Series, 160s, 160sl – dbx 160SL User Manual

Page 12: Operations, Technical, Manual, Connection, Connection installation installation, Introduction, Controls

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160S

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STEREO

COUPLE

POWER

®

160S

COMPRESSOR

LIMITER

SIDECHAIN

1.5k

4k

400

70

10

dB / Sec

RELEASE

200

400

80

10

1

dB / mSec

ATTACK

BYPASS

PEAK

PeakStopPlus

+10

+6

+4

+20

+25

OFF

dBu

STOP LEVEL

6:1

5:1

15:1

2:1

1.5:1

1:1

4:1

3:1

COMPRESSION

-20

0

+10

+20

dB

-10

OUTPUT GAIN

-40

+30

-10

0

dBu

THRESHOLD

+20

-20

+10

SIDECHAIN

1.5k

4k

400

70

10

dB / Sec

RELEASE

200

400

80

10

1

dB / mSec

ATTACK

BYPASS

PEAK

PeakStopPlus

+10

+6

+4

+20

+25

OFF

dBu

STOP LEVEL

6:1

5:1

15:1

2:1

1.5:1

1:1

4:1

3:1

COMPRESSION

-20

0

+10

+20

dB

-10

OUTPUT GAIN

-40

+30

-10

0

dBu

THRESHOLD

+20

-20

+10

DECIBELS

20 10

7 5 3

-15

-20

-10

-25

-5

-30

0

0

3

+

-

®

DECIBELS

20 10

7 5 3

-15

-20

-10

-25

-5

-30

0

0

3

+

-

®

METER SELECTION

INPUT

G.R.

OUTPUT

METER SELECTION

INPUT

G.R.

OUTPUT

Front Panel Controls

Ove rEasy

®

Switch

:

This switch activates/deactivates the OverEasy

®

characteristics of the 160SL. When the

switch is IN, the 160SL is in OverEasy mode. OverEasy is a process which allows the user to compress
a signal more gently than a hard knee compressor through the threshold region. This action produces a
much smoother “natural-sounding” compression effect. When the OverEasy switch is OUT, the regular,
hard knee action of the compressor is active. Hard knee operation can produce a much harder (hence
the nick-name “hard knee”) compression effect as the signal passes over the threshold level. Note that
when the OverEasy switch is IN, the yellow LED above the Threshold control lights whenever the
input signal level is in the OverEasy region of compression. In hard knee mode the signal is either below
the threshold and not being compressed, or it is above the threshold and is being compressed, and
therefore the yellow LED does not light. See the section entitled Operating Notes later in this manual
for a more in-depth discussion of the differences between OverEasy and hard knee compression.

Thr eshold Control

: This control adjusts the signal amplitude (volume, or level) above which compression

occurs. In OverEasy mode the threshold of compression is defined as the approximate middle of the
OverEasy region. The markings around the Threshold control are measured in dBu (where 0dBu =
.775V) and range from -40dBu (7.8mV rms) on the low end, to +30dBu (24.5V rms) at the high end of
the scale.

Thr eshold LEDs

: These LEDs (above the Threshold control) indicate the relationship between the input

signal and the threshold set by the Threshold control. The green LED lights when the input signal is
below the set threshold. The yellow LED lights when the 160SL is set in OverEasy mode via the OverEasy
switch, and the input signal level is

in the OverEasy threshold range. The red LED lights when the input

signal level is

above the set threshold. (See the section entitled Operating Notes for a discussion on the

differences between OverEasy

®

and hard knee compression.)

Com pression Control

: This control adjusts the amount of compression that is applied to the input signal

level when it exceeds the set threshold level. The amount of compression is expressed in a ratio
formula, where the first number of the ratio indicates the amount of input signal level in dB, and the
second number indicates the amount of output signal level, in dB, when the threshold is exceeded.
For example, in hard knee mode, the compression ratio of 5:1 means that for every 5dB of signal level
that exceeds the set threshold level, the resultant output signal level is 1dB. Therefore if the threshold
level is exceeded by 15dB, and the compression ratio is set to a 5:1 ratio, the output signal level will
be 3dB. In OverEasy mode, the ratio set by the Compression control is not reached until the signal
has pased through the OverEasy region of compression (the yellow LED turns off and the red LED
lights). When the ratio of ∞:1 is selected, the input signal level is “limited” to a 0dB increase in output
level, regardless of how far the set threshold level is exceeded. This occurs in both OverEasy

®

and hard

160SL

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160SL

160SL

160SL

controls

controls

160SL

notes

notes

160SL

160SL

160SL

Operations

160SL

160SL

160SL

160SL

160SL

160SL

160SL

160SL

160SL

160SL

160SL

160SL

160SL

160SL

160SL

Operations

Inspection

Inspection

Operating

Operating

Operating

Operating

Connection

Connection

Installation

Installation

Technical

Technical

Introduction

Introduction

to your system

to your system

considerations

considerations

contents

contents

concept

concept

diagram

diagram

applications

applications

support and factory service

support and factory service

160SL

Specifications

Specifications

160SL

160SL

160SL

160SL

160SL

160SL

Manual

Manual

Design

Design

Block

Block

Controls

Controls

Advanced

Advanced

Warranty

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