Kenwood AUDIO PROCESSOR User Manual
EQplus
AUDIO
PROCESSOR
OPERATING MANUAL
EQplus
AUDIO
PROCESSOR
OPERATING MANUAL
September 2004
W2IHY
TECHNOLOGIES
Julius D. Jones
19 Vanessa Lane
Staatsburg, N.Y. (12580)
(845) 889-4253
E-mail: Julius@W2IHY.COM
Home Page: http:// www.w2ihy.com
c 2004 W2IHY, ALL RIGHTS RESERVED
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TABLE OF CONTENTS
Introduction ......................... 4
Front Panel Controls .......... 5 - 9
Rear Panel Controls ............10 - 11
Schematic (Front Panel) .......12 - 13
Schematic (Rear Panel) .......14
Rear Panel Controls ...........15
Getting Started Tutorial .......16-19
Internal Wiring .................... 20
Audio Out Cable wiring ...... 21 - 24
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INTRODUCTION
EQplus
AUDIO
PROCESSOR
The EQplus is the next generation of audio processing
equipment from W2IHY Technologies. The EQplus was
designed to be directly attached to the world famous
W2IHY 8 Band EQ. The EQplus provides features such
as Audio Compression, Downward Expansion, Effects
and connectivity to 3 radios. All these features, and
more, were designed in a way that makes the EQplus
easy to use. Extensive testing was done by amateurs
on many different radios on AM, FM and SSB so that the
product would be ready for you to use problem free.
Buying the EQplus gives you the availability to Amateur
Service unrivaled in the hobby. We feel so confident that
you will be delighted with the EQplus that we offer a 30
day money back, no questions asked guarantee. The
EQplus represents the new reference point for easy to
use amateur radio audio equipment.
If I did not think you would be delighted with The EQplus
I would have not put my call sign on it. Thanks for your
purchase and we appreciate your business.
Julius D, Jones (W2IHY)
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FRONT PANEL CONTROLS
6
8
9
7
11
12
10
16
2
1
This section describes each of the controls on the front panel. You
should read through this section now. Some of the descriptions will
be more meaningful after you first work through the Getting
Started Tutorial.
4
3
5
14
15
13
17
(1) Power On/Off Switch (S1)
This switch turns the unit's power on and off.
(2) Power on LED (LED1)
This LED goes on when power is on in the unit.
(3) Audio Input Mic PWR (Power) Switch (S6)
Turning this switch on puts +5V onto what is plugged into the Mic
In and Aux Input connectors. The Mic power switch must be on if
you have any of the following microphones connected directly into
the EQplus:
- ICOM HM12, HM36, SM6 etc..
- Heil microphones made specifically for ICOM radio’s such as
the HMI and ICM
- Elecract MH2 (made for the Elecraft radio by Heil Sound )
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FRONT PANEL CONTROLS
EQplus BAR GRAPH MONITORING
Compressor Equalizer
Bar graph monitoring
off off Output of Audio Amp
off on Output of Equlaizer
on off Output of Compressor
on on Output of Compressor
dB reading
Peak to Peak
voltage
0 1 Volt
-6 500 mv
-12 250 mv
-24 125 mv
(4) Audio Input Impedance Switch (S5)
This 3 position toggle switch is used to change the input impedance
of the Mic and Aux Inputs (19,20 & 21). Input Impedances of 200 ohms,
600 ohms and 50K ohms ( HI-Z)may be selected.
(5) Mic In Gain (R12)
This potentiometer, when turned clockwise, can increase the Audio Input
signal levels up to about +40dBv. The mic gain should be changed while
speaking into the microphone, until 3 or 4 green Bar Graph (7) LED’s
are illuminated. Audio levels should be maintained in the green and
yellow ranges of the LED Bar Graph(6) .
(6) LED Bar Graph
The 10 segment LED Bar Graph indicates peak to peak EQplus internal
audio levels. The position of the Equalizer (7) and Compressor /
Downward Expander (10) switches control what internal function is being
indicated. The tables below defines what the LED Bar Graph is indicating.
The pictorial below shows the EQplus Audio Chain
EQplus AUDIO CHAIN
ON
VV
OFF
VV
AUDIO
AMP
VV
Audio Out
Audio IN
Audio
VV
Amp
VV
Band EQ
Dual
ON
VV
OFF
Comp./
Dwrd Expd.
VV
ON
VV
OFF
VV
BAR
GRAPH
EFFECTS
PROC.
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FRONT PANEL CONTROLS
(7) Equalizer On/Off Switch (S3)
This switch turns the Equalizer on and off. When the equalizer is
off, adjusting the bass and treble controls have no effect on the
output audio.
(8) Equalizer Bass (R37)
This rotary potentiometer works only when the Equalizer Switch
(7) is on. Turning this control clockwise increases the amount of
bass boost. Turning this control counterclockwise decreases the
amount of bass boost. The detent at the half way point of rotation
represents 0 dB of boost. Each case marking represents 4dB.
(9) Equalizer Treble (R38)
This rotary potentiometer works only when the Equalizer Switch
(7) is on. Turning the control clockwise increases the amount of
treble boost. Turning this control counterclockwise decreases the
amount of treble boost. The detent at the half way point of rotation
represents 0 dB of boost. Each case marking represents 4dB.
(10) Compressor / Downward Expander On/Off Switch (S2)
When the switch is in the off position the compressor and
downward expander have no effect on the EQplus’s audio.
(11) Compressor / Downward Expander COMPRESSOR (COMP)
POTENTIOMETER (R22)
This potentiometer works only if the Compressor / Downward
Expander switch (10) is on. The COMP potentiometer controls
the amount of compression that will be done by the unit. If the
COMP potentiometer is turned fully counterclockwise then there
will be no compression introduced (0 dB) to incoming signals.
If the COMP potentiometer is rotated fully clockwise then
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