User's Manual EQU Series 15/31 Band Graphic Equalizer R LTO www.altoproaudio.com Version 2.0 Dec.
the recommended fuse type as indicated in this manual. Do not short-circuit the fuse holder. Before replacing the fuse, make sure that the product is OFF and disconnected from the AC outlet. SAFETY RELATED SYMBOLS CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN Protective Ground This symbol, wherever used, alerts you to the presence of un-insulated and dangerous voltages within the product enclosure. These are voltages that may be sufficient to constitute the risk of electric shock or death.
Preface Dear Customer: Thanks for choosing and researches. LTO Graphic Equalizer and thanks for choosing one of the results of LTO AUDIO TEAM job For our LTO AUDIO TEAM, music and sound are more than a job...are first of all passion and let us say...our obse -ssion! We have been designing professional audio products for a long time in cooperation with some of the major brands in the world in the audio field.
TABLE OF CONTENT 1. INTRODUCTION ...................................................................................................................................4 2. FEATURE LIST .....................................................................................................................................4 3. CONTROL ELEMENTS.........................................................................................................................4 3.1 The Front Panel 3.2 The Rear Panel 4.
1. INTRODUCTION EQU Series Graphic Equalizers include the following seven models: EQU131 - Graphic Mono 31 Band Equalizer EQU215 - Graphic Stereo 15 Band Equalizer EQU2215 - Graphic Stereo 15 Band Equalizer EQU131VU - Graphic Mono 31 Band Equalizer / VU Meter*1 EQU231VU - Graphic Stereo 31 Band Equalizer / VU Meter*2 EQU231LED - Graphic Stereo 31 Band Equalizer / LED Display*2 EQU231TWIN - Graphic Stereo 31 Band Equalizer / LED Display*2 2.
20 25 31.5 40 50 63 80 100 125 160 200 250 315 400 500 630 800 1K 1.25K 1.6K 2K 2.5K 3.15K 4K 5K 6.3K 8K 10K 12.5K 16K 20K LEVEL HI-PASS LOW-PASS 40Hz 16KHz 16KHz 40Hz 12 6 BYPASS R LTO 31 Band Graphic Equalizer EQU231VU RANGE Channel One Channel Two BY-PASS CLIP HI-PASS LOW-PASS 40Hz 16KHz 40Hz 16KHz 12 ON 6 OFF BY-PASS 20 25 31.5 40 50 63 80 100 125 160 200 250 315 400 500 630 800 1K 1.25K 1.6K 2K 2.5K 3.15K 4K 5K 6.
.Bypass LED When this LED lights, it is in bypass mode. 8.Range switch This button switches the gain range of the filter potentiometer between 9.Filter range indicator When the 6dB range is selected, green LED will light. When the 6dB and 12dB. 12dB range is selected, red LED will light. 11.VU meter This VU meter is used to indicate the output level. 12.High pass LED When the High pass filter (40Hz/12dB) is in active, this LED will light. 13.
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18. Ground lift switch This switch is used to disconnect the signal ground from the mains and chassis earth. If it is determined that the equalizer is the cause of hum or buzz in your system due to a ground loop, move this switch to the "lift" position. 19. Fuse holder / Voltage selector 220-240V 110-120V 220-240V 110-120V THIS IS SET FOR 110V AC TO 120V AC OPERATION THIS IS SET FOR 220V AC TO 240V AC OPERATION Please note the triangular markers on both sides of the fuse holder (see above figure).
- In Line Connection For these applications the EQU Series Graphic Equalizer provides 1/4" TRS connectors, XLR connectors and RCA connectors to easily interface with most any professional audio device. Follow the configuration examples below for your particular connection.
5. APPLICATION 5.1 The Sound Frequency In recording studios as well as stage or radio plays, the EQU Series Graphic Equalizer will be your valuable sound tool to modify the frequency "contour" of a sound. But first of all, you should clarify the typical frequency of each instrument and voice, so that can you obtain nice results in terms of sound characterization. The tables on the following pages give you an idea of specific frequencies and their acoustic significance.
5.2 Equalizer In Sound Reinforcement Systems The EQU Series Graphic Equalizers can be used in the sound reinforcement systems to: Eliminate unwanted sounds, such as the 60Hz Hum noise. Shape the sound by changing the frequency response of the track. Special effects like telephone sounds are done by cutting off the low end to 200Hz and the high end to 6KHz. Allow you to modify the sound of the instrument if put EQU Series Equalizer in line with a musical instrument.
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7. WARRANTY 1. WARRANTY REGISTRATION CARD To obtain Warranty Service, the buyer should first fill out and return the enclosed Warranty Registration Card within 10 days of the Purchase Date. All the information presented in this Warranty Registration Card gives the manufacturer a better understanding of the sales status, so as to purport a more effective and efficient after-sales warranty service.
SEIKAKU TECHNICAL GROUP LIMITED No. 1, Lane 17, Sec. 2, Han Shi W. Road, Taichung, 401 Taiwan http://www.altomobile.com Tel: 886-4-22313737 email: info@altomobile.com Fax: 886-4-22346757 All rights reserved to ALTO Mobile. Due to continued development in response to customer feedback, product features, specifications and/or internal/external design may be changed without prior notice. No photocopying, translation or reproduction of any part of this user manual is allowed without prior written permission.
