Samson S.curve 231 manual

DUAL 31 BAND EQUALIZER S Class Signal P r oc essors[...]

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[...]

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 231 6 - 7 System Configurations 8 - 10 About Equalization 1 1 Grounding T echniques 12 Using a Patchbay 12 Using the S curve 231 with an RT A 13 Using the S curve 231 to Remove Feedback 14 S curve 231 Wiring Guide 1[...]

2 Congratulations on purchasing the Samson S curve 231 dual channel,1/3 Octave, 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 231 is a profession[...]

3 S cur ve 231 F eatures The Samson S curve 231 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 231 is a two channel equalizer and each channel provides 31 bands of equaliza- tion, with each frequency band representing 1/3 of an octave in [...]

4 1 Equalizer level sliders - Independent Equalizer sliders are provided for each frequency area (The S curve 231 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[...]

5 CUT ONLY switch - When pressed in, the LED switch lights and all the Equalizer sliders serve to attenuate their frequency areas only (there is no boost) by up to 6 or 12 dB, depending upon the setting of the RANGE switch (see #7 below). The Cut Only switch should be used when you need to notch out certain frequencies in order to reduce feedback o[...]

6 SETTING UP THE S cur ve 231 SETTING UP THE S cur ve 231 Setting up your S curve 231 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[...]

SETTING UP THE S cur ve 231 7 7. Press the front panel Power switch to turn on the S curve 231. Press the Equalizer 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 unmut- ed). [...]

8 S cur ve 131 Sy stem Configurations Using the S curve 231 with Active Speakers In this example, the mixer’s stereo output is connected to the S curve 231’s inputs. Then, the S curve 231’s outputs are connected to the inputs of each active (self-powered) loudspeaker. Using the S curve 231 with Passive Speakers In this example the mixer’s s[...]

S cur ve 131 Sy stem Configurations 9 Using the S curve 231 for Mains and Monitors Using the S curve 231 in Insert Points You can use the S curve 231 in your mixer’s insert points if you want to equalize two mono channels individually in the mix. In this example the S curve 231’s Channel 1 INPUT and OUTPUT are inserted on a bass guitar channel [...]

10 S cur ve 131 Sy stem Configurations U sing T wo S curve 231’ s for Mains and Monitors In this example, two S curve 231’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 S curve 231’s inputs for the main PA speakers. Then, the outputs are connected to the inputs[...]

11 The S curve 231 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[...]

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[...]

13 Using the S cur ve 231 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 231. T ogether with a high quality microphone, these tools allow you to fine tune the overall fre- quency[...]

14 Using the S cur ve 231 to Remo ve F eedback One of the most important applications for the S curve 231 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[...]

15 S cur ve 231 Wiring Guide Unbalanced 1/4” to RCA Cable S cur ve 231 Wiring Guide There are several ways to interface the S curve 231, 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” to 1/4” Cable Un-Balanced 1/4” to 1/4” Cable 1/4” [...]

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 70 kHz -3 dB 4: THD+N, unity gain Less than 0.013% (20Hz t[...]

17 S cur ve 231 Block Diagram[...]

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[...]