Sub-18A
Manual del usuario /
User's manual
9
1. INTRODUCTION
1.1 General
Thank you for purchasing D.A.S. products. This unit represents
30 years of expertise in transducer and enclosure design,
achieving a system that utilises the most advanced sound
reinforcement technology to deliver outstanding audio
performance and maximum reliability.
This manual contains the required information to make the
best use of the system you have purchased. Please take the
time to read it.
Our Web site at www.dasaudio.com contains further support
information such as enclosure and system drawings, data for
modelling software, architectural specifications and
specification sheets.
1.2 Features
•
Self-powered bass system
•
500W class-D high efficiency amplifier with built-in limiter
•
18” speaker for extended low frequency response
•
Control electronics for maximum performance and ease of
setup
•
XLR (Cannon) balanced input
•
XLR (Cannon) parallel output
•
XLR (Cannon) satellite output
•
Steel reinforced bar handles
•
Rugged rectangular MDF enclosure
•
35-mm socket for top box support
2. AMPLIER PANEL DESCRIPTION
A)
LIMIT : Amplifier saturation indicator light. When lit, the
level of the signal source should be reduced.
B)
SIGNAL : Signal presence indicator at the amplifier’s inputs.
C)
ON : Indicator light for each amplifier channel.
D)
FUSE
E)
AC INPUT : with PowerCon NAC 3 connector. Only when
the connector is inserted and rotated (clicked) into place will
the AC turn on. The connector can be used as a switch,
rotating the connector to or from the locked position will turn
the unit on or off, respectively.
F)
INPUT : Balanced signal XLR. Pin assignments as follows :
1 = GND (Ground)
2 = (+) Non-inverted input
3 = (-) Inverted input
G)
LOOP THRU : Used for paralleling several units, which will
share the same input.
H)
SATELLITE OUTPUT: This sends the high-passed signal to
the system that will reproduce the mid-high frequencies.
I)
SUB LEVEL : Used to control the subwoofer level. Does not
affect the satellite output. To prevent accidental mis-setting, a
flat-blade screwdriver is needed to rotate the control, which is
recessed and detented. Depending on the sensitivity of your
mid-high system, you may need to adjust this control for
balanced frequency response.
3. USE
3.1 Switch on-off
A sound system should be switched on sequentially. Switch
on the self-powered subwoofer units last in your sound
system (switch on the subwoofer before the mid-high
system). Switch on the sound sources such as CD players or
turntables, then the mixer, then the processors, and finally the
self-powered unit . If you have several units, it is
recommended that you switch them on sequentially one at a
time.
Follow the inverse order when switching off, turning self-
powered units off before any other element in the sound
system.
3.2 Overload (
LIMIT) indicator
The red
LIMIT LED indicator should not be lit continuously.
This distorts the signal (quickly fatiguing your ears) and may
damage the speakers. Therefore, it is recommended that you
never work with this LED on; at most it should blink only
occasionally.
3.3 Overheating
In normal use, the amplifier panel will be warm to the touch.
If the unit stops playing, the amplifier’s overheating protection
may be activated for protection from thermal damage.
Overheating may be due to insufficient cooling, or to very
aggressive use in extremely hot conditions. Do not use the
unit in proximity to high power lights.
Once the amplifier cools down, it switches back on
automatically. If the unit should shut down again, try reducing
the volume a notch to avoid overheating.
3.4 Equalisation
The units does not need extreme settings of equalisation to
produce quality sound. Avoid high levels of gain on the
equalisers. Gain values above +3 dB on a console's EQ are
not recommended.
