Echo Busters Phase-4 Owners manual
13'8
X
P-4
Typical Audio/Home Theater room: Full treatment
EB EBEB
P-4
X
Affordable and
Decorative
Acoustical
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EB EB
(7) 4' x 18" Echo Buster absorption panels
(2) 4' x 12" Phase-4 tuning towers
(2) 4' x 9" Bass Buster low frequency traps
EB EB
(5) 4' x 12" Double Buster diffusion panels
18'
(4) 15" Corner Buster triangular ceiling traps
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Treatments
for the
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21st Century
Thank you for choosing Echo Busters.
In order to get the maximum benefit from
your new purchase, here are some hints:
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This diagram shows the idealized placement of
Echo Busters products. Although this is an ideal
setup, you can use a modular approach and
start with a few units then add more units as
needed. Room acoustics will respond differently
based on carpeting, doors, glass, furniture and
layout. Experimentation yields the best results.
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DB
1) If your order includes Corner Busters
(15” triangles), locate them in the ceiling corners of your room. Position them
with one point facing down to the ground (where the two walls meet below the
ceiling) and the other two points of the Corner Buster on the ceiling where the
walls touch the ceiling. This essentially trisects the corner juncture and
smoothes off the sharp corner. Since all frequencies terminate in room
corners, the Corner Busters eliminate the “rebound” or “megaphone” effect of
these troublesome areas. The Corner Busters come with Velcro attached on
all three sides for easy installation. They also come equipped with thin nails to
use if the Velcro might damage your wall. Use three of the 1 inch nails per
Corner Buster, one in each corner, to hold the units in place. Gently push the
nails partly through the corners, at an angle which allows you to push or
hammer into the ceiling or the wall. Insert all three sides. Now separate the
fibers of the fabric and pull over the nail to hide it.
2) If your order includes Echo Buster absorption panels (the panels
with the soft material inside):
Use at least three panels on the wall behind
Wall
Mid-to-high frequency absorption
(375 Hz. - 20000 Hz.)
and between the speakers. The others are
positioned on the side walls at the primary
reflection points and elsewhere in the room to
tame flutter echoes. To find the primary, or first,
reflection points, have someone hold a mirror on
the side wall midway between the speaker and
the listening position. While sitting in the
listening position, have them move the mirror
The Echo Buster Absorption Panel:
Midrange and higher frequencies are completely
absorbed. Set these panels up around the front
of the room for improved imaging and focus
DB
LEGEND:
EB = Echo Buster
DB = Double Buster
BB = Bass Buster
P4 = Phase-4
CB = Corner Buster
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Wall
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DB
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toward the speaker. When you see the reflection of the right speaker on the
right wall, that is the first reflection point! Do the same for the left wall.
EB
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Chair
A basic reflective room
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EB
Chair
Use a mirror to find the first reflection points
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In the figure on the left, the initial sound from the speaker is bouncing all
around the room and arriving at your ear with several milliseconds delay. This
adds to a confused image and fuzzy soundstaging. In the figure on the right,
the sound issued from the speakers arrives directly at the ears with no early
reflection from the walls. This allows for a precise and accurate rendering of
the original recorded event.
Try to space the panels evenly between the ceiling and floor to cover your ears
whether sitting or standing (the bottom of the panel at least 18” – 30” above the
floor). If one of the walls has an opening or other anomaly that does not permit
hanging at the reflection point, hang it as closely as possible to that point or
use a panel on a stand. All Echo Busters absorption and Double Busters
diffusion panels can be ordered with optional metal feet or with a 360° fabricwrap finish on wooden stands (for additional cost):
Just screw the wood screws through the middle holes into the bottom of the
panel
Another Echo Buster panel should be deployed at the reflection of the left
speaker on the right wall (the secondary reflection point), which will be closer
to the listening position than the first panel installed. Again, do the same for
the left wall. Panels are also useful when placed across the front corners,
“caddy-corner” (where Bass Busters are shown in the diagram). By creating
this air space behind the panel, absorption is increased in the lower frequency
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