Johannus DSA-4 Manuel utilisateur
User’s Manual
JOHANNUSJOHANNUS
DigitalStereoAcousticsDSA-4
User’s Manual DigitalStereoAcousticsDSA-4
JOHANNUSJOHANNUS
Document information
Document Code DSA4V101US.wpd
Document Title User’s Manual JOHANNUS Digital Stereo Acoustics DSA-4
Issue Date October 1998
Serial Number
© Copyright 1998 JOHANNUS Orgelbouw b.v. The Netherlands
All rights reserved. No part of this publication may be reproduced and/or published by print, microfilm, audiotape,
electronically, mechanically or any other means, or stored in an information retrieval system, without prior written
permission from JOHANNUS Orgelbouw.
The information in this document is subject to change without notice and should not be considered a commitment
by Johannus Orgelbouw b.v. No responsibility is assumed for any error which may be appear in this document.
User’s Manual DigitalStereoAcousticsDSA-4
JOHANNUSJOHANNUS
Introduction
Congratulations on your decision to purchase a new JOHANNUS acoustic system.
With the 4-channel Digital stereo acoustics (DSA-4) you are able to create an acoustical environment
in your room, electronically, similar to that of a cathedral or a concert hall.
User’s Manual DigitalStereoAcousticsDSA-4
JOHANNUSJOHANNUS
Table of Contents
Installation ................................................................... 1
The acoustic system ...................................................... 1
Installing the loudspeaker boxes ............................................. 1
Installing the acoustical .................................................... 1
Connecting the loudspeaker boxes ........................................... 1
Connecting other devices .................................................. 4
Organ ........................................................... 4
Second device .................................................... 4
Set up ....................................................................... 5
Connecting the powercord .................................................. 5
Switching on ............................................................ 5
Controls .................................................................... 6
Frontpanel ............................................................. 6
Switch Organ/Aux In ...................................................... 7
LED indicator ........................................................... 7
Adjusting the input signal level .............................................. 7
Adjusting proportions direct signal/acoustic signal ................................ 7
Adjusting the output signal level ............................................. 8
Program switch ......................................................... 8
Program ............................................................... 9
Power switch ............................................................ 9
Maintenance ................................................................ 10
Guarantee .................................................................. 10
Apendices .................................................................. 11
Technical specifications .................................................. 11
acoustic system .................................................. 11
Loudspeaker boxes ............................................... 11
User’s Manual DigitalStereoAcousticsDSA-4
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Installation
The acoustic system
The complete system consists of:
!Acoustic system
!4 loudspeaker boxes
!1 powercord
!30 meter (90') loudspeaker cable
!1 audio cable
Installing the loudspeaker boxes
First of all you have to install the loudspeakers in their correct location. The best result is
obtained by installing the loudspeakers in a square as large as possible around the “listener’s
location”. Normally this is the place where you as the organist are playing the organ.
The drawings below give a possible loudspeaker configuration in a square and an L-shaped
room.
Installing the acoustical
Determine the correct placement for the acoustical system control console considering the
length of the loudspeaker cables. Typically this is on top of the organ left or right of the music
rack.
Connecting the loudspeaker boxes
Cut the supplied loudspeaker cable in 4 (different) lengths to connecting the four loudspeaker
boxes. Split-up each end of the 4 loudspeaker cables for about 5 cm (2") and strip each wire
1cm ( 0.5").
User’s Manual DigitalStereoAcousticsDSA-4
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2
Twist the stripped ends of each wire to make it easy to connect them to the connector of the
loudspeaker boxes (see drawing).
To connect the loudspeaker wires push the red or the black connector button at the back of the
loudspeaker box or the acoustical system. Put the end of the stripped wire into the connector
hole and release the red (black) connector button.
To avoid a bad connection you have to check if only the stripped wire end is put in the connector
hole. When the insulation is put in the connector hole too, this channel will not work.
Also check if the loudspeakers are not connected in anti-phase. This means that the polarity of
the two wires is not the otherway around compared to the other loudspeaker boxes. This results
in the fact that the loudspeakers will work against each other instead of working together to
reproduce the sound. This wrong connection will give no defects to the device or the speakers
though. To avoid this ani-phase connection you have to make sure to always connect the wire
with the ‘round’ insulation into the red connector button of the speaker box and the wire with the
‘square’ insulation into the black connector button of the speaker box (see drawing).
User’s Manual DigitalStereoAcousticsDSA-4
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3
To achieve the optimal sound spread of channels it is the best to set up the loudspeakers as in
the following drawing.
User’s Manual DigitalStereoAcousticsDSA-4
JOHANNUSJOHANNUS
4
Connecting other devices
After connecting the loudspeaker boxes you connect the organ and or possibly an other device
like, for example a Hifi system to the Johannus digital acoustic surround system.
For this purpose there are four audio inputs at the back of the acoustic device.
Organ
The two most right inputs (seen from the back) are the organ inputs for left and right.
Second device
The two left inputs (seen from the back) are the inputs for another device. These are the inputs
for left and right.
User’s Manual DigitalStereoAcousticsDSA-4
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Set up
Connecting the powercord
1. Check if the voltage as indicated on the serial number plate matches the main power voltage
the system will be connected to. The serial number plate is located at the back of the
acoustic device.
2. Connect the supplied power cord to the main power connection. Integrated in the main power
connection is the main fuse (see drawing).
3. Connect the acoustic system to a grounded outlet. If it is not grounded some functions may
not work apropriate.
Switching on
First switch on the connected devices like the organ and e.g. a Hifi-equipment. Then switch on
the acoustic device by pushing the power switch. The power switch indicator light will light up.
User’s Manual DigitalStereoAcousticsDSA-4
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6
Controls
Frontpanel
All controls are located at the front of the DSA-4. The control functions are indicated on the
drawing as follows:
1. Switch: Organ / Aux In (other device)
2. LED indicator
3. Input level control
4. Proportion control of direct sound / acoustic sound
5. Output level control
6. Program switch
7. Program adjustment
8. Power switch
These functions will be explained in the following pages.
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