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Summary of Contents for Samson 131
- Page 1 31 BAND EQUALIZER...
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Page 2: 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"... -
Page 3: Table Of Contents
Introduction System Features Controls and Functions Front Panel Rear Panel Setting Up and Using the S curve 131 System Configurations About Equalization Grounding Techniques Using a Patchbay Using the S curve 131 with an RTA Using the S curve 131 to Remove Feedback... -
Page 4: Introduction
Front Of House or monitor mixers), in broadcast environments, or for recording. In this manual, you’ll find a more detailed description of the features of the S curve 131, as well as a guided tour through the front and rear panels, step-by-step instructions for using the unit, suggested applications for use with a patch bay, a Real Time Analyzer (RTA) or for ringing out monitor systems, reference appendices, and full specifications. -
Page 5: System Features
As a result, phase shifting and inter- modulation distortion is greatly reduced, making for pristine sound. • The S curve 131 can be set for either 6 or 12 dB of gain and attenuation for each of the fre- quency bands. •... -
Page 6: Controls And Functions
Range switch is not pressed in). Main Output level slider - Use this to adjust the output level of signal leaving the S curve 131 via its rear-panel output connectors (see C and D on page 5 for more information). When the main slider is at its center detented “0”... -
Page 7: Rear Panel
Range 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. -
Page 8: Setting Up And Using The S Curve 131
2. Make sure the power to all mixers and amplifiers in your audio system is off. On the front panel of the S curve 131, place the Bypass switche to it’s out (off) position and set the Main Level slider to it’s bottom-most “OFF”... - Page 9 (at which time you’ll hear a click and the audio signal will be unmuted). 8. Apply an input signal to the S curve 131 (if sending signal from a mixer output bus, drive the mixer’s output meters at approximately 0 VU). While the input signal is present, slowly raise the front panel mainlevel slider to it’s center detented “0”...
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Page 10: System Configurations
Using the S curve 131 with Passive 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 a 2-channel power amp running in mono “bridge” mode. Next, the power amplifier’s mono output is connected to the passive (non-powered) - Page 11 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 using a 1/4-inch TRS to 2 x 1/4-inch TS “Y” cable. For more information on cable wiring see the S Curve 131 Wiring Guide page 15 in this manual.
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Page 12: System Configurations
S curve 131 System Configurations Using Two S curve 131’s for Mains and Monitors... -
Page 13: About Equalization
If you are using your S curve 131 to equalize a complex mono signal (for example, the master mix out- put of a mixing console), a more natural sound can be obtained by setting up gentle “smile” curves than by simply cutting or boosting individual frequency areas. -
Page 14: Grounding Techniques
Using the S curve 131 with a Patchbay If you are using the S curve 131 with an audio patchbay (such as S patch or S patch plus), you may find it advan- tageous to connect its inputs and outputs directly to a pair of patch points. This way, you can opt to route signal to the equalizer from any source. -
Page 15: Using The S Curve 131 With An Rta
A perfectly flat frequency response is not necessarily the best sounding frequency response, so, once you have used the RTA and the S curve 131 to tune a room “by the numbers,” be sure to audition the results by playing typical audio signal (music, speech, etc.) through your system and continue to fine tune by ear. -
Page 16: Using The S Curve 131 To Remove Feedback
With power to all audio components turned off, connect the S curve 131 to the monitor mixer, preferably at its main mix inserts (if these are not available, connect the unit in-line, between the monitor mixer outputs and the monitor amplifier inputs). -
Page 17: S Curve 131 Wiring Guide
S curve 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. 1/4” TRS Insert Cable Un-Balanced 1/4” to 1/4” Cable Balanced 1/4”... -
Page 18: Specifications
Specifications 1: Center frequencies (Hz) 2: Variable range 3: Frequency response (unity) 4: THD+N, unity gain (20Hz to 20kHz) 5: Main level Max. gain 6: Low cut filter 7: Noise (with 22 kHz LPF, all faders flat) 8: Cut Only mode 9: Dimensions 10: Weight Boost... -
Page 19: Block Diagram
S curve 131 Block Diagram... - Page 20 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...