MartinLogan Sequel II - Manual (Page 14)

Page 14 Sequel II User's Manual
YYYYYour R our R our R our R our Room oom oom oom oom
This is one of those areas that requires both a little
background to understand and some time and experi-
mentation to attain the best performance from your
system.
Your room is actually a component and an important
part of your system. This component is a very large
variable and can dramatically add to, or subtract from,
a great musical experience.
All sound is composed of waves. Each note has its own
wave size, with the lower bass notes literally encompass-
ing from 10' to as much as 40'! Your room participates in
this wave experience like a 3 dimensional pool with
waves reflecting and becoming enhanced depending
on the size of the room and the types of surfaces in the
room.
Remember, your audio system can literally generate all
of the information required to recreate a musical event in
time, space, and tonal balance. The purpose of your
room, ideally, is to not contribute to that information.
However, every room does contribute to the sound and
the better speaker manufacturers have designed their
systems to accommodate this phenomenon.
TTTTTerminology erminology erminology erminology erminology
Standing Waves Standing Waves Standing Waves Standing Waves Standing Waves. The parallel walls in your room will
reinforce certain notes to the point that they will
sound louder than the rest of the audio spectrum
and cause “one note bass”, “boomy bass” or “tubby
bass”. For instance, 100Hz represents a 10' wave-
length. Your room will reinforce that specific
frequency if one of the dominant dimensions is 10'.
Large objects in the room such as cabinetry or
furniture can help to minimize this potential problem.
Some serious “audiophiles” will literally build a
special room with no parallel walls just to get away
from this phenomenon.
Reflective Surfaces (near-field reflections) Reflective Surfaces (near-field reflections) Reflective Surfaces (near-field reflections) Reflective Surfaces (near-field reflections) Reflective Surfaces (near-field reflections). The
hard surfaces of your room, particularly if close to
your speaker system, will reflect those waves back
into the room over and over again, confusing the
clarity and imaging of your system. The smaller
sound waves are mostly affected here and occur in
the mid and high frequencies. This is where voice
and frequencies as high as the cymbals can occur.
Resonant Surfaces and Objects Resonant Surfaces and Objects Resonant Surfaces and Objects Resonant Surfaces and Objects Resonant Surfaces and Objects. All of the surfaces
and objects in your room are subject to the frequen-
cies generated by your system. Much like an
instrument, they will vibrate and “carry on” in
syncopation with the music and contribute in a
negative way to the music. Ringing, boominess, and
even brightness can occur simply because they are
“singing along” with your music.
Resonant Cavities Resonant Cavities Resonant Cavities Resonant Cavities Resonant Cavities. Small alcoves or closet type areas
in your room can be chambers that create their own
“standing waves” and can drum their own “one
note” sounds.
Clap your hands. Can you hear an instant echo respond
back? You have near-field reflections. Stomp your foot on
the floor. Can you hear a “boom”? You have standing
waves or large panel resonances such as a poorly
supported wall. Put your head in a small cavity area and
talk loudly. Can you hear a booming? You’ve just
experienced a cavity resonance.
Room Acoustics