D.A.S. PS Series User Manual Download 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).

inea

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

r power supply.

Binding post and Speakon output connections

and

only)

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:

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

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

Protection

Clip

Level A

Level B

PowerPro Series

Level A

Level B