B&K Two Channel Amplifier EX4420 User Manual

Holds the AC Line fuse.

For attaching the supplied AC power cord.

For connecting the speakers to the amplifier.

For connecting balanced signal patch cables (XLR).

For connecting signal patch cables (interconnects).

Option for adjusting the input level to the amplifier.

To provide remote switching of mute on/off.

Describes the AC fuse holder and its 12 Amp Slow Blow fuse.

Describes the AC input receptacle for the power cord.

Describes the speaker outputs for connecting speakers.

Describes the balanced inputs for XLR cables.

Describes the RCA inputs for interconnects.

Details the optional level controls for input adjustment.

Explains the input/output for remote muting.

Explains how to use and adjust level controls.

Accepts line input from preamplifier's unbalanced output connectors.

Accepts line input from preamplifier's balanced output connectors.

Details the pinout for balanced XLR connectors (GND, -, +).

Five-way binding posts for speaker connections.

Explains proper connection of red (+) and black (-) posts to speakers.

Advises on the correct order for turning equipment on and off.

Explains how the control output allows remote switching of mute on/off.

Describes connecting multiple amplifiers using CTRL OUT to CTRL IN.

Details the required voltage range (5-24 VDC) for control signals.

Requirements for enabling the control function and button positions.

Details output status (Sound/Mute) based on control signals.

Specifies power output at 8 and 4 ohms.

Defines the amplifier's frequency range.

Specifies the required input voltage for rated output.

Total Harmonic Distortion plus Noise measurement.

Electrical impedance of the input.

Measure of amplifier's control over speaker movement.

Maximum current the amplifier can deliver.

Speed at which the amplifier's output voltage changes.

Additional power available for transient peaks.

Signal-to-noise ratio, A-weighted.

Amplification factor in terms of voltage.

Available operating voltages (120/220/240 VAC).

Overall physical dimensions of the unit.

The physical weight of the amplifier.

Maximum power drawn during operation and idle.

Specifies the types and ratings for replacement fuses.

Diagnoses issues when there is no sound and the 'on' LED is off.

Diagnoses issues when sound is missing from some or all channels.

Troubleshoots issues related to poor sound direction or weak bass.

Identifies causes for humming or buzzing sounds.

Addresses problems with reduced audio output levels.

Diagnoses distorted sound and low output on channels.