Dynasound DS1042 User manual
Dynasound, Inc. 6439 Atlantic Blvd. Norcross, GA. 30071 800.989.6275
DS1042
Soundmasking System
Dynasound, Inc. 6439 Atlantic Blvd. Norcross, GA. 30071 800.989.6275
Unpacking
The unit was carefully checked before leaving the factory. Inspect both the unit and its shipping
container for indication of improper handling. Report any equipment damage to the distributor imme-
diately. If the unit was shipped to you, notify the shipping carrier without delay and place your claim.
Unpack the unit. It is ready to be installed.
Description
This model contains a digital masking generator, low pass filter, 25 Watt amplifier, volume control, and an
equalizer control. The 70 Volt outputs consist of two phono plugs and one terminal strip.
Installation
As with any power amplifier, this unit requires proper ventilation for safe use as well as it own long-term
reliability. The DS 1042 requires a free flow of cooling air on all sides as well as the top and bottom. Never
place articles such as books, etc. on top of the unit or against its sides. Never operate the unit on a soft
surface such as carpeting, etc. that may effect airflow on the bottom of the unit. Never operate the unit
near a heat vent or other heat generating devices. The power amplifier relies upon its ability to get cool
air.
Connecting & using the masking generator/amplifier
1- Connect a 25 Watt (or less) load to the 70 Volt output. The 70 Volt outputs consist of two phono plugs
and one terminal strip. Connect all masking devices to the phono plug and/or terminal block making
sure that the load does not exceed 25 Watts.
2- Turn all front panel controls to “0”.
3- Plug the DS1042 power cord into the outlet. Turn the Volume control (left control) clockwise until you
hear the masking sound coming from the first masking device. (The setting will be at about 7:45 on
the dial.) It should be set very low so you can just hear it. The purpose of this is to make sure that
each masking device is operational.
Equalization
Set the volume control on the DS1042 unit to 9 o’clock and the equalizer (low pass filter) control to 6
o’clock (off position). Check all speakers to make sure that they are connected and operating properly.
Make sure that all ceiling panels that have been removed are put back in place if the installation includes
plenum speakers.
For New Spaces
For 9 foot high, 1/2 to 3/4 inch thick mineral fiber ceilings with reflective (no spray-on or batt insulation)
ceiling plenums, set the volume control indicator to the 8:45 position on the dial and the equalizer control to
the 10 o’clock position. For 1 inch foil backed glass fiber ceilings with conditions as above, set the volume
Dynasound, Inc. 6439 Atlantic Blvd. Norcross, GA. 30071 800.989.6275
LOUDNESS LEVEL. The system can now be subjectively fine tuned for effectiveness and comfort. If
the sound masking level is too high, turn the volume control knob counterclockwise, in no more than
fifteen minute increments, until the desired loudness level is achieved. If the sound masking level is too
low, turn the volume control knob clockwise, in fifteen minute increments, until the desired loudness
level is achieved.
Equalization
IF ASSISTANCE IS REQUIRED: CALL (800) 989-6275.
If a sound level meter is available, the following spectrums are recommended:
FREQUENCY 100 125 160 200 250 315 400 500 630 800 1000 1250
1/3 OCTAVE 47 46 45 44 43 42 41 40 39 37 35 34
ONE OCTAVE 51 48 45 40
FREQUENCY 1600 2000 2500 3150 4000 5000 6300 8000 1000
1/3 OCTAVE 32 30 27 24 21 20 17 14 11
ONE OCTAVE 35 26 19
control indicator at the 8:30 position on the dial and the equalizer control to the 11:30 position. If these
design characteristics do not apply, ontact Dynasound, (800) 989-6275,for tuning assistance.
OCCUPIED SPACES
If masking sound is being added to an existing space that is currently in use, THE MASKING MUST BE
INTRODUCED SLOWLY, so that it won’t call attention to itself. Therefore, once the initial installation is
complete, it will take weeks to bring the masking sound up to its recommended level for effective pri-
vacy. After tuning the masking as per the above procedure for unoccupied new space, record the final
settings for both the volume and equalizer controls. Indicate on the bottom of the DS1042 unit, with a
permanent marker, the recommended settings.
INITIAL MASKING LEVEL SETTINGS FOR OCCUPIED SPACES
If you have a sound level meter, measure the existing ambient background in several areas and record
the lowest reading. Now go to the DS1042 unit and set the volume so that the masking level is 2 dBA
above the lowest ambient reading that was recorded. If you do not have a sound level meter, set the vol-
ume control on the DS1042 unit to eight (8) o’clock.
RAISING THE INITIAL MASKING LEVEL SETTINGS IN OCCUPIED SPACES
After a continuous Monday to Friday cycle of non-interrupted masking at the initial setting, raise the
masking level 2 dBA or about fifteen (15) minutes on the volume control from the initial setting. This
increase in level must be done on Friday at the end of the work day after most of the employees have
left the building.
Continue this weekly increase until the final setting as determined above is met. If there are objections
Dynasound, Inc. 6439 Atlantic Blvd. Norcross, GA. 30071 800.989.6275
about the masking level being to high, as the system is being raised to its final design, reduce the vol-
ume by 4 dBA, or thirty (30) minutes on the volume control. Leave the masking level at this setting for
two (2) weeks and again begin raising the masking level as per the above technique.
Warranty repairs
Dynasound warrants its products from internal failure in normal use for one (1) year, and will repair
units within the warranty without charge. Improper functioning, for warranty purposes, means failure of
the system to generate masking sound due the defects not caused by the owner. It does not include
such owner caused malfunctions as accidental turning off of the system, readjustment of the controls,
retuning of the system, or injury to the system beyond normal wear. The owner must pay freight to
return the unit and Dynasound will pay the freight for return.
Non warranty repairs
For non-warranty repair, the owner must pay freight to return the unit. If the customer has credit, Dy-
nasound will repair the unit and return it with an invoice for both the repair and return freight charges.
If credit has not been established, the repair and return will be C.O.D. Dynasound will notify the owner
after any factory service whether it was a warranty repair or not.
Factory service facility is located at:
Dynasound, Inc.
6439 Atlantic Blvd.
Norcross, Georgia 30071
Tel: (770) 242-8176
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