplug all A.C. powered
components before making any loudspeaker or
component connections. This will avoid the risk of electric
shockordamagetoyourequipment
Getting Started
8
Attachingfeettoyoursubwoofer
Your MS907W subwoofer comes with feet and spikes
which must be fitted to space the down-firing speaker unit
thecorrectdistancefromthefloorforoptimumoperation
Thespikesattachtothebottomofthefeet(asshownbelow
left).
There are eight pilot holes on the bottom of the speakers.
The feet are located and secured here with the wood
screwssupplied(belowright). Levelasrequired.
RunningIn
Your new unit will require a total of approximately 10 hours
of normal use to allow the components to settle into their
workingroutineandreachtheiroptimumperformance.

9
PositioningyourSubwoofer
The positioning of your subwoofer will affect the quantity
and also quality of the lower frequencies of the system.
Locating the subwoofer near a wall will increase the bass
response of the speaker. If it is placed too near to a corner
however, the overall effect may be too 'boomy'. Due to the
low frequency nodal characteristics of the room, the
response will change as it is placed a little closer, or further
away from the listening position. Adjusting the rear panel
controls (as explained in previous sections) will also affect
the sound, so the answer is to experiment and find the
position and settings that provide a good balance between
low frequency amount and definition across a range of
sourcematerial.
TakingCareofyourSubwoofer
Cabinetsshouldbedustedandlightlypolishedasrequired.
Do not use solvent based cleaners, as they may damage
the cabinet surface. Do not expose the cabinets to strong,
direct sunlight, high temperatures, high humidity or allow
themtobecomewet.
Getting Started

MS907W Technical Specifications
23Hz-150Hz
Line in, 100mV (for max output)
Hi Level in, 5V (for max output)
100 Watts
220 - 240 Volts 50 - 60 Hz
or 100 - 120 Volts 50 - 60Hz
USA/Canada only
250 Watts
10” Shielded Long throw woofer
Continuous/Active
370 x 370 x 370 (mm)
14.6 x 14.6 x 14.6 (Lbs)
15.3kg / 33.7 Lbs
Frequency Response
Sensitivity
Output Power
Mains Voltage
Power Consumption
Drivers
Crossover Type
Size (H x W x D) mm
Size (H x W x D) Inches
Weight
Mordaunt-Short's policy is one of conitinuous improvement. Design and specifications are therefore subject to change without prior notice.
10

11
ThisWarrantydoesnotcovercosmeticdamageordamagedue
to acts of God, accident, misuse, abuse, negligence,
commercial use, or modification of, or to any part of, the
product. This Warranty does not cover damage due to
improper operation, maintenance or installation, or attempted
repair by anyone other than Mordaunt-Short or a Mordaunt-
Shortdealer, or authorised serviceagent which is authorisedto
do Mordaunt-Short warranty work. Any unauthorised repairs
will void this Warranty. This Warranty does not cover products
sold ASISorWITHALLFAULTS.
REPAIRS OR REPLACEMENTS AS PROVIDED UNDER
THIS WARRANTY ARETHE EXCLUSIVE REMEDY OF THE
CONSUMER. MORDAUNT-SHORT SHALL NOT BE LIABLE
FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES
FOR BREACH OF ANY EXPRESS OR IMPLIED WARRANTY
INTHIS PRODUCT. EXCEPTTOTHE EXTENTPROHIBITED
BY LAW,THIS WARRANTY IS EXCLUSIVE AND IN LIEU OF
ALL OTHER EXPRESS AND IMPLIED WARRANTIES
WHATSOEVER INCLUDING, BUT NOT LIMITED TO, THE
WARRANTY OF MERCHANTABILITY AND FITNESS FORA
PRACTICALPURPOSE.
Some countries and US states do not allow the exclusion or
limitation of incidental or consequential damages or implied
warranties so the above exclusions may not apply to you. This
Warranty gives you specific legal rights, and you may have
otherstatutoryrights,whichvaryfromstatetostateorcountryto
country.
Mordaunt-Short warrants this product to be free from defects in
materials and workmanship (subject to the terms set forth
below). Mordaunt-Short will repair or replace (at Mordaunt-
Short'soption)thisproductoranydefectivepartsinthisproduct.
Warranty periods may vary from country to country. If in doubt
consult your dealer and ensure that you retain proof of
purchase.
To obtain warranty service, please contact the Mordaunt-Short
authorised dealer from which you purchased this product. If
your dealer is not equipped to perform the repair of your
Mordaunt-Short product, it can be returned by your dealer to
Mordaunt-Short or an authorised Mordaunt-Short service
agent. You will need to ship this product in either its original
packagingorpackagingaffordinganequaldegreeofprotection.
Proofofpurchaseintheformofabillofsaleorreceiptedinvoice,
whichisevidencethatthisproductiswithinthewarrantyperiod,
mustbepresentedtoobtainwarrantyservice.
This Warranty is invalid if (a) the factory-applied serial number
has been altered or removed from this product or (b) this
product was not purchased from a Mordaunt-Short authorised
dealer. You may call Mordaunt-Short, MarantzAmerica Inc. (in
USA only) or your local country Mordaunt-Short distributor to
confirm that you have an unaltered serial number and/or you
purchasedfromaMordaunt-Shortauthoriseddealer.
Warranty Information

www.mordaunt-short.co.uk
Made from recyclable material
Part No. AP12141/3
www.mordaunt-short.co.uk
Made from recyclable material
Part No. AP12141/3