Alto EQU231- MKII V2 Bedienungsanleitung
www.altoproaudio.com
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Version 1.0
MODEL: EQU231- MKII V2
Revised on Jan,2010
CONTENTS
1. Introduction..................................................................................................................1
2. Specification.................................................................................................................2
3. Block Diagram..............................................................................................................3
4. Schematic Diagram.....................................................................................................4
5. Wiring Diagram............................................................................................................7
6. PCB Layout.................................................................................................................8
7. Test Procedure...........................................................................................................11
8. Exploded View & Mechanical Parts List.....................................................................15
9. BOM List....................................................................................................................17
The EQU231-MKII V2 Graphic Stereo 31-Band Equalizer is an extremely musical and
flexible Graphic Equalizer, based on many years of experience and designed to provide a
permanent precise equalization to musician, performer, and studio engineer. It can be used
wherever is requested to modify the frequency “contour” of a sound and can offer a solution
to many common sound problems and allows the user to use the creativity to obtain nice
results in terms of sound characterization.
The EQU231-MKII V2 Graphic Stereo 31-Band Equalizer Features:
Constant Q circuitry with a 3% center frequency accuracy
Control range +/-6dB/+/-12dB selectable
Active balanced and unbalanced input and output connectors
Variable input level control
Signal clop pilot
Ground “LIFT” switch to disconnect signal ground from chassis ground
Power off automatic bypass function
Line voltage selectable robust and compact design
Manufactured under QS9000, VDA6.1 certified management system
1. Introduction
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Type EQU231-MKII V2 2*31-Band: 1/3 Octave, ISO spacing(2H series)
Slider Travel 20mm with positive centre detent
Range +/-6dB or +/-12dB selectable
Active balanced XLR and 1/4'' TRS
Unbalanced RCA
20k Ω(bal.)
15k Ω(unbal.)
Maximum input level 14 dBu
Active balanced XLR and 1/4'' TRS
Unbalanced RCA
Output impedance ＜600Ω
High pass filter 40Hz(12dB/Oct)fixed-button type
Low pass filter 16KHz(12db/Oct)fixed-button type
Frequency response 20 Hz to 50kHz at -1.5dBu
THD+N% ＜0.01% (@1kHz, all VR at middle position)
S/N Ratio 110dB
95V -120V AC -60Hz
220V-240VAC -50Hz/60Hz
Consumption 18W
Dimension 483(W)*220(D)*88(H)mm (19''*8.66''*3.5'')
Power supply
Input impedance
Output connections
Input connections
2. Specification
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3. Block Diagram
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4. Schematic Diagram
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5. Wiring Diagram
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6. PCB Layout
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Inhaltsverzeichnis
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