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Samson 131 - page 1
S Class Signal P r oc essors 31 BAND EQUALIZER ...
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Samson 131 - page 2
Safety Instr uctions Important Safety Instructions 1. Please read all instructions before operating the unit. 2. Keep these instructions for future reference. 3. Please heed all safety warnings. 4. Follow manufacturers instructions. 5. Do not use this unit near water or moisture. 6. Clean only with a damp cloth. 7. Do not block any of the ventilati ...
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Samson 131 - page 3
T able of Contents Introduction 2 System Features 3 Controls and Functions Front Panel 4 Rear Panel 5 Setting Up and Using the S curve 131 6 - 7 System Configurations 8 - 10 About Equalization 1 1 Grounding T echniques 12 Using a Patchbay 12 Using the S curve 131 with an RT A 13 Using the S curve 131 to Remove Feedback 14 S curve 131 Wiring Guide 1 ...
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Samson 131 - page 4
2 Congratulations on purchasing the Samson S curve 131 1/3 Octave, single channel, 31 Band Constant Q Graphic Equalizer! Although this product is designed for easy operation, we suggest you take some time out first to go through these pages so you can fully understand how we’ve implemented a number of unique features. The S curve 131 is a profess ...
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Samson 131 - page 5
3 S cur ve 131 F eatures The Samson S curve 131 Graphic Equalizer utilizes state-of-the-art, Constant Q filtering technology for precise tonal control. Here are some of it’s main features: • The S curve 131 has 31 bands of equalization, with each frequency band representing 1/3 of an octave in the 20 Hz to 20 kHz range. • Constant Q circuitry ...
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Samson 131 - page 6
4 1 Equalizer level sliders - Independent Equalizer sliders are provided for each frequency area (The S curve 131 provides 31 frequency areas).Calibration markings on either side of each Equalizer slider allow you to cut or boost each frequency area. As described below, the exact action of the Equalizer sliders depends upon the setting of the Range ...
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Samson 131 - page 7
5R a nge switch - When pressed in, the LED in the switch lights and the Equalizer sliders cut or boost each frequency area by up to 6 dB, allowing fine frequency curves to be set. When out (in the up position), the Equalizer sliders cut or boost each frequency area by up to 12 dB, allowing course control. The setting of the ± 12dB switch also affe ...
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Samson 131 - page 8
6 SETTING UP THE S cur ve 131 SETTING UP THE S cur ve 131 Setting up your S curve 131 Graphic Equalizer is a simple procedure which takes only a few minutes: 1. Remove all packing materials (save them in case of need for future service) and decide where the unit is to be physically placed—it can be used free-standing or mounted in a standard 19&q ...
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Samson 131 - page 9
SETTING UP THE S cur ve 131 7 7. Press the front panel Power switch in order to turn on the S curve 131. Press the Bypass switches in to activate the equalizer . Note that audio signal will be muted for approximately five seconds until the relay power-on circuitry is activated (at which time you’ll hear a click and the audio signal will be unmute ...
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Samson 131 - page 10
8 S cur ve 131 Sy stem Configurations Using the S curve 131 with Active Speakers In this example the mixer’s mono output is connected to the S curve 131’s input. Then, the S curve 131’s output is connected to the input of the first active (self-powered) loudspeaker. The second loudspeaker is connected to the first using the first loudspeaker? ...
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Samson 131 - page 11
S cur ve 131 Sy stem Configurations 9 Using the S curve 131 for Mains and Monitors Using the S curve 131 in Insert Points You can use the S curve 131 in your mixer’s insert points if you want to equalize a mono channel, individually in the mix. In this example the S curve 131’s Channel 1 INPUT and OUTPUT are inserted on a bass guitar channel us ...
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Samson 131 - page 12
10 S cur ve 131 Sy stem Configurations U sing T wo S curve 131’ s for Mains and Monitors In this example two S curve 131’s are used for the stereo main and for the 2-channel monitor mix. The mixer’s left and right outputs are connected to the first pair of S curve 131’s inputs for the main PA speakers. Then, the outputs are connected to the ...
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Samson 131 - page 13
11 The S curve 131 gives you fine control over shaping a sound, using a process called equalization . But there are few areas of sound engineering more misunderstood than equalization, and, just as good EQ can really help a sound, bad EQ can really hurt it, so read on... Every naturally occurring sound consists of a broad range of pitches, or frequ ...
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Samson 131 - page 14
Grounding T echniques Hum and buzz are the biggest enemies you face when interconnecting a large number of different pieces of equipment to one another. This is because each piece of equipment may operate at a marginally different voltage (this difference is called potential ) and, when two devices at slightly different potential are physically con ...
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Samson 131 - page 15
13 Using the S cur ve 131 with an RT A An RT A (Real T ime Analyzer) is a device which measures the relative levels of multiple frequency areas. This device, in conjunction with a pink noise generator , is the perfect companion for your S curve 131. T ogether with a high quality microphone, these tools allow you to fine tune the overall fre- quency ...
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Samson 131 - page 16
14 Using the S cur ve 131 to Remo ve F eedback One of the most important applications for the S curve 131 is removing feedback from an onstage monitor system. This procedure is sometimes called “ringing out,” since feedback usually begins with a slight ringing sound at the resonant frequencies where the loop between microphone and speaker is lo ...
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Samson 131 - page 17
15 S cur ve 231 Wiring Guide 2 3 1 12 3 1 3 2 2 3 1 12 3 21 3 Unbalanced 1/4” to RCA Cable Un-Balanced XLR to RCA Cable S cur ve 131 Wiring Guide There are several ways to interface the S curve 131, depending on your exact monitoring set-up. Follow the cable diagrams below for connecting your monitor system. Balanced XLR to XLR Cable Balanced 1/4 ...
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Samson 131 - page 18
16 Specifications 1: Center frequencies (Hz) 20, 25, 31.5, 40, 50, 63, 80, 100, 125, 160, 200, 250, 315, 400, 500, 630, 800, 1 k, 1.25 k, 1.6 k, 2 k, 2.5 k, 3.15 k, 4 k, 5 k, 6.3 k, 8 k, 10 k, 12.5 k, 16 k, 20 k 2: Variable range ±6 dB or ± 12 dB 3: Frequency response (unity) <10 Hz to 90 kHz ± 3 dB 4: THD+N, unity gain Less than 0.01% (20Hz ...
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Samson 131 - page 19
17 S cur ve 131 Block Diagram ...
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Samson 131 - page 20
Samson T echnologies Corp. 575 Underhill Blvd. P .O. Box 9031 Syosset, NY 1 1791-9031 Phone: 1-800-3-SAMSON (1-800-372-6766) Fax: 516-364-3888 www .samsontech.com ...
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