Cambridge SoundWorks Speaker System THX 250D User Manual

MegaWorks THX 250D  
Multimedia Speaker System  
User Guide  
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Safety & Regulatory Information  
The following sections contain notices for various countries:  
Notice for Canada  
Notice for the USA  
Declaration of Conform ity  
FCC Part 15: 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, this notice is not a guarantee  
that interference will not occur in a particular installation. If this  
equipment does cause harmful interference to radio or television  
reception, which can be determined by turning the equipment off  
and on, the user is encouraged to try one or more of the following  
measures:  
This apparatus complies with the Class B limits for radio  
interference as specified in the Canadian Department of  
Communications Radio Interference Regulations.  
According to the FCC96 208 and ET95-19,  
Manufacturer/Importer’s Name: Creative Labs, Inc.  
Manufacturer/Importer’s Address:1901 McCarthy Boulevard  
Milpitas, CA. 95035  
Cet appareil est conforme aux normes de CLASSE “B”  
d’interference radio tel que spe’cifie’ par le Ministère Canadien  
des Communications dans les règlements d’interfèrence radio.  
United States  
Tel: (408) 428-6600  
declares under its sole responsibility that the product  
Trade Name: Creative Labs  
Model Numbers: MMS0650  
Im portant Notice  
The serial number for the MegaWorks THX 250D is located on  
the subwoofer. Please write this number down and keep it in a  
secure area. This is for your security.  
has been tested according to the FCC / CISPR22/85 requirement  
for Class B devices and found compliant with the following  
standards:  
Reorient or relocate the receiving antenna.  
EMI/EMC: ANSI C63.4 1992, FCC Part 15 Subpart B  
Complies with Canadian ICES-003 Class B.  
CAUTION  
Increase the distance between the equipment and receiver.  
Connect the equipment to an outlet on a circuit different from that  
to which the receiver is connected.  
Take care to prevent accidental operation of your new  
loudspeaker system at excessive sound pressure levels!  
In a typical personal computer installation, the MegaWorks THX  
250D satellite speakers are less than a meter from the listener.  
If you do not hear sound from your new speaker, keep the  
MegaWorks THX 250D's volume control at a low level (two  
LED indicators lit on the wired remote) while trying to restore  
sound to your system. This will prevent accidental operation at  
uncomfortably loud levels.  
This device complies with part 15 of the FCC Rules.  
Operation is subject to the following two conditions:  
1. This device may not cause harmful interference, and  
2. This device must accept any interference received, including  
interference that may cause undesirable operation.  
Consult the dealer or an experienced radio/ TV technician.  
CAUTION: To comply with the limits for the Class B digital  
device, pursuant to Part 15 of the FCC Rules, this device must be  
installed with computer equipment certified to comply with the  
Class B limits.  
All cables used to connect the computer and peripherals must be  
shielded and grounded. Operation with non-certified computers  
or non-shielded cables may result in interference to radio or  
television reception.  
Ce matériel est conforme à la section 15 des régles FCC. Son  
Fonctionnement est soumis aux deux conditions suivantes:  
1. Le matériel ne peut étre source D’interférences et  
2. Doit accepter toutes les interférences reques, Y compris celles  
pouvant provoquer un fonctionnement indésirable.  
Compliance Manager  
Com pliance  
Modifications  
This product conforms to the following Council Directive:  
Creative Labs, Inc.  
September 11, 2002  
Any changes or modifications not expressly approved by the  
grantee of this device could void the user’s authority to operate  
the device.  
Directive 89/ 336/ EEC, 92/ 31/ EEC (EMC), 73/ 23/ EEC (LVD)  
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IMPORTANT SAFETY INSTRUCTIONS  
READ INSTRUCTIONS - All safety and  
operating instructions should be read  
before the MegaWorks THX 250D  
amplified subwoofer/satellite system is  
operated.  
manufacturer’s instructions, and should use  
a mounting accessory recommended by  
Cambridge Soundworks and Creative  
Technology.  
the plug fully into the outlet, try reversing  
the plug. If the plug should still fail to fit,  
contact your electrician to replace your  
obsolete outlet. Do not defeat the safety  
purpose of the polarized plug.  
qualified service personnel under the  
following conditions:  
a) When the power-supply cord or plug is  
damaged.  
VENTILATION - Slots and openings in the  
cabinet are provided for ventilation, to  
ensure reliable operation of the subwoofer  
and to prevent it from overheating; and  
these openings must not be blocked or  
covered. The openings should never be  
blocked by placing the product on a bed,  
sofa, rug, or other similar surface. The  
subwoofer should not be placed in a built-in  
installation such as a bookcase or rack  
unless proper ventilation is provided or  
Cambridge Soundworks and Creative  
Technology’sCambridge Soundworks and  
Creative Technology’s instructions have  
been adhered to.  
b) If liquid has been spilled, or object have  
fallen into the subwoofer.  
RETAIN INSTRUCTIONS - The safety and  
operating instructions should be retained  
for future reference.  
POWER-CORD PROTECTION - Power-supply  
cords should be routed so that they are not  
likely to be walked on or pinched by items  
placed upon or against them, paying  
particular attention to cords at plugs,  
convenience receptacles, and the point  
where they exit from the subwoofer.  
c) If the subwoofer has been exposed to rain  
or water.  
HEED WARNINGS - All warnings on the  
subwoofer and in the operating instructions  
should be adhered to.  
d) If the subwoofer does not operate normally  
by following the operating instructions; or  
exhibits a distinct change in performance.  
FOLLOW INSTRUCTIONS - All operating and  
e) If the product has been dropped or  
damaged in any way.  
LIGHTNING - For added protection for the  
MegaWorks THX 250D system during a  
lightning storm, or when it is left unattended  
and unused for long periods of time, unplug  
it from the wall outlet. This will prevent  
damage to the subwoofer due to lightning  
and power-line surges.  
usage instructions should be followed.  
CLEANING - Unplug the subwoofer from the  
wall outlet or other power source before  
cleaning. Do not use liquid cleaners or aerosol  
cleaners. Use a damp cloth for cleaning.  
REPLACEMENT PARTS - When replacement  
parts are required, be sure the service  
technician has used replacement parts  
specified by Cambridge Soundworks and  
Creative Technology, or have the same  
characteristics as the original part.  
ATTACHMENTS - Do not use attachments not  
recommended by Cambridge Soundworks  
and Creative Technology, as such items  
may cause hazards.  
HEAT - The subwoofer should be situated  
away from heat sources such as  
radiators, heat registers, stoves, and  
other products (including amplifiers) that  
produce heat.  
OVERLOADING - Do not overload wall outlets,  
extension cords, or integral convenience  
receptacles as this can result in a risk of fire  
or electric shock.  
Unauthorized substitutions may result in  
fire, electric shock, or other hazards.  
WATER AND MOISTURE - Do not use the  
subwoofer near water—for example, near a  
bath tub, wash bowl, kitchen sink, or  
laundry tub; in a wet basement; or near a  
swimming pool; and other similar  
conditions.  
SAFETY CHECK - Upon completion of any  
service or repairs to the MegaWorks THX  
250D system, ask the service technician to  
perform safety checks to determine that the  
MegaWorks THX 250D system is in proper  
operating condition.  
OBJECT AND LIQUID ENTRY - Never push  
objects of any kind into the subwoofer  
through openings as they may touch  
dangerous voltage points or short out parts  
that could result in a fire or electric shock.  
Never spill liquid of any kind on the  
subwoofer.  
POWER SOURCES - The subwoofer 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 or  
other sources, refer to the operating  
instructions.  
ACCESSORIES - Do not place the  
WALL OR CEILING MOUNTING - The  
MegaWorks THX 250D satellites should be  
mounted to a wall or ceiling only as  
recommended by Cambridge Soundworks  
and Creative Technology.  
MegaWorks THX 250D system on an  
unstable cart, stand, tripod, bracket, or  
table. The subwoofer or satellites may fall,  
causing serious injury to a child or adult,  
and serious damage to the product. Use  
only with a cart, stand, tripod, bracket, or  
table recommended by Cambridge  
Soundworks and Creative Technology, or  
sold with the product. Any mounting of the  
satellites or subwoofer should follow the  
SERVICING - Do not attempt to service the  
subwoofer yourself as opening or removing  
covers may expose you to dangerous  
voltage or other hazards. Refer all servicing  
to qualified service personnel.  
POLARIZATION - The subwoofer may be  
equipped with a polarized alternating-  
current line plug (a plug having one blade  
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  
DAMAGE REQUIRING SERVICE - Unplug  
the subwoofer from the wall outlet or other  
power source and refer servicing to  
4
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User Guide  
MegaWorks THX 250D  
Information in this document is subject to change without notice and does not represent a commitment on the part of Creative Technology Ltd. No part of  
this manual may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, for any purpose  
without the written permission of Creative Technology Ltd. The software described in this document is furnished under a license agreement and may be  
used or copied only in accordance with the terms of the license agreement. It is against the law to copy the software on any other medium except as  
specifically allowed in the license agreement. The licensee may make one copy of the software for backup purposes.  
Copyright © 2002 by Creative Technology Ltd. All rights reserved.  
Version 1.0  
September 2002  
© 2002 Cambridge SoundWorks, Inc. All rights reserved. Cambridge SoundWorks is a registered trademark of Cambridge SoundWorks, Inc., Andover, MA,  
USA. THX is trademark or registered trademark of THX Ltd. All other logos, brand and product names are trademarks or registered trademarks of their  
respective holders. All specifications are subject to change without prior notice. Actual contents may differ slightly from those pictured.  
5
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Contents  
Introduction  
Thank you for purchasing the  
MegaWorks THX 250D by  
Cambridge SoundWorks.  
To experience the full potential of MegaWorks THX 250D,  
we recommend that you take a few minutes to read through  
this User Guide.  
Safety Warnings................................Pg 2  
Safety and Regulatory Information ..Pg 3  
Important Safety Instructions ...........Pg 4  
Introduction ......................................Pg 6  
Using the Wired Remote...................Pg 7  
Using the Auxiliary Input.................Pg 8  
Using Multiple Inputs.......................Pg 8  
Controlling Noise and Distortion .....Pg 9  
Specifications....................................Pg 9  
This high-quality 2.1 amplified  
multimedia speaker system features  
the finest drivers, precision internal  
crossover and amplifier circuitry in  
an elegant enclosure design. Analog  
and digital sources up to 24-bit/96  
kHz are supported, making  
MegaWorks THX 250D the ideal  
2.1-channel companion for the latest  
®
24-bit/96 kHz Sound Blaster  
Audigy series audio cards.  
For instructions on how to set up  
your speakers, refer to the Quick  
Start leaflet provided in the  
MegaWorks THX 250D package.  
Remember to ensure that all plugs  
are securely fastened to their  
respective sockets.  
6
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Using the Wired Remote  
Turning the system On/Off  
Varying/muting the volume  
Adjusting Sub/Treble levels  
Using Headphones  
Ensure that the subwoofer’s  
main power switch is On.  
Press the Standby/Power  
Button once. The red indicator  
above the button shuts off. The  
Master Volume Mode  
Indicator lights up.  
To switch the system to  
Standby Mode, press the  
Standby/ Power Button again.  
If the Master Volume Mode  
Indicator is lit, press or  
to vary the system volume.  
If the Master Volume Mode  
Indicator is not lit, press the  
Mode Select Button until the  
Master Volume Mode Indicator  
Press the Mode Select Button  
until the Sub or Treble Mode  
Indicator is lit.  
For private listening, you can  
connect headphones to the  
Headphones Output of the  
wired remote. This will mute  
all speakers.  
Adjust the headphones volume  
as you would for the speakers.  
The Sub Mode can be used to  
adjust the bass level you hear  
from the headphones.  
To increase or reduce the Sub/  
Treble level, press  
To increase the rate of adjust-  
ment, hold down or  
or  
.
.
is lit. Then press  
or  
.
To increase the rate of  
adjustment, hold down  
or  
.
Notes  
Notes  
Notes  
Notes  
Treble settings can be adjusted in  
the same way as for the speakers.  
When you disconnect the  
headphones, the system will revert  
to a preset default master volume  
setting (two Level Indicators lit),  
in order to prevent high  
headphones volume levels from  
being applied to the system  
speakers.  
The remote will revert to Master  
Volume Mode if left idle for some  
time.  
To mute the master volume, press  
the Mute Button once. The  
system volume will be muted. All  
previously-lit Level Indicators  
will blink during the muting.  
To return to listening, press the  
Mute Button again. Or press  
On first power-on, default Sub/  
Treble levels (flat response) are  
applied. Three Level Indicators  
will be lit to reflect this. Pressing  
On first power-on, the system  
uses a preset default master  
volume level: two volume Level  
Indicators will be lit.  
On subsequent power-on, the  
system reinstates the last-used  
master volume level.  
All volume and Sub/Treble set-  
tings will be lost if you turn off  
the main power switch, or remove  
the AC power cord or wired re-  
mote, or if there is a power inter-  
ruption. The system will revert to  
default master volume and Sub/  
Treble levels.  
boosts the level, and causes  
more Level Indicators to be lit.  
Pressing  
reduces the level, and  
causes fewer Level Indicators to  
be lit.  
Subsequent Sub/Treble settings  
will be stored during Standby  
Mode, and recalled when you next  
turn the system on using the remote.  
Fig 1: Wired  
remote  
or  
to return to normal listening.  
For your own safety, reduce the  
master volume level before switch-  
ing the system to Standby Mode.  
7
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Using Multiple Inputs  
The MegaWorks THX 250D  
allows you to mix a second audio  
Table 1: Mixing audio through Digital and Analog inputs  
Digital In  
Audio Input 1  
Audio Input 2  
Result  
program source with the main  
program source (Audio Input 1 or  
Digital Input).  
Connected  
Not connected  
Connected  
Not connected  
Connected  
Not connected  
Connected  
Connected  
Connected  
SPDIF Digital only  
Audio Input 1 and Audio Input 2 mixed  
SPDIF Digital In and Audio Input 2 mixed  
SPDIF Digital In and Audio Input 2 mixed  
Connected  
About the built-in  
Digital-to-Analog  
Connected  
Not connected  
Convertors  
MegaWorks THX 250D features  
high performance true 24-bit  
Digital-to-Analog Convertors and  
supports sampling frequencies  
from 44.1 kHz to 96 kHz, via an  
RCA SPDIF digital connection.  
Analog Input 2  
(Auxiliary Input)  
CD or MP3  
player with  
miniplug  
Table 1 lists the results of using  
the multiple inputs in different  
ways on this system.  
analog output  
Fig 2: Using Analog Input 2  
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Controlling Noise  
and Distortion  
Specifications  
MegaWorks THX 250D has  
Adjust the sound control program's  
master output level so that the  
MegaWorks THX 250D reaches a  
comfortably loud output level.  
Specifications  
Total System Burst Power: 300 W  
Satellite Frequency Response:  
150 Hz - 20 kHz  
Subwoofer Frequency Response:  
32 Hz - 150 Hz  
moderately high input sensitivity, so  
it may amplify the hum and hiss  
inherent in some audio program  
sources (more common in analog  
rather than digital sources).  
Any noise is not due to a fault in the  
speaker system. You can minimize  
background noise as follows:  
Signal-to-Noise Ratio (SNR): 99 dB  
Input voltage  
For Europe/Asia:  
230Vac 50/60 Hz 2.5A  
For USA:  
Use the MegaWorks THX 250D  
volume control as your master level  
control. Examine your computer's  
mixer software (for example,  
Surround Mixer in Sound Blaster  
software). Turn off any inputs you  
don't need (Microphone, for  
instance). Set the remaining input  
volume controls to about 70% of  
their overall scale.  
120Vac 60 Hz 5A  
Magnetic Shielding  
All satellite speakers are shielded to  
allow placement close to display  
devices that are sensitive to  
magnetic fields.  
9
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Technical Support Inside USA, Canada and Latin America  
Visit our online help websites for help with installation, answers to frequently  
asked questions, or troubleshooting tips. Our websites hold a wealth of infor-  
mation as well as up-to-the-minute software and driver upgrades.  
Limited Hardware Warranty  
Creative Technology Ltd (“Creative”) warrants the product enclosed herein to  
be free of defects for a period of twelve (12) months from the date of purchase.  
In the event of a defect in material or workmanship during the warranty period,  
Creative, at its sole discretion, will either repair or replace the defective  
product when the defective product is returned to Creative by the owner as  
further outlined herein. The remedy for this breach in warranty is limited to  
servicing or replacement only and shall not cover any other damages,  
whatsoever.  
For comments or questions regarding our Technical Support, you can also  
contact us at the following address:  
Creative Labs Inc.  
Technical Support  
1523 Cimarron Plaza  
Stillwater, OK 74075  
If after consulting our online help, you still have an installation question on a  
Creative product, you may contact us by the following numbers (please have  
your system hardware and operating system configuration information and  
Creative product model and serial numbers available for the call): Telephone  
(405) 742-6622.  
CREATIVE SPECIFICALLY DISCLAIMS ALL OTHER WARRANTIES,  
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO IMPLIED  
WARRANTIES OF MERCHANTABILITY, NON-INFRINGEMENT AND  
FITNESS FOR A PARTICULAR PURPOSE. WITH RESPECT TO THE  
USE OF THIS PRODUCT, IN NO EVENT SHALL CREATIVE BE LIABLE  
FOR ANY LOSS OF PROFIT OR ANY COMMERCIAL DAMAGE,  
INCLUDING BUT NOT LIMITED TO SPECIAL, INCIDENTAL,  
CONSEQUENTIAL, OR OTHER DAMAGES. Some states/countries do not  
allow the exclusion of limitation of liability for consequential or incidental  
damages, in which case the above limitation may not apply to you.  
Technical Support Inside Asia  
To reach Technical Support via the Internet, visit our website at:  
Creative makes final determination whether such product is defective. You  
must deliver the product with a return material authorization (RMA) number  
and a dated proof of purchase. To receive an RMA number, contact Creative’s  
Technical Support. If Creative’s Technical Support verifies the product is  
defective, the Return Material Authorization Department will issue an RMA  
number to note on the outer package of the product being returned.  
Creative cannot accept any product that does not include an RMA number on  
the package. You must use the original container (or the equivalent), pay any  
shipping charges, and assume the risk of damages or loss in transit. Creative  
may use new or reconditioned parts, and any replaced parts, or product become  
the property of Creative.  
For comments or questions regarding our Technical Support, you can also  
contact us at the following address:  
Creative Technology Ltd.  
Technical Support  
31 International Business Park  
Creative Resource  
Singapore 609921  
If after consulting our online help, you still have an installation question on a  
Creative product, you may contact us by the following numbers (please have  
your system hardware and operating system configuration information and  
Creative product model and serial numbers available for the call):(65) 6895–  
4100, telephone and (65) 6569–6640 FAX. Our operating hours are (Singapore  
Time): Mon–Fri 9:00 A.M.–6:00 P.M., Sat–Sun & Public Holidays closed.  
Creative warrants the repaired or replaced product to be free from defects in  
material and workmanship for the remainder of the initial warranty period.  
12  
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100 Brickstone Square, Andover, MA USA 01810  
Phone: (800)-367-4434 Fax: (978)-475-7219  
www.cambridgesoundworks.com  
or e-mail us at [email protected]  
0200000003009  
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