Document Outline

• The Channel Strip
• Table of Contents
• 1.0 Overview
  • 1.1 The Channel Strip Features and Introduction
• 2.0 Signal Flow and Block Diagrams
  • 2.1 Default Signal Flow
  • 2.2 Alternate Routing
    • 2.2.1 Compressor Post EQ
    • 2.2.2 Compressor Bypass
    • 2.2.3 Equalizer Bypass
    • 2.2.4 Insert
  • 2.3 Default Signal Flow Block Diagram
  • 2.4 Compressor Post EQ Block Diagram
  • 2.5 512C Preamp Block Diagram
  • 2.6 325 Output Section Block Diagram
  • 2.7 Rear Panel Signal Flow
• 3.0 Input Section: 512C Microphone/Instrument/Line Preamplifier
  • 3.1 512C Preamp Overview and Feature
  • 3.2 Preamp Controls
  • 3.3 Input Selection
    • 3.3.1 Input Switch
    • 3.3.2 Microphone Input
    • 3.3.3 Instrument Input
    • 3.3.4 Line Input
  • 3.4 Polarity Inverter
  • 3.5 Level Indication
    • 3.5.1 VU Meter
    • 3.5.2 Peak Indicator
  • 3.6 Preamp Output
  • 3.7 512C Preamp Block Diagram
• 4.0 Dynamic Processing: 527 Compressor
  • 4.1 527 Compressor Overview and Features
  • 4.2 Compressor Controls
    • 4.2.1 Threshold
    • 4.2.2 Attack and Release
    • 4.2.3 Ratio
    • 4.2.4 Compression Type
      • 4.2.4.1 OLD: Feed-Back Compression
      • 4.2.4.2 NEW: Feed-Forward Compression
    • 4.2.5 Knee
      • 4.2.5.1 Soft Knee Compression
      • 4.2.5.2 Hard Knee Compression
    • 4.2.6 THRUST®
    • 4.2.7 Gain Reduction Meter
  • 4.3 Compressor Routing
    • 4.3.1 Compressor Pre Equalizer (Default Signal Flow)
    • 4.3.2 Compressor Post Equalizer
    • 4.3.3 Compressor Bypass
    • 4.3.4 Compressor Side Chain
  • 4.4 DC Link
  • 4.5 Side Chain Input
• 5.0 Spectral Processing: 550A Equalizer
  • 5.1 550A Equalizer Overview and Features
  • 5.2 Equalizer Controls
    • 5.2.1 Low Frequency Band
    • 5.2.2 Mid Frequency Band
    • 5.2.3 High Frequency Band
    • 5.2.4 Band-Pass Filter
  • 5.3 Equalizer Routing
    • 5.3.1 Equalizer Post Compressor (Default Signal Flow)
    • 5.3.2 Equalizer Pre Compressor
    • 5.3.3 Equalizer Bypass
      • 5.3.3.1 EQ Bypass
      • 5.3.3.2 EQ IN Switch
• 6.0 Output Section: 325 Line-Driver
  • 6.1 325 Output Section Overview and Features
  • 6.2 Output Section Controls
    • 6.2.1 Output
    • 6.2.2 Soft Mute
      • 6.2.2.1 Remote Mute Control
    • 6.2.3 VU Meter
  • 6.3 Output Section Routing
    • 6.3.1 Insert
  • 6.4 325 Output Section Block Diagram
• 7.0 Rear Panel Interface
  • 7.1 Audio Path Inputs
  • 7.2 Audio Path Outputs
  • 7.3 Rear Panel Half-Normals
  • 7.4 527 Compressor Side Chain and DC Link Connections
    • 7.4.1 Side Chain Input
    • 7.4.2 DC Link
  • 7.5 Remote Mute Control
  • 7.6 Rear Panel Signal Flow
• 8.0 AC Power
• APPENDIX
  • i. 512C Preamplifier Specifications
  • ii. 527 Compressor Specifications
  • iii. 550A Equalizer Specifications
  • iv. 325 Line-Driver Specifications