Cambridge SoundWorks THX 250D User Manual

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Page 1

MegaW orks THX 250D

Multimedia Speaker System

User Guide

™

Page 2

Safety Warnings

CAUTION: This Symbol indicates that the marked item may be Hot and should not be touched without proper care.

- To minimize the risk of burns and other injuries to children, position the device such that hot surfaces are out of their reach.

- To minimize the risk of fire, keep flammable materials like paper and cloth (for example, curtains) away from the hot surface.

Warning:

Do not expose this apparatus to dripping or splashing fluids, and ensure that no objects filled with liquids — such as vases — are placed on the apparatus.

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Safety & Regulatory Information

Notice for the USA

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:

❒

Reorient or relocate the receiving antenna.

❒

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.

❒

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.

Modifications

Any changes or modifications not expressly approved by the grantee of this device could void the user’s authority to operate the device.

The following sections contain notices for various countries:

Notice for Canada

This apparatus complies with the Class B limits for radio interference as specified in the Canadian Department of Communications Radio Interference Regulations. 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.

Important 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.

CAUTION

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.

Compliance

This product conforms to the following Council Directive: Directive 89/ 336/ EEC, 92/ 31/ EEC (EMC), 73/ 23/ EEC (LVD)

Declaration of Conformity

According to the FCC96 208 and ET95-19, Manufacturer/Importer’s Name: Creative Labs, Inc. Manufacturer/Importer’s Address:1901 McCarthy Boulevard

declares under its sole responsibility that the product Trade Name: Creative Labs Model Numbers: MMS0650 has been tested according to the FCC / CISPR22/85 requirement

for Class B devices and found compliant with the following standards:

EMI/EMC: ANSI C63.4 1992, FCC Part 15 Subpart B Complies with Canadian ICES-003 Class B.

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.

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.

Milpitas, CA. 95035 United States Tel: (408) 428-6600

Compliance Manager

Creative Labs, Inc.

September 11, 2002

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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.

RETAIN INSTRUCTIONS - The safety and

operating instructions should be retained for future reference.

HEED WARNINGS - All warnings on the

subwoofer and in the operating instructions should be adhered to.

FOLLOW INSTRUCTIONS - All operating and

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.

ATTACHMENTS - Do not use attachments not

recommended by Cambridge Soundworks and Creative Technology, as such items may cause hazards.

WATER AND MOISTURE - Do not use the

subwoofer near water—for e xample, near a bath tub, wash bowl, kitchen sink, or laundry tub; in a wet basement; or near a swimming pool; and other similar conditions.

ACCESSORIES - Do not place the

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

manufacturer’s instructions, and should use a mounting accessory recommended by Cambridge Soundworks and Creative Technology.

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.

HEAT - The subwoofer should be situated

away from heat sources such as radiators, heat registers, stoves, and other products (including amplifiers) that produce heat.

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.

POLARIZATION - The subwoofer may be

equipped with a polarized alternatingcurrent 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

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.

POWER-CORD PRO TECTION - Po wer-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.

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.

OVERLOADING - Do not o verload wall outlets,

extension cords, or integral convenience receptacles as this can result in a risk of fire or electric shock.

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.

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.

DAMAGE REQUIRING SERVICE - Unplug

the subwoofer from the wall outlet or other power source and refer servicing to

qualified service personnel under the following conditions:

a) When the power-supply cord or plug is

damaged.

b) If liquid has been spilled, or object have

fallen into the subwoofer.

c) If the subwoofer has been exposed to rain

or water.

d) If the subwoofer does not operate normally

by following the operating instructions; or exhibits a distinct change in performance.

e) If the product has been dropped or

damaged in any way.

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. Unauthorized substitutions may result in fire, electric shock, or other hazards.

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.

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.

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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.

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.

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Introduction

Contents

Thank you for purchasing the MegaWorks THX 250D by Cambridge SoundWorks.

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

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.

series audio cards.

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

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Using the Wired Remote

To turn the system On/OffTo turn the system On/Off

Turning the system On/Off

❒

Ensure that the subwoofer’s main power switch is On.

❒

Press the

Button

Standby/Power

once. The red indicator

above the button shuts of f. The

Master Volume Mode Indicator

❒

T o switch th e system to

Standby Mode

lights up.

, press the

Standby/ Power Button

again.

Varying/muting the volume Adjusting Sub/Treble levels Using Headphones

Master Volume Mode

❒

If the

Indicator

is lit, press or

to vary the system volume.

Master Volume Mode

❒

If the

Indicator

is not lit, press the

Mode Select Button

until the

Master V olume Mode Indicator is lit.

Then press or .

❒

To increase the rate of adjustment, hold down or .

❒

Press the until the

Indicator

❒

To increase or reduce the

Treble

❒

To increase the rate of adjust-

Mode Select Button

Sub

Treble Mode

is lit.

level, press or .

ment, hold down or .

Sub/

❒

For private listening, you can connect headphones to the

Headphones Output

wired remote. This will mute all speakers.

❒

Adjust the headphones volume as you would for the speakers.

Sub Mode

❒

The adjust the bass level you hear from the headphones.

of the

can be used to

Notes

• On first power-on, the system uses a preset default master volume level: two volume

Indicators

• On subsequent power-on, the system reinstates the last-used master volume level. All volume and

•

tings will be lost if you turn off the main power switch, or remove the AC power cord or wired remote, or if there is a power interruption. The system will revert to default master volume and

Treble

will be lit.

Sub/Treble

levels.

Level

set-

Sub/

Notes

• The remote will revert to

V olume Mode

time.

• To mute the master volume, press

Mute Button

the system volume will be muted. All previously-lit will blink during the muting.

• To return to listening,

Mute Button

or to return to normal listening. For your own safety, reduce the

•

master volume level before switching the system to

if left idle for some

Level Indicators

again. Or press

Master

once. The

press the

Standby Mode

Notes

• On first power-on, default

Treble

levels (flat response) are applied. Three will be lit to reflect this. Pressing

boosts the level, and causes

Level Indicators

more Pressing reduces the level, and

causes fewer be lit.

Subsequent

•

will be stored during

Mode

turn the system on using the remote.

Sub/Treble

, and recalled when you next

Sub/

Level Indicators

to be lit.

Level Indicators

settings

Standby

Notes

Treble

• the same way as for the speakers.

• When you disconnect the

headphones, the system will revert to a preset default master volume setting (two in order to prevent high headphones volume levels from being applied to the system speakers.

settings can be adjusted in

Level Indicators

lit),

Fig 1: Wired

remote

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Using Multiple Inputs

The MegaWorks THX 250D allows you to mix a second audio program source with the main program source (Audio Input 1 or Digital Input).

About the built-in Digital-to-Analog 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.

Table 1 lists the results of using the multiple inputs in different ways on this system.

Table 1: Mixing audio through Digital and Analog inputs

Digital In Audio Input 1 Audio Input 2 Result

Connected Not connected Not connected SPDIF Digital only

Not connected Connected Connected Audio Input 1 and Audio Input 2 mixed

Connected Connected Connected SPDIF Digital In and Audio Input 2 mixed Connected Not connected Connected SPDIF Digital In and Audio Input 2 mixed

Analog Input 2 (Auxiliary Input)

CD or MP3 player with miniplug analog output

Fig 2: Using Analog Input 2

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Controlling Noise and Distortion

Specifications

MegaWorks THX 250D has 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:

❒

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.

❒

Adjust the sound control program's master output level so that the MegaWorks THX 250D reaches a comfortably loud output level.

Specifications

Total System Satellite Frequency Response: 150 Hz - 20 kHz Subwoofer Frequency Response: 32 Hz - 150 Hz Signal-to-Noise Ratio (SNR): 99 dB

Input voltage For Europe/Asia:

230Vac 50/60 Hz 2.5A

For USA:

120Vac 60 Hz 5A

Burst

Power: 300 W

Magnetic Shielding

All satellite speakers are shielded to allow placement close to display devices that are sensitive to magnetic fields.

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Limited Hardwar e W ar ranty

Creative Technology Ltd (“Creative”) w arrants 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.

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.

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. T o recei ve an RMA number , contact Creati v e’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. Creative warrants the repaired or replaced product to be free from defects in

material and workmanship for the remainder of the initial warranty period.

T echnical 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 information as well as up-to-the-minute software and driver upgrades.

http://www.americas.creative.com/support/

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

T echnical Support Inside Asia

To reach Technical Support via the Internet, visit our website at:

http://asia.creative.com/support/

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 F AX. Our operating hours are (Singapore Time): Mon–Fri 9:00 A.M.–6:00 P.M., Sat–Sun & Public Holidays closed.

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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 info@cambridgesoundworks.com

0200000003009

Cambridge SoundWorks THX 250D User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual