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5. Subwoofer Installation Guide

The following instructions are for THX Certified as well as non-certified Dolby Digital/DTS A/V 
receivers or surround processors.  

1.  

Turn off your receiver or multichannel amplifier and make sure the THX-SUB is off

2.

Use high quality shielded interconnect with RCA connectors to link the THX-SUB to the output 

of your receiver or multichannel amplifier 

3.

Set the Operational Mode switch on your THX-SUB to the THX position

4.

Set the Phase switch to Normal

5.

Turn on your system and the THX-SUB

6.

Navigate to the Speaker Setup menu of your receiver or processor to calibrate channel level 

and size of your front, center and surround speakers

7. 

Set your main and surround speakers to Small on your receiver or processor

8.

Set the roll off point to the following:

80Hz (THX standard) for THX Select loudspeakers
120-150Hz for other small speakers (Crystal Acoustics Plasma, SmArt System and Super Baby series)
The higher the crossover, the better the power handling of your main speakers 

11.

Change the Phase Control of your THX-SUB between Normal and Reverse positions

12.

Listen to music with prominent bass

13.

Stay with the switch position that produces the fullest, deepest and tightest bass in your listening area

14.

Use the pink noise test signal of your receiver, processor or Test-DVD

15.

Take a seat at the main listening and viewing position

16.

Use an SPL meter (C scale, slow) and calibrate the output sound level of each channel 

(fronts, center, surrounds) plus your subwoofer so that all outputs levels are equal

17.

When using a single THX-10SUB or THX-10SUBt subwoofer, you must increase the subwoofer 

output level of your receiver or processor by 4.5dB to get the proper bass levels to meet 
THX standards

18.

Connection of multiple subwoofers to a receiver or processor with only one SUB/LFE output 

can be accomplished with Y-adapters (RCA male to two RCA female connectors)

6. Troubleshooting 

6.1 No sound from THX-SUB

Make sure your THX-SUB is plugged into an AC outlet
Make sure the LED on the back of the THX-SUB is on and lit red (operating) and not orange (stand-by)
Otherwise switch the subwoofer's power off then on again 
Make sure the 

Subwoofer Y/N

option is set to Yes in your receiver or processor's speaker setup menu 

Make sure the Volume Control is not set to Minimum if the subwoofer's in Variable Mode
Make sure your subwoofer interconnect is functioning properly and replace any defective cables

6.2 Boomy, dull, out of focus low frequencies

Try moving your subwoofer away from corners or walls in small steps
The boom results from exciting room resonances
Small changes in position can make a big difference

6.3 50/60 cycle hum coming from the subwoofer

Your THX-SUB is reproducing ground loop hum from elsewhere in your system

Make sure interconnect and speaker cables are routed away from AC power cords and component

power supplies to avoid induced hum

Cross interconnects at 90 degrees to AC power cords and keep them separated by at least an inch.

Also connect the power cord of your THX-SUB and receiver/processor and multichannel amplifier to the
same AC outlet to keep the grounds all at the same potential avoiding hum

7. Specifications

Model nam

THX – T3

THX - SURROUND

THX - DIPOLE

THX - B1

THX - CENTER

THX-12SUB

THX-10SUBt

THX-10SUB

CROSSOVER TYPE

31/2-way

2-way

2-way

2-way

2-way

THX/Variable

THX/Variable

THX/Variable

MAGNETICALLY SHIELDED

 

WOOFER 6.5’’

3

1

1

1

1

WOOFER 12’’

WOOFER 10’’
TWEETER 1’’ NEODYMIUM MAGNET

1

1

2

1

1

POWER (Wrms)

180

100

100

100

100

200

120

120

MAXIMUM POWER (Watt)

350

200

200

200

200

SENSITIVITY (dB/W/m)

92

88

88

89

89

93

92

92

IMPEDANCE (Ohm)

4

8

8

4

4

4

4

4

FREQUENCY RESPONSE (Hz - kHz)

35-22k

35-22k

45-22k

45-22k

45-22k

20-350

20-350

20-350

BASS REFLEX

 

BI-WIRE GOLD PLATED BINDING POST
FRONT DIMENSIONS DxHxW (mm)

165x1200x160

165x1030x160

310x330x140

165x370x230

530x165x170

470x470x350

470x470x310

470x470x310

Summary of Contents for THX-10SUB

Page 1: ...I N S T R U C T I O N S M A N U A L THX T3 THX B1 THX ST THX C THX D THX 10SUB THX 10SUBt THX 12SUB ...

Page 2: ...ed off before connecting speakers Before powering the subwoofer make sure the local operating voltage is the same as that specified for your unit Turn subwoofer off before connecting the input cable Be sure to connect plus and minus terminals of the speakers binding posts to the corresponding plus and minus terminals of the receiver or multichannel amplifier Make sure that all connections are secu...

Page 3: ...djust for differently sized home entertainment environments THX Select is their reference standard for smaller rooms cali brated to define reference level performance in rooms of about 2000 square feet Visit www thx com for more information on THX and their innovative technologies 1 2 THX Select Certified Speaker Features Crystal Acoustics speaker systems optimized for a stupendous powerful and dy...

Page 4: ...e them too far apart or you ll have a hole in the center of the soundstage Do not place them too close together or the soundstage collapses into a fuzzy mono ball of sound with no definition or separation 2 1 2 Placement of THX Center Speaker TV Video Displays Place the Center THX directly above or below the screen whichever best points towards ear level Projector Displays Place the Center THX beh...

Page 5: ...deal for surround effects It s preferred for best performance from THX Select Certified systems Your THX Dipole surround speaker provides Movie Theater sound as immersive and dynamically impres sive as THX standards can make them A dipole speaker paints the walls and ceiling with sound There s very little direct output toward the listener The reflected sound off the room s walls and ceiling create...

Page 6: ...of connection methods 1 Single Pair For each channel jumper links in place connect the speaker cable s red positive con nector to the red positive output binding post of your receiver or multichannel amplifier and the black neg ative connector to the black output terminal Switching positive and negative on one channel s connec tions reduces bass output and creates ill defined bloated imaging Once ...

Page 7: ...e accomplished with Y adapters RCA male to two RCA female connectors 6 Troubleshooting 6 1 No sound from THX SUB Make sure your THX SUB is plugged into an AC outlet Make sure the LED on the back of the THX SUB is on and lit red operating and not orange stand by Otherwise switch the subwoofer s power off then on again Make sure the Subwoofer Y N option is set to Yes in your receiver or processor s ...

Page 8: ...r inappropriate components Our handbook is a treasure chest of information and descriptions of the latest technologies and their impact It includes An innovative training system Over 350 Questions and Answers Many Frequently Asked Questions with Answers FAQ s Over 100 color drawings and photos The advantages of Room Acoustics Designer are Takes into consideration furnishings their location and the...

Page 9: ...y for cinemas mixing studios home theatres and DVDs THX Ltd was established by George Lucas to ensure that the entertainment consumer experienced music and films as the director intended THX is a trademark or a registered trademark of THX Ltd All rights reserved ...

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