QSC Audio KW152, KW181, KW153, KW122 user manual Channel a, Channel B, Balanced Inputs

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Channel A

 

Channel A accepts either microphone or line level inputs. The MIC/LINE IN A inputs can use either a:

 

• Male XLR connector, or a

 

• Male 1/4" phone jack (TS or TRS type).

 

The KW122, KW152, and KW153 feature a 4-position rotary switch (MIC/LINE GAIN) to provide input gain flexibility.

 

• 0 dB – Regular line level, no additional gain.

 

• 12 dB – Pre-amp is engaged, primarily for low line levels that need extra gain.

 

• 24 dB – Pre-amp is engaged and MIC LED illuminates. For direct microphone use.

 

• 36 dB – Pre-amp is engaged and MIC LED illuminates. For microphones with lower output levels that need extra gain.

 

EN

 

The Mic settings (24 and 36 dB) should only be used if a microphone is connected directly to the MIC/LINE IN A. Using the Mic settings for other

 

purposes may introduce distortion. It is recommended that you move the GAIN A knob to the OFF position, or power down the loudspeaker, before

 

changing the MIC/LINE GAIN switch. If you change the switch while audio is being processed there will be very noticeable changes in the output level.

 

The gain for signal delivered on Channel A is set using the GAIN A knob. This control sets the sensitivity of Channel A, as well as the amount of signal

 

sent to the power amplifier and, in turn, to the loudspeaker components. It also sets the amount of signal sent to the LINE OUT (POST-GAIN MIX).

 

The green SIGNAL LED illuminates when a signal is present, regardless of the amount of gain set by the GAIN knob. If the LED does not illuminate,

 

the input is not receiving any signal or the level of the signal is too low; check all connections and the status of the device delivering the signal.

 

Channel B

 

Channel B accepts line level input only. The Line Level inputs can use either a:

 

Male XLR connector, a

Male 1/4" phone jack (TS or TRS type), or a

Mono or stereo line level input on a pair of RCA (phono) jacks. Stereo input received at the RCA input jacks is summed to mono, and is not passed to the discrete outputs.

The gain for signal delivered on Channel B is set using the GAIN B knob. This control sets the sensitivity of Channel B, as well as the amount of signal sent to the power amplifier and, in turn, to the loudspeaker components. It also sets the amount of signal sent to the LINE OUT (POST-GAIN MIX). The green SIGNAL LED illuminates when a signal is present, regardless of the amount of gain set by the GAIN knob. If the LED does not illuminate, the input is not receiving any signal or the level of the signal is significantly low; check all connections and the status of the device delivering the signal.

Note: Unless the gain controls associated with all active inputs are set to 0 dB, the output signal from the LINE OUT (POST-GAIN MIX) will not be at the same level as the input signal. If a “slave” speaker is intended to playback at the same level as the “master” speaker, the gain control on the “slave” speaker should be set to 0 dB.

Balanced Inputs

Connect to the plug as shown.

1

= Shield (ground)

Ground

2

= Plus (+)

Inverting Input

3

= Minus (-)

+ Non-inverting Input

Balanced Inputs XLR Connector

 

Balanced Inputs ¼" Phone Jack Connector

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Contents KW Series Maintenance servicing instructions in this manual Shock to humansQSC Audio Products 3 Year Limited Warranty FCC StatementPackage Contents FeaturesKW152 15, 2-Way Loudspeaker System KW153 15, 3-Way Loudspeaker System KW181- Single 18 Subwoofer Applications Pole screws into the socket for a secure fitInstallation Recommended DeploymentNever exceed the rating of the hardware or equipment AC Mains System Power Sequencing Input ConnectionsAlways follow the rule speakers are last on, first off Channel a Channel BBalanced Inputs Green Signal LED Unbalanced InputsOutput Connections Channel a Gain Knob Channel B Gain KnobKW181 DSP Features DSP User FunctionsProprietary DSP Functions Low-frequency EQHigh-frequency EQ Subwoofer PolarityAdditional Features StandbyFront LED Functions Rear Limit LEDSchematics of Proper Wiring for Remote Gain Attenuator Wiring to the 3 pin Euro connectorRemote Gain Attenuator Occur. Do not connect +5V pin 1 directly to pin 3, groundInput Hookup Output Hookup Output Hookup Common Standalone Small System Mono Common Stereo System Dimensions KW153 Dimensions KW153 Cover KW M10 KIT KW181 Cover Mailing Address Telephone NumbersFacsimile Numbers World Wide Web