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API 2500 User Manual

API 2500
33 pages
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2500 Stereo Bus Compressor
50
th
Anniversary Edition
OPERATOR’S MANUAL
Written for Automated Processes Incorporated
by Dan Pfeifer
Rev. 19-07-18

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API 2500 Specifications

General IconGeneral
TypeStereo Bus Compressor
Number of Channels2
MeteringGain Reduction, Output Level
SidechainYes
Attack Time0.03 ms to 30 ms
Ratio1.5:1 to Infinity:1
Form FactorRackmount
Rack Spaces1U
Noise-90 dBu
ControlsThreshold, Ratio, Attack, Release, Makeup Gain, Type
Power50/60 Hz
Dimensions19"
Threshold-20 dB to +10 dB
Release Time0.05 sec to 3 sec
InputsXLR
OutputsXLR
Frequency Response10Hz to 20kHz ± 0.5dB
Sidechain FilterYes, High-Pass Filter
CompressionFeed-Forward / Feed-Back (selectable)

Summary

Important Safety Instructions

Hearing Loss Warning

Warning about potential permanent hearing loss from high noise levels.

Environmental Hazard Warning

Warning against exposing the apparatus to rain or moisture.

2.0 Quick Start Guide

4.0 Compressor Section

Attack and Release Controls

Details on setting attack times and fixed release times for compression.

4.1.1 Threshold Control

Sets the compression threshold level and explains the threshold LED indicator.

4.1.2 Attack Time

Explains how to set attack times and lists fixed attack time values.

4.1.3 Ratio Settings

Defines ratio settings and their effect on compression and limiting.

4.1.4 Release Time

Explains how to set release times, both fixed and variable.

5.0 Tone Section

6.0 Link Section

7.0 Output Section

7.1.1 Make-up Gain

Explains manual and auto make-up gain controls.

7.1.2 Blend and Mix

Details BLEND and MIX controls for parallel compression and output blending.

9.0 Side Chain Input

10.0 Power and Rear Panel Connections

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