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Altec Lansing 1631A SIGNAL PROCESSING User Manual

Altec Lansing 1631A SIGNAL PROCESSING
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Altec Lansing 1631A SIGNAL PROCESSING Specifications

General IconGeneral
TypeElectronic Crossover
Channels2-way stereo or 3-way mono
Output Impedance600 ohms
Maximum Input Level+20 dBu
Signal to Noise Ratio>90 dB
Frequency Response20Hz - 20kHz
Power Requirements120VAC, 60Hz
Input Impedance20k ohms

Summary

DESCRIPTION

SPECIFICATIONS

Type

Describes the unit's type as a single-channel, two-way electronic dividing network.

Input Configuration

Describes single balanced or unbalanced input acceptance from various sources.

Input Impedance

Details input impedance: 15,000 ohm unbalanced and 30,000 ohm balanced.

Input Common-Mode Rejection

States input common-mode rejection of 55 dB typical from 60 Hz to 1000 Hz.

Output Configuration

Notes one unbalanced high-pass and one unbalanced low-pass output.

Output Impedance

States internal 47 ohm source impedance and 600 ohm minimum load.

Maximum Output Level

Specifies maximum output level as +20 dBm (+18 dBV).

Output Protection

Lists output protection for short circuit or +/-25VDC.

Overall Gain

States 0 dB overall gain with controls set flat.

Frequency Response

Specifies frequency response of +/- 0.5 dB from 30 Hz to 20 kHz combined.

Distortion

Details distortion: THD/IMD typically 0.02%/0.1% max.

Noise Output

States noise output of -88 dBm maximum over 20 Hz to 20 kHz bandwidth.

High/Low Channel Crosstalk

States typical high/low channel crosstalk of 60 dB.

Crossover Frequency Range

Specifies crossover frequency range from 100 Hz to 8000 Hz, set by module.

Filter Type

Details filter type as 18 dB/octave, third-order Butterworth.

Signal Delay

Describes signal delay as continuously variable from 0 msec to 2 msec.

Relative Phase

States output phase is in phase with input.

Low-Pass Output

Describes low-pass output phase relative to input with delay at minimum.

High-Pass Output

States high-pass output phase is switchable between 0 and 180 degrees.

Equalization

Details high-frequency equalization as +/- 4 dB at 10 kHz.

Low-Frequency Equalization

Describes low-frequency equalization with 6 dB peak boost.

Horn/Driver

Mentions plug-in modules for custom horn/driver equalization.

Transient Performance

States transient performance is not limited by slew rate or bandwidth.

Controls

Lists front panel controls including EQ, delay, level, polarity, and power.

Indicators

Lists indicators such as the power-on indicator.

Connections

Details input and output connection types like XLR and 1/4" phone jacks.

ARCHITECT'S AND ENGINEER'S SPECIFICATIONS

INTRODUCTION

INSTALLATION

Rack Mounting

Describes unit installation in a standard 19-inch equipment rack.

Ventilation

Specifies requirement for adequate ventilation to avoid excessive temperature rise.

SIGNAL CONNECTIONS

Input Connections

Details input connections for balanced/unbalanced sources and 600 ohm termination.

Output Connections

Describes unbalanced outputs, internal impedance, and load requirements.

Shield Connections

Provides guidelines for grounding cable shields for noise reduction.

Common Bass

Explains common bass connection for summing L/R signals for subwoofer.

OPERATION

System Integration

Explains system integration for bi-amplified or tri-amplified setups.

Unit Configuration

Outlines procedures for setting up and configuring the unit.

Adjusting The System

Provides a step-by-step guide for setting up and balancing the audio system.

Low-Frequency Signal Delay Control

Explains the low-frequency delay control for aligning acoustic centers.

High-Frequency Equalization

Details the 10 kHz EQ control for frequency boost or cut.

Low-Frequency Equalization

Describes the low-frequency boost EQ circuit for bass systems.

Polarity Reversal Switch

Describes the polarity reversal switch for high-frequency channel phase.

Custom Crossover Frequencies

Details configuring custom crossover frequencies via plug-in modules and resistors.

Module Construction

Lists items required for constructing a custom crossover frequency module.

Component Parts List

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