2

BAND

WIDTH

OCTAVES

31

12

U

LO

MID

–15 +15 250

220350 FREQ

453k

U

HI

12k

–15 +15

U

LO

80

–15 +15

EQ

EQ IN

75 Hz 18dB/oct

LOW CUT

PAN

Now you know some of the design philosophy behind our Hi Mid EQ. It’s time to start experimenting with it yourself. Don’t forget to try the control at its bandwidth extremes — especially at the 3-octave end. You’ll be pleasantly surprised.

Conversely, if you hate technology and yearn for the sound of that old board you sold to buy an 8•Bus, you can achieve a semi- parametric sound by leaving the BANDWIDTH knob in the middle at 2 octaves.

LO MID EQ

+15

+10

+5

0

–5

–10

–15 20Hz

+15

+10

+5

0

–5

–10

–15

100Hz

1kHz

10kHz 20kHz

Lo Mid EQ

2 octave ±15dB boost/cut

available. It’s a fine bass control, and is switched with HI EQ into the MIX-B circuit if the SPLIT button is depressed.

A low-frequency shelving equalizer will add or remove bass in a smooth, musical fashion. Good for working on bass drum and bass guitar, fattening up (or thinning out) a piano or contouring an entire mix.

EQ IN/OUT

The IN switch (22) bypasses the EQ (though not the LO CUT filter) when up. Depress it to enable equal- ization.

LR

U

LEVEL

OO +15

 

HI/LO EQ

 

TO MIX-B

 

MIX-B

 

MONITOR

SPLIT EQ

 

FLIP SW

CHANNEL

SOURCE

The LO MID EQ control (19) is a semi-parametric (sweepable) equalizer with a broad, fixed bandwidth of 2 octaves, ±15dB of equalization and frequency variable from 45Hz to 3kHz.

Boosting in this range can put warmth and body into vocals and instruments. Cutting can really help the clarity of some sounds by reducing boxy and boomy tones.

HI EQ

The HI EQ control (20) is a fixed 12kHz shelving equalizer with ±15dB of equalization available. A great treble control, it is switched with LO EQ into the MIX-B circuit if the SPLIT button is depressed.

Shelving equalizers work on a very broad range of frequencies, and consequently, are very musi- cal. In a 12kHz shelf like this section, that means that all the upper harmonics of a sound are raised evenly, basically keeping their original musical relationship to each other. A high-frequency shelving EQ is great for putting shimmer into acoustic guitar and piano tracks and sizzle into vocals.

LO EQ

The LO EQ control (20) is a fixed 80Hz shelving equalizer with ±15dB of equalization

20Hz

+15

+10

+5

0

–5

–10

–15 20Hz

+15

+10

+5

0

–5

–10

–15 20Hz

+15

+10

+5

0

–5

–10

–15 20Hz

+15

+10

+5

0

–5

–10

–15 20Hz

 

 

100Hz

 

 

 

 

 

 

1kHz

10kHz 20kHz

 

 

 

 

Lo Mid EQ sweeps

 

 

 

LO CUT

 

 

 

from 45Hz to 3kHz

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The LO CUT switch (23) inserts

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

an 18dB/octave low-cut (high-pass)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

filter with a –3dB point of 75Hz into

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

the main channel signal. The LO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CUT filter is unaffected by the EQ IN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

switch.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A low-cut filter is handy to get rid

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

of room rumble, traffic noise, wind

 

 

100Hz

 

 

 

 

 

 

1kHz

10kHz 20kHz

noise, popping, and other unwanted

Hi EQ ±15dB boost/cut

 

 

 

 

 

 

 

above 12kHz

 

 

 

very-low-frequency sounds. It can

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

also be combined with LO EQ boosts

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

to produce some interesting bass

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

curves as shown in the last EQ

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

graph on this page. It is highly rec-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ommended that this switch be

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

engaged for vocal microphones, es-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

pecially in a live P. A. situation.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AUX SENDS

 

 

100Hz

 

 

 

 

 

 

1k

Hz

10kHz 20kHz

Lo EQ ±15dB boost/cut

 

 

 

 

 

 

 

 

 

below 80Hz

 

 

 

Auxiliary sends are generally used

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

to provide mixes for headphone cue-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ing and for effects sends, and in

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Sound Reinforcement use, can be as-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

signed monitor submix duties. The

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8•Bus Series consoles provide 6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

mono auxiliary sends with several

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

routing options.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Note: All of the 8•Bus Series AUX

 

 

100Hz

 

 

 

 

 

 

1k

Hz

10kHz 20kHz

Lo cut (high pass filter)

 

 

 

sends have a very wide range of gain

 

 

 

18dB/oct. at 75hz

 

 

 

(just like the MIX-B Level control

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

discussed earlier). The first half of

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

the control’s rotation reaches from

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

the off position to unity gain (U).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This half of the control’s range corre-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

sponds to the full range of a

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

conventional mixer. The second half

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

of the control’s rotation provides you

 

 

100Hz

 

 

 

 

 

 

1kHz

10kHz 20kHz

 

8

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