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S Class Signal Processors
25 40 63 100 160 250 400 630 1K 1.6K 2.5K 4K 6.3K 10K 16K CH 1 25 40 63 100 160 250 400 630 1K 1.6K 2.5K 4K 6.3K 10K 16K CH 2
-30 -18 -6 0 +6 +18 -30 -18 -6 0 +6 +18
POWER
12 12 6 LOW CUT 12 12 6 LOW CUT
6 6 3 6 6 3
0 0 0 0 0 0
DUAL 15 BAND
BYPASS BYPASS
6 6 -20 6 6 -20
EQUALIZER
12 12 OFF 12 12 OFF
25 40 63 100 160 250 400 630 1K 1.6K 2.5K 4K 6.3K 10K 16K CH 1 25 40 63 100 160 250 400 630 1K 1.6K 2.5K 4K 6.3K 10K 16K CH 2
DUAL 15 BAND EQUALIZER
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Safety Instructions Caution: To reduce the hazard of electrical shock, do not remove cover or back. No user serviceable parts inside. Please refer all servic- ing to qualified personnel. WARNING: To reduce the risk of fire or electric shock, do not expose this unit to rain or moisture. The lightning flash with an arrowhead symbol within an equilateral triangle, is intended to alert the user to the presence of uninsulated "dangerous voltage" within the products enclosure that may be of suffici
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Table of Contents Introduction 2 System Features 3 Controls and Functions Front Panel 4 Rear Panel 5 Setting Up and Using the S curve 215 6 - 7 System Configurations 8 - 10 About Equalization 11 Grounding Techniques 12 Using a Patchbay 12 Using the S curve 215 with an RTA 13 Using the S curve 215 to “Ring Out” a Monitor System 14 S curve 215 Wiring Guide 15 Specifications 16 Pass-Band Graphs 16 Block Diagram 17 Copyright 2003, Samson Technologies Corp. Printed June., 2003 Samson Technol
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Introduction Congratulations on purchasing the Samson S curve 215 2/3 Octave, Stereo, 15 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 215 is a professional quality signal processor that gives you precise tonal control over two channels of audio. Center detented sliders with LED illumination allow
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S curve 215 Features 25 40 63 100 160 250 400 630 1K 1.6K 2.5K 4K 6.3K 10K 16K 25 40 63 100 160 250 400 630 1K 1.6K 2.5K 4K 6.3K 10K 16K CH 1 CH 2 -30 -18 -6 0 +6 +18 -30 -18 -6 0 +6 +18 POWER 12 12 6 LOW CUT 12 12 6 LOW CUT 6 6 3 6 6 3 0 0 0 0 0 0 DUAL 15 BAND BYPASS BYPASS 6 6 -20 6 6 -20 EQUALIZER 12 12 OFF 12 12 OFF 25 40 63 100 160 250 400 630 1K 1.6K 2.5K 4K 6.3K 10K 16K CH 1 25 40 63 100 160 250 400 630 1K 1.6K 2.5K 4K 6.3K 10K 16K CH 2 The Samson S curve 215 Graphic Equalizer utilizes st
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Controls and Functions FRONT PANEL LAYOUT 1 2 3 4 1 2 3 4 6 25 40 63 100 160 250 400 630 1K 1.6K 2.5K 4K 6.3K 10K 16K CH 1 25 40 63 100 160 250 400 630 1K 1.6K 2.5K 4K 6.3K 10K 16K CH 2 -30 -18 -6 0 +6 +18 -30 -18 -6 0 +6 +18 POWER 12 12 6 12 12 6 LOW CUT LOW CUT 6 6 3 6 6 3 0 0 0 0 0 0 DUAL 15 BAND BYPASS BYPASS 6 6 -20 6 6 -20 EQUALIZER 12 12 OFF 12 12 OFF 25 40 63 100 160 250 400 630 1K 1.6K 2.5K 4K 6.3K 10K 16K CH 1 25 40 63 100 160 250 400 630 1K 1.6K 2.5K 4K 6.3K 10K 16K CH 2 5 5 1 Equaliz
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Controls and Functions REAR PANEL LAYOUT A AC input - Connect the supplied heavy gauge 3-pin “IEC” power cable here. B Balanced XLR jack input - Electronically balanced XLR jack input. Wiring is as follows: pin 2 hot, pin 3 cold, and pin 1 ground. C Balanced XLRjack output - Electronically balanced XLR jack output. Wiring is as fol- lows: pin 2 hot, pin 3 cold, and pin 1 ground. D Balanced 1/4" TRS jack input - Electronically balanced 1/4" TRS jack input. Wiring is as follows: tip hot, ri
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SETTING UP THE S curve 215 SETTING UP THE S curve 215 Setting up your S curve 215 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" rack (The S curve 215 requires only a single rack space). 2. Make sure the power to all mixers and amplifiers in your audio system is off. On the front
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SETTING UP THE S curve 215 7. Press the front panel Power switch in order to turn on the S curve 215. 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 unmuted). 8. Apply an input signal to the S curve 215 (if sending signal from a mixer output bus, drive the mixer’s output meters at approximately 0 VU). W
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S curve 215 System Configurations Using the S curve 215 with Active Speakers In this example the mixer’s left and right outputs are connected to the S curve 215’s Channel 1 and Channel 2 inputs. Then, the S curve 215’s Channel 1 and Channel 2 outputs are connected to the inputs of the active (self-powered) loudspeakers. Using the S curve 215 with Passive Speakers In this example the mixer’s left and right outputs are connected to the S curve 215’s Channel 1 and Channel 2 inputs. Then, the S cu
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S curve 215 System Configurations Using the S curve 215 in Insert Points You can use the S curve 215 in your mixer’s insert points if you want to equalize one stereo, or two mono channels, individually in the mix. In this example, the S curve 215’s Channel 1 INPUT and OUTPUT are inserted on a piano channel using a 1/4-inch TRS to 2 x 1/4-inch TS “Y” cable. The S curve 215’s Channel 2 INPUT and OUTPUT are connected to the bass guitar channel using the same type of insert cable. For more informa
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S curve 215 System Configurations Using Two S curve 215’s for Mains and Monitors 10 In this example, two S curve 215’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 215’s Channel 1 and Channel 2 inputs for the main PA speakers. Then, the first S curves 215’s Channel 1 and Channel 2 outputs are connected to the inputs of the power amplifier for the main speakers. For the monitor mix, the mixer’s AUX1 and AUX
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About Equalization The S curve 215 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 frequencies, combined togeth- er in a unique way. This blend is what gives every sound its distinctive tonal color. The range of fre- q
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Grounding Techniques 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 connected with audio cabling, the end result can be nasty, extraneous noise (mind you, connecting two devices at very dif- ferent potential can result in
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Using the S curve 215 with an RTA An RTA (Real Time 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 215. Together with a high quality microphone, these tools allow you to fine tune the overall fre- quency response of your audio system in any given environment (this procedure is sometimes known as “tuning” a room). To use this kind of system, connect the S cu
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Using the S curve 215 to Remove Feedback One of the most important applications for the S curve 215 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 loudest. The advanced Constant Q circuitry used by both models ensures that adjacent program frequencies which may not be causing any prob- lems are unaffected e
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S curve 231 Wiring Guide S curve 215 Wiring Guide There are several ways to interface the S curve 215, depending on your exact monitoring set-up. Follow the cable diagrams below for connecting your monitor system. 1/4” TRS Insert Cable Return Send Send Send Return Send Return Return Un-Balanced 1/4” to 1/4” Cable Signal Signal Signal Tip (signal) Signal Tip (signal) Ground Ground Ground Ground Sleeve (ground) Sleeve (ground) Balanced 1/4” to 1/4” Cable Signal (ring) Signal (ring) Signal (ring) T
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Specifications Center frequencies (Hz) 25, 40, 63, 100, 160, 250, 400, 630, 1 k, 1.6 k, 2.5 k, 4 k, 6.3 k, 10 k, 16 k Variable range ±12 dB Frequency response (unity) <10 Hz to 90 kHz ±3 dB THD+N, unity gain Less than 0.01% (20Hz to 20kHz) Max. Output Level gain +6 dB High pass filter 80 Hz (18 dB/ oct) Noise (with 20 kHz LPF, all faders flat) -85 dB Dimensions 19 in. (w) x 10.5 (d) x 1.75 (h) 482 mm (w) x 267 (d) x 44 (h) Weight 6.1 lb.; 2.8 kg Boost +12 +10 +5 0 -5 -10 -12 Cut 100 1K 20 50 20
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S curve 215 Block Diagram 17
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Samson Technologies Corp. 575 Underhill Blvd. P.O. Box 9031 Syosset, NY 11791-9031 Phone: 1-800-3-SAMSON (1-800-372-6766) Fax: 516-364-3888 www.samsontech.com
