Low Freq Filter; High Freq Filter - Mackie HR824 MK2 Owner's Manual

4. LOW FREQ FILTER

NORMAL
QUARTER HALF WHOLE
( NORMAL )
ACOUSTIC SPACE
The LOW FREQ FILTER switch inserts a low-frequency
rolloff into the response curve.
• For some applications, the low-frequency output of
the HR824 MK2 may impair your ability to make mix
judgements.
• For THX applications, use the 80Hz setting.
• For non-THX applications where a sub-woofer isn't
enhancing low-frequency output use the 37Hz
(NORMAL) position.
• The LOW FREQ switch affects the low-frequency
content of your mix. Remember how things work in
reverse, so removing the deep bass content on playback
may actually increase it in the final mix.
• You can use the LOW FREQ switch's 80Hz position to
simulate a smaller loudspeaker, especially one with
limited low-frequency capability (like a certain popular
2-way nearfield monitor). You may need to do this if a
small speaker is the eventual destination of your mix,
or perhaps just to see how your mix sounds on a clock
radio.
–
80Hz 47Hz 37Hz 2dB
( NORMAL ) ( NORMAL )
LOW CUT
LOW FREQ HIGH FREQ.
QUARTER SPACE
THX = 80Hz
–
10dB
CONSOLE
SPEAKERS IN CORNERS
A
OFF NORMAL
QUARTER
ACOUSTIC SPACE APPLICATIONS
INPUT
SENSITIVITY ACOUSTIC SPACE
LOW CUT LOW CUT
24dB/oct BUTTERWORTH
0
dB
–
3dB
37Hz 47Hz 80Hz
LOW FREQ
LISTED COMMERCIAL
AUDIO EQUIPMENT
65HJ
–
10dB
OFF NORMAL
QUARTER HALF
INPUT
SENSITIVITY ACOUSTIC SPACE
SIGNAL INPUTS BAL/UNBAL
PHONE XLR
Removing the low-frequency content also allows
you to raise the overall output level somewhat. Low-
frequency information requires the largest amount of
an amplifier's output, so restricting the low-frequency
content allows raising the mid-frequency level
0 2dB STANDBY ON
+
somewhat. If your client insists on mixing LOUD, this
AUTO
ON
may be a workable strategy.
POWER MODE
HALF SPACE

5. HIGH FREQ FILTER

CONSOLE
SPEAKERS AGAINST WALL
B
80Hz 47Hz
LOW CUT
HALF WHOLE
( NORMAL )
LOW FREQ
0
dB
–
2dB
–
4dB
The HIGH FREQ FILTER switch tailors the overall
high-frequency response by ±2 dB beginning at 10kHz.
20 100Hz
ACOUSTIC SPACE
Leave this switch in the 0 (NORMAL) position unless:
• You want to subtly brighten or darken the sound of the
™
speakers.
INTERNAL BI•AMPLIFICATION
150W. L.F. / 100W. H.F.
• Perhaps you have hearing loss caused by too many
nights in front of a double Marshall stack.
• You just like to mix on the bright side or dull side.
If your mixes consistently sound dull or dark when
you listen elsewhere, this usually indicates that your
monitors are too bright, relative to your normal hearing.
A bit less high-frequency energy usually fixes this, and
you can force the mix in this direction by reducing the
high-frequency output of the monitors by using the
–2 dB position of the switch.
–
80Hz 47Hz 37Hz 2dB
( NORMAL ) ( NORMAL )
LOW CUT
WHOLE
( NORMAL )
LOW FREQ HIGH FREQ.
PATENT NO:
DES. 387,351
RCA
WHOLE SPACE
CONSOLE
SPEAKERS AWAY FROM WALLS
C
–
37Hz 2dB 0 2dB
+
( NORMAL ) ( NORMAL )
HIGH FREQ.
10kHz
+2dB
THX = 0 dB
0
dB
–
2dB
HIGH FREQ
0 2dB STANDBY ON
+
AUTO
ON
POWER MODE
MAINS INPUT
Owner's Manual
STANDBY ON
AUTO
ON
POWER MODE
9