Surround Speakers; Placement Of Thx-Dipole Surround Speakers; Placement Of Thx-Surround Speakers; Thx-12Sub, Thx-10Sub And Thx-10Subt Subwoofers - Crystal Acoustics THX-T3 Instruction Manual

2.2 Surround Speakers

Surround speaker placement depends on the audio format (5.1,7.1, etc.) and the speakers in use. Dipoles
create a diffused soundfield ideal 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 creates an
inviting, enveloping, experiential soundfield, immersing you directly into the movie experience. Once you
heard a properly set up system, it's hard to go back to anything else as it improves the entire experience
no matter what you're watching... or listening to.
2.2.1 Placement of THX-Dipole
Surround Speakers
The total of a speaker's radiated energy in all direc-
tions is called its power response. Your Crystal
Acoustics THX-Dipole surround speaker exhibits a
THX-mandated flat power response. The total ener-
gy radiated by a speaker--to the front, above, below,
behind, and to the sides--must together average a
flat response. Listeners anywhere in the soundfield
will enjoy surround effects
Mount your THX-Dipoles on the side walls
adjacent to the listening position about 2ft
(66cm) above ear height

2.2.2 Placement of THX-Surround Speakers

In some cases, on-wall dipoles aren't practical because of a room's layout. Just place another pair of
THX-Surround speakers behind the listening area for the same THX Select Certified home theater sur-
round experience.
Place the THX-Surround Speakers slightly behind the primary listening position
Adjust them to face each other behind the seating area
Optionally, experiment by adjusting the speakers to point at an angle towards the back or side walls
The sound reflects off the walls before reaching the listening area which simulates the L/R speaker
arrays found in many movie theaters
8
Figure 2: Dipole placement

2.3 THX-12SUB, THX-10SUB and THX-10SUBt Subwoofers

Best positioning for one subwoofer can generally be found using the following suggestions:
Try placing the subwoofer close to the
listening position
Avoid positioning it equidistantly from
room boundaries like walls
Avoid positioning it near corners where
walls are not of solid construction
Corner placement may excite room
resonance resulting in boomy, muddy bass
Further experiment with speaker positioning;
place the subwoofer near your listening
position and play jazz with acoustic bass
and move around the room
Place the subwoofer where you hear the
deepest, best controlled and most articulate
bass frequencies.

2.3.1 Multiple Subwoofers

Two Subwoofers
Two subwoofers drive low frequencies more uniformly throughout the room because they:
Reduce resonant modes and standing waves
Extend bass response
Improves bass impact, slam, definition and control
Delivers higher sound pressure levels and superior dynamics for movies and multichannel music
Using two THX-10SUB or THX-10SUBt subwoofers brings the system up to THX Select Certified
specification
Place each subwoofer at the midpoint of the opposing wall
Four Subwoofers
Four THX-SUB subwoofers delivers stupendous, earth shattering bass to your home
entertainment system
Really pressurizes a room and improves low-frequency extension
Improves the power response almost everywhere in the listening area
Place each subwoofer at the four walls' midpoint
Figure 3: Placement of one subwoofer
9