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2

3. If you purchased a Cambridge

SoundWorks 

Slave Subwoofer

,

its accessory pack should
contain:
• One spare T3.15A, 250V fuse
• 25 feet of 16 gauge

speaker wire

• One wire stripper
• Four wire nuts
• Four square rubber feet

4. We suggest that you keep the

shipping carton and packing
materials in case you later
move, or have to ship your
subwoofer.

1. Upon unpacking your 

Powered

Subwoofer

 (or 

Slave Subwoofer

),

please examine carefully for any
signs of shipping damage. If
there is any damage, 

do not

install or use the subwoofer

.

Consult the store where you
purchased the subwoofer for
assistance. If purchased through
our mail order catalog service,
call Cambridge SoundWorks
at 1-877-937-4434.

2. If you purchased a Cambridge

SoundWorks 

Powered

Subwoofer

, its accessory pack

should contain:
• One spare T3.15A, 250V fuse
• Four square rubber feet

Unpacking

Note: Make all connections with the
Powered Subwoofer switched off.

The 

Powered Subwoofer

 can be

connected to the main amplifier’s
speaker outputs, from stereo
preamp outputs or from a mono
subwoofer output.

Using the speaker outputs of

your main amplifier to drive the

Powered Subwoofer

 is usually the

best way to connect the 

Powered

Subwoofer

, even if you have a

separate preamp or subwoofer
output (like the subwoofer output
on a Dolby Digital

®

 (AC-3) system).

If you have large Left and Right

speakers and a Dolby Digital (AC-3)
system, please be sure to read the
note at the end of this section.

Connection Method One:

Connect directly to an amplifier or
receiver’s speaker output terminals
using conventional speaker wire
(Figure 1 on page 3). You can use
lightweight speaker wire (20-22
gauge) because this is a high im-
pedance connection. The 

Powered

Subwoofer

 uses virtually none of

the amplifier or receiver’s output
power. Be sure to connect these
new speaker wires to the same

Audio And AC Power Connections

speaker outputs used by your main
speakers. Do not use any additional
speaker output terminals your
amplifier or receiver may have.

Alternatively, you may connect

the speaker wires between the

Powered Subwoofer

 and the input

terminals of your main speakers
instead of the amplifier or receiver’s
speaker output terminals.

Be sure the speaker wire connects

the positive (+) terminals of the
subwoofer to the positive (+)
terminals of the amplifier or re-
ceiver (and similarly connects the
negative (–) terminals together). All
two-conductor speaker cable is
coded along one conductor by
lettering, a stripe or a raised bead
-or- the appearance of the two
conductors differs, usually one
copper and one silver. This allows
you to easily connect the proper
conductor to each terminal.

Connection Method Two:

 Connect

from a stereo preamp output to the

Powered Subwoofer’s

 Line Level

inputs. A suitable length of conven-
tional stereo phono cable with RCA
plugs at each end is all you need if
your preamp has an unused stereo
preamp output.

Summary of Contents for Powered Subwoofer

Page 1: ...ecting A Slave Subwoofer 4 Placement 5 The Subwoofer Level Control 6 Selecting Low Pass Frequency 7 Advantages Of The Slave Subwoofer 8 The Final Touch 8 Installing Low Cut Filters 9 Cleaning The Cabinets 9 Replacing The Fuse 10 Difficulty 10 Limited Warranty 11 Powered Subwoofer Slave Subwoofer by Henry Kloss Instructions for ...

Page 2: ... down and keep it in a secure area This is for your security IMPORTANT The lightning flash with arrowhead within an equilateral triangle is intended to alert the user of the presence of uninsulated dangerous voltage within a product s en closure that may be of sufficient magnitude to constitute the risk of electric shock to persons SHOCK HAZARD DO NOT OPEN WARNING TO PREVENT THE RISK OF ELECTRIC S...

Page 3: ...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 PROTECTION AC power cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them pay ing particu...

Page 4: ... called upon to reproduce more than music in home theater systems they are called upon to reproduce movie soundtracks And modern movie soundtracks contain a lot of energy at very low frequen cies on sound effects To do full justice to these effects as well as to the musical low frequencies missed by most speakers the Cambridge SoundWorks powered subwoofer systems reproduce at high power the lowest...

Page 5: ...peakers and a Dolby Digital AC 3 system please be sure to read the note at the end of this section Connection Method One Connect directly to an amplifier or receiver s speaker output terminals using conventional speaker wire Figure 1 on page 3 You can use lightweight speaker wire 20 22 gauge because this is a high im pedance connection The Powered Subwoofer uses virtually none of the amplifier or ...

Page 6: ... Main To connect between a stereo preamp and a stereo power amp combine a suitable length stereo phono cable with two Y adapters Each adapter is one RCA male plug to two RCA female jacks Figure 2 Some receivers and integrated amplifiers have preamp outputs and power amp inputs that are accessible by removing jumpers from the back panel Connection Method Three Connect from a subwoofer output using ...

Page 7: ... one they will couple acoustically even when they are placed several feet apart 20 minutes The Powered Subwoofer rapidly activates as soon as a new signal is present This feature oper ates when the switch labeled Auto off Setting is in the Auto position Most home users will find this setting to be appropriate The manual position of the Auto off Setting switch keeps the amplifier operating and draw...

Page 8: ...he installation permanent 1 The ear cannot localize the very low bass sounds reproduced by the Powered Subwoofer This is why it is possible to use a single powered subwoofer to reproduce all the 25 to 40 Hz bass a sound Placement FIGURE 4 HOW ROOM PLACEMENT AFFECTS BASS RESPONSE Left Satellite Right Satellite Powered Subwoofer Surround Surround Left Satellite Right Satellite Powered Subwoofer Surr...

Page 9: ...ning sessions using different films and musical sources to arrive at the single best setting for the Level Control The Subwoofer Level Con trol is intended to be set once and then left alone Once you have decided on a setting use the Bass tone control on your main electron ics to compensate for the inevitable small differences in bass output between different recordings If you experience any diffi...

Page 10: ... the Powered Subwoofer 100 Hz For use with smaller bookshelf sized speaker systems with less low bass reach Use this setting with the Cambridge SoundWorks Model Seventeen and Ensemble IV 140 Hz Use this setting with small main speakers Special note about line level subwoofer outputs Many receivers and all Dolby Digital AC 3 processors feature dedicated subwoofer outputs Some of these outputs are f...

Page 11: ...bass output possible it may be necessary to add our optional passive Slave Subwoofer The Slave Subwoofer consists of an acoustic suspension bass driver like that of the Powered Subwoofer housed in an identical cabinet and powered by the amplifier within the Powered Subwoofer Because of the acoustic coupling between the two bass drivers and because together they present a load enabling the amplifie...

Page 12: ...one filter s INPUT FROM AMP leads to speaker outputs on your receiver or amplifier then connect the speaker wire to the filter s OUTPUT TO SPEAKER leads with the wire nuts supplied Or you can attach a filter right to the back of a speaker Connect the filter s OUTPUT TO SPEAKER leads to your speaker s input terminals As with all speaker connections be sure to maintain consistency with respect to th...

Page 13: ...e of a different rating 3 Replace with T3 15A 250v fuse 4 Invert the fuse holder and insert it into its receptacle 1 Use a small flat screwdriver as a lever to remove the fuse holder in the AC cord receptacle 2 Invert the fuse holder and remove the blown fuse If you suspect a problem with your subwoofer contact the store where it was purchased If a problem is confirmed you will need to return the ...

Page 14: ...ipment for which it is not intended such as con necting any speaker other than a Slave Subwoofer to the Powered Subwoofer s Slave Subwoofer Output Each of these two warranties is the sole and express warranty of the product named in its title and is in lieu of all other warranties expressed or implied of merchant ability fitness for purpose or otherwise In no event shall Cam bridge SoundWorks be l...

Page 15: ...311 Needham Street Newton MA 02464 1 877 937 4434 Fax 617 527 3194 www cambridgesoundworks com Email info cambridgesoundworks com P81 1010 0400 A Company ...

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