Graphic Equalizer User Guide and Reference Manual EQA215 EQA131 EQA231
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TABLE OF CONTENTS Precautions ………………………………………………………………………………………………i Table of Contents ………………………………………………………………………………………1 General Description …………………………………………………………………………………2-3 Features …………………………………………………………………………………………………2 Controls/Connections ………………………………………………………………………………3-5 Specifications …………………………………………………………………………………………6 Service …………………………………………………………………………………………………7 Maintenance ……………………………………………………………………………………………7 Warranty Information …………………………………………………………………………………7 Congratulations on your purchase
GENERAL DESCRIPTION EQA231 is a two channel 31 band 1/3 octave graphic equalizer. The EQA231 incorporates Constant-Q circuitry with a 5% center frequency accuracy. Special features include variable Low and High pass filters, selectable range ±6dB or ±12dB, balanced and unbalanced input/output connectors, RFI filters, variable level control, passive bypass switch, PEAK LED, ground lift switch. EQA131 is a single channel 31 band 1/3 octave graphic equalizer.
GENERAL DESCRIPTION The EQA231, EQA131 and EQA215 all offer the same high quality Constant-Q performance. Constant-Q graphic equalizers were developed to fill the sound professional’s need for greater control over sound shaping with less interaction between sliders. Truth in slider position became a requirement. The curve traced out by the slider positions on Constant-Q designs indeed represent the actual change to the frequency response. On conventional designs they do not.
FRONT AND REAR PANELS EQA215 EQA131 1. Power Switch 8. Bypass Indicator 2. Filter Level Controls 9. Peak Indicator 3. Filter Range Switch & Indicators 10. Input & Output Connectors 4. Bypass Switch 11. Voltage selector 5. HPF Frequency Control 12. Ground-Lift Switch 6. LPF Frequency Control 13. Socket with fuse holder 7.
FRONT AND REAR PANEL CONTROLS 1. Power Switch This switch is pressed to turn power ON, pressing the switch again turns the power off. Always turn on your equalizer BEFORE your power amplifiers are turned on, and always turn off equalizer AFTER your power amplifiers have been turned off. 2. Filter Level Controls Each of these sliders control the output level of each of the 31 (or 15) bandpass filters. Center detent position is grounded for guaranteed flat response. 3.
Specifications Equalizer: EQA231 ……………………………1/3-Octave ISO Spacing From 20Hz to 20KHz EQA131 ……………………………1/3-Octave ISO Spacing From 20Hz to 20KHz EQA215 ……………………………2/3-Octave ISO Spacing From 25Hz to 16KHz Type ………………………………Constant Q (Accuracy 5% Center Frequency) Range ……………………………±6dB or ±12dB (Switch Selectable) Inputs: Connectors ………………………XLR 3Pin, 1/4" TRS Impedance ………………………20K Ohms Bal; 15K Ohms Maximum Level …………………+24dBu (Bal) +18dBu (Unbal) Outputs: Connectors ………………………XLR-3Pin, 1/4" TRS Impedanc
Service We recommend that if at all possible, a BBE GRAPHIC EQUALIZER which requires service be sent to our facility in Huntington Beach, California. We request that a “RETURN AUTHORIZATION” be issued by the dealer from whom you purchased the unit. If this is not possible, call BBE Sound, Inc. directly at (714) 897-6766, extension 116 to obtain a “RETURN AUTHORIZATION”. Include a copy of the bill of sale with the unit when it is shipped to BBE Sound, Inc. so that the service can be expedited.
® 5381 Production Drive Huntington Beach, CA 92649 714-897-6766 • FAX 714-896-0736 www.bbesound.com BBE is the registered trademark of BBE Sound, Inc. rev.
