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User's Manual
15/31 Band
Graphic Equalizer
EQU MK Series
31 Band Graphic Equalizer
OUTPUT
+12 +6 +12
R
LTO
POWER OUTPUT
EQU131VU
R
LTO 0 0dB
GRAPHIC MONO
INPUT OUTPUT
31 BAND EQUALIZER
/VU METER
SIG CLIP SIG CLIP
6 12 40Hz 16KHz ON
-12 -6 -12
RANGE HI LOW EQ
INPUT
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 PASS PASS
LEVEL
R
LTO
www.altoproaudio.com
Version 1.2 August 2004
English
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the recommended fuse type as indicated in this manual. SAFETY RELATED SYMBOLS Do not short-circuit the fuse holder. Before replacing the fuse, make sure that the product is OFF and disconnected CAUTION from the AC outlet. RISK OF ELECTRIC SHOCK DO NOT OPEN Protective Ground This symbol, wherever used, alerts you to the pre- Before turning the product ON, make sure that it is sence of un-insulated and dangerous voltages with- connected to Ground. This is to prevent the risk of in the product encl
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Preface Dear Customer: Thanks for choosing LTO Graphic Equalizer and thanks for choosing one of the results of LTO AUDIO TEAM job and researches. 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. The LTO line presents unparalleled analogue and digital products made by Musicians for M
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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.
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2.Level control This control sets the input signal level to the equalizer. Its "0dB" position is unity gain (no boost or attenuation). If the clip LED (5) is light continuously, turndown this control until it only flickers occasionally. 3.High pass filter This button electronically inserts a filter into the signal path, which cuts the low frequencies at 40Hz (12dB per octave). The LED (12) indicator lights when the button is pressed and this filter is serving in the circuit. 4.Low pass filter Th
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16. 1/4" TRS phone plug input and output connector The 1/4" TRS connector are actively balanced and are used to input/output the signal. 17. RCA input and output connector The RCA connector are unbalanced. NOTE: While you can use any input connector with any output connector, only one set of these connectors is to be used at one time, detail wiring and connection, please refer to 4.2 audio connection. 18. Ground lift switch This switch is used to disconnect the signal ground from the mains and c
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5. APPLICATION 5.1 The Sound Frequency In recording studios as well as stage or radio plays, the EQU MKII 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 you can obtain nice results in terms of sound characterization. The tables on the following pages will give you an idea of specific frequencies and their acoustic significance. Typical Frequenc
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5.2 Equalizer In Sound Reinforcement Systems The EQU MKII 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 MKII Series Equalizer in line with a musical instrument. you can brighten the
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6. TECHNICAL SPECIFICATIONS Type EQU231VU-MKII 2 31 Band: 1/3 octave, ISO spacing (2H series) 2 31 Band: 1/3 octave, ISO spacing (2H series) EQU231-MKII 2 15 Band: 2/3 octave, ISO spacing (3H series) EQU231TWIN-MKII 1 31 Band: 1/3 octave, ISO spacing (2H series) EQU131VU-MKII 1 31 Band: 1/3 octave, ISO spacing (1H series) EQU131-MKII 2 15 Band: 1/3 octave, ISO spacing (1H series) EQU215-MKII 2 31 Band: 1/3 octave, ISO spacing (2H series) EQU215TWIN-MKII Slider travel 20mm with positive centre de
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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. Please fill out all the information carefully and genuinely, miswriting or absence of this card will
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SEKAKU ELECTRON INDUSTRY (H.K.) CO. LTD. No.1, Lane 17, Sec. 2, Han Shi West Road, Taichung, 401 TAIWAN http://www.altoproaudio.com Tel:886-4-22313737 email: alto@altoproaudio.com Fax:886-4-22346757 All rights reserved to ALTO. All features and content might be changed without prior notice. Any photocopy, translation, or reproduction of part of this c manual without written permission is forbidden. Copyright 2004 Sekaku Electron NF01783-1.2
