The mid-bass (approx. 140
-
400
Hz).
An over accen-
tuated mid-bass region will yield a very muddy and "boo-
my" qual~ty to the music.
A
system shy of mid-bass will
'
sound hollow and thin. Controls in this region are impor-
tant for good overall balance.
The mid-range (approx.
400
-
2,600
Hz).
As the area
where the ear is most
sensitiv.e to tonal balance, the mi-
drange is important in adjusting the qualitative sonic
characteristics of your system. There is controversy
among engineers and audiophiles as to what the proper
balance should be in this range. Moreover, you will find
some settings optimum for certain types of music with
other settings just right lor different types.
The upper mid-range (approx. 2,600
-
5,200
Hz).
Speaker disigners often boost output in this range to ef-
fect a quality of "presence" to the music. Too much en-
ergy, on the other hand, sounds overbearingly harsh and
strident. A good balance should be achieved between
this and a more muffled sound.
The
high
end (approx. 5,200
-
20,000
Hz).
The region
up to only about
12
kHz
or so is what is normally per-
ceived as high frequencies. Adjustment in this
range af-
fects the brilliance of music, with too much boost in en-
ergy yielding an unpleasant and piercing quality.
The last 8,000
Hz
contains very little musical material.
And most adults have hearing which control in the
I4
-
20
kHz
range will have a very subtle effect. It can be
used to add a little more dimension to the sound or as
very high frequency noise
filter.
Approximate frequency ranges for
music1 instruments and voice
500
Hz
full boost
1
kHz
full boost
m-m-
N
bm
-
rd
~mm-
m
0 0
OOg
0 00
X X
xxxg
g
0 00
Frequency
(Hz)
500
Hz
full boost
1
kHz
full cut
h)
n
mm'
n~
0
0 00:
Frequency
(Hz)
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