D.A.S. Audio PS Series - Manual (Page 19)

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INTRODUCTION
FRONT PANEL DESCRIPTION
General
Thank you for purchasing a D.A.S. power amplifier.
It has been built with the most advanced modular
technology, and has been designed through the use of
computer-aided design for both the electronic and
mechanical parts.
Power switch (A)
Turns the amplifier on(" I " position), and turns the
amplifier off ( " 0 " position).
Input LEVEL controls (C)
Volume levels for each channel can be adjusted by
using the knobs found on the front panel. Gain is
maximum when the
rotary potentiometer is
rotated fully clockwise.
LEVEL
CLIP LED (D)
In the event that the signal's excursion exceeds the
maximum voltage from the power supply, the unit will
indicate saturation through the clip LED of the channel
involved. An automatic limiting system will impede
prolonged saturation.
Features
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Class AB (except , which is class G).
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Dual balanced XLR inputs.
( , .
Variable speed back-to front fan cooling.
Front located volume controls.
Input sensitivity switchable between 0.775V, 1V
and 1.44V.
Ground anti-loop selector.
Stereo, parallel and mono operation modes.
Complete and independent protections on each
channel against output short-circuits, overloading
and overheating.
The power supply is protected against short-
circuits, voltgae and current overloading; triggering
the latter to the standby mode.
Clip limiters.
Clip, protection and idle LED indicators.
PS-2400
PS-800 PS-2400
L r power supply.
Binding post and Speakon output connections
and only)
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PS-1400
PROTECTION LED (E)
When a channel's output is disconnected by the
amplifier's protection, this yellow LED is on.
A channel's protection may be triggered by:
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Overheating sensed at any part of a channel.
When the amplifier has cooled down, the
channel's output will be connected and operation
will resume. The control circuit has some degree of
built-in
hysterisis to avoid turn-on and off
oscillations.
Presence of DC at a channel's output. Since it
may severely damage speakers, the amplifier will
deactivate the output in the event that DC levels
are too high. Once DC is no longer present, the
LED will turn off and output is
reactivated.
Short-circuit at a channel's output (only
and ) or load impedance is too low this
protection is activated. In this case, once the short
circuit is gone the output is NOT reactivated; the
amplifier needs to be switched off and on to
reactivate.
When the amplifier is switched on. The output is
also deactivated for a few seconds to prevent
dangerous transients from damaging the speakers.
PROTECTION
PS-200
PS-400
Power LED: ON (B)
When these green LEDs illuminate, it indicates that
both amplifier channels are ready.
SIGNAL LED(F)
Cooling air outlet grilles (G)
These green LEDs show the presence of signal at
the amplifier's inputs, and is dependent on the
position of the
control. LEVEL
Fan cooling permits airflow through the most vital
parts of the amplifier. Since the airflow finds its way
out through these grilles, keep them as clean and
dust-free as possible to assure proper cooling.
PS-800, PS-1400, PS-2400
PS-200, PS-400
Protection
Clip
Signal Signal
Protection
Clip Level A Level B
PowerPro Series On On
F E D B A G C
Level A Level B
PowerPro Series
Protection
Clip
Signal
On
Protection
Clip
Signal
On On
F E D B A G C
EN
Manual del Usuario / PS / User’s Manual