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Dear Customer, Welcome to the team of DENOISER users and thank you very much for expressing your confidence in BEHRINGER products by purchasing the SNR2000. It is one of my most pleasant tasks to write this letter to you, because it is the culmination of many months of hard work delivered by our engineering team to reach a very ambitious goal: making an outstanding device that will become a standard tool used by studios and P.A. companies. The task to design the DENOISER certainly meant a great deal of responsibility, which we assumed by focusing on you, the discerning user and musician. It also meant a lot of work and night shifts to accomplish this goal. But it was fun, too. Developing a product usually brings a lot of people together, and what a great feeling it is when everybody who participated in such a project can be proud of what weve achieved. It is our philosophy to share our joy with you, because you are the most important member of the BEHRINGER family. With your highly competent suggestions for new products youve greatly contributed to shaping our company and making it successful. In return, we guarantee you uncompromising quality (manufactured under ISO9000 certified management system) as well as excellent technical and audio properties at an extremely affordable price. All of this will enable you to fully unfold your creativity without being hampered by budget constraints. We are often asked how we are able to produce such high-grade devices at such unbelievably low prices. The answer is quite simple: its you, our customers! Many satisfied customers mean large sales volumes enabling us to get better conditions of purchase for components, etc. Isnt it only fair to pass this benefit back to you? Because we know that your success is our success too! I would like to thank all people whose help on Project DENOISER has made it all possible. Everybody has made very personal contributions, starting from the designers of the unit via the many staff members in our company to you, the user of BEHRINGER products. My friends, its been worth the trouble! Thank you very much, Uli Behringer

TABLE OF CONTENTS 1. INTRODUCTION 1.1 The design concept 1.2 Before you begin 1.3 Control elements 1.3.1 Front panel 1.3.2 Rear panel 2. OPERATION 2.1 Operation of the filter section 2.1.1 The masking effect 2.1.2 The dynamic low-pass filter 2.2 The TAC filter of the DENOISER 2.2.1 SENSITIVITY control 2.2.2 CUT OFF control 2.2.3 RELEASE control 2.2.4 AUTO switch 2.2.5 FREQUENCY meter 2.3 Operation of the expander section 2.4 The IRC expander of the DENOISER 2.4.1 THRESHOLD control 2.4.2 RELEASE control 2.4.3 RATIO control 2.4.4 GAIN REDUCTION meter 2.5 The COUPLE function 3. APPLICATIONS 3.1 Initial settings of the DENOISER 3.2 Studio applications 3.2.1 Noise reduction during playback 3.2.2 Noise reduction during recording 3.2.3 Reducing noise on subgroups, monitor and effects buses 3.2.4 Noise reduction for effects devices 3.2.5 Noise reduction during tape duplication 3.2.6 Noise reduction for instruments 3.2.7 Reducing noise in P.A. systems 3.2.8 Noise reduction in Hi-Fi and video applications 4. TECHNICAL BACKGROUND 4.1 What are audio dynamics? 4.2 Compressors/limiters 4.3 Expanders/noise gates 4.4 Downward expansion 4.5 Noise as physical phenomenon 4.6 Companders 4.7 The single-ended principle 5. INSTALLATION 5.1 Rack mounting 5.2 Audio connections 6. SPECIFICATIONS 7. WARRANTY

DENOISERSNR2000 Version 2.3 June 2002 Users Manual www.behringer.com ENGLISH