dbx 160A Manuel d'instructions - Page 14

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dbx 160A COMPRESSOR / LIMITER

BYPASS

1 6 0 A

CONNECTING THE 160A TO YOUR SYSTEM

Basic Connection

85-3999-A 160AD front buyoff (5-20-98)

15 WATTS

A HARMAN INTERNATIONAL

COMPANY

SALT LAKE CITY, UTAH

MADE IN USA

100V

50/60Hz

MODEL 160A

120V

60Hz

COMPRESSOR/LIMITER

85-3998-A 160AD rear buyoff (5-20-98)

The 160A has balanced inputs and outputs, and can be used with any line-level device. Some common examples include:

mixing consoles, musical instruments, patch bays and other signal processors. For more specific cabling information, refer

to Installation Considerations, page 12.

For all connections, refer to the following steps:

1. Turn Off all equipment before making any connections.

2. Mount the 160A in a 1U rack space (optional).

The 160A requires one rack space (height) and 1 rack space (width). It can be mounted above or below anything that

doesn't generate heat, since it requires no special ventilation. Ambient temperatures should not exceed 95°F (35°C)

when equipment is powered .

Note: Avoid over-tightening of rackmounting screws as this could damage the front panel.

Caution: Never remove the cover. There are no user-serviceable parts inside, and you run the risk of an electric shock.

3. Make connections via XLR or 1/4" TRS jacks according to your requirements.

Typical patch points include: a mixer's channel or subgroup inserts when using the 160A on individual instruments or

tracks; the mixer's main outputs or bus inserts when mixing; an instrument preamp's effects loop when using the 160A

for guitar or bass; main outs of a submixer (e.g., keyboard mixer) as the signal is sent to main mixer; between a DAT's

output and an analog cassette input. When using a chain of processors, the 160A may be placed either before or after

effects or dynamic processors. However, if you are using the 160A for speaker protection, the compressor should be as

close to the amplifier as possible in the signal chain. We recommend you use common sense and experiment with dif-

ferent setups to see which one provides the best results for your needs.

4. Power On the unit: Securely connect the AC power cord to the unit and mains power.

Note: Check the line voltage. The unit is shipped for 115V or 230V, 50 or 60Hz operation. Refer to the unit's rear panel to verify your unit's precise line volt-

age.

Multi-Channel (Stereo) Connections

Two channels of program material do not necessarily constitute a stereo program. A stereo program is one where the two

channels are recorded and/or mixed to create the illusion of a single unified "panorama" of sound. The stability of the psy-

choacoustic "image" of each sound source within the stereo program depends upon its ability to maintain a specific phase

and amplitude relationship from left to right channel .

If two independent compressors are used to process the stereo program, a loud sound occurring in one channel will cause

the image to shift to the opposite side. This can be avoided by linking the two compressors in such a way that both chan-

nels receive the same amount of compression.

Stereo operation between two 160As can be accomplished by first "strapping" the two unit's together, i.e., by connecting

the rear panel STEREO STRAPPING jacks of each unit with a 1/4" TRS phone cable. Then, designate one of the two units

to be a "Master" (SLAVE button Out) and switch the other unit to "Slave" mode (SLAVE button In, SLAVE LED On).

The Master 160A will now respond to the combined inputs of the 160As. The Master's controls will adjust the amount and

nature of the compression and the Slave will track accurately to preserve proper stereo imaging.

Note: Remove the strapping cable if you want to use two 160As independently. When the SLAVE buttons on two strapped units are not depressed, the

160As do not operate independently because the "ring" of the strapping cable still sums the audio of each unit. The strapping cable must be removed for

proper single-channel operation. If both SLAVE buttons are depressed, both units will be bypassed (i.e., fixed at unity gain).

Note: A 160A unit cannot be strapped with a dbx 160XT, 160X, 160, 161 or 162 unit.

-10

3:1

-20

BELOW

ABOVE

2:1

SLAVE

OVEREASY

-30

+10

-40dBu

+20dBu

1:1

THRESHOLD

MANUFACTURED UNDER ONE OR MORE OF THE FOLLOWING U.S. PATENTS 4,234,804 4,316,107 4,329,598 4,331,931 4,377,792 4,403,199 4,409,500 4,425,551 4,434,380 4,454,433 4,471,324 4,473,793 OTHER PATENTS PENDING

INPUTS

BAL / UNBAL

4:1

6:1

INPUT

10:1

-10

+10

OUTPUT

-40

-5:1

-2:1

-1:1

-20dB

+20dB

C O M P R E S S O R / L I M I T E R

COMPRESSION

OUTPUT

RATIO

GAIN

DISPLAY

OUTPUTS

UNBALANCED

XLR

GND

LIFT

BALANCED

LIFT

LEVEL

20+

GAIN REDUCTION

DETECTOR

METER

STEREO

XLR:

INPUT

CALIBRATION

STRAPPING

PIN 1

PIN 2

PHONE:

PIN 3

TIP

PHONE:

SLEEVE

TIP

RING

SLEEVE

TRS 160A ONLY