Feature list, Control elements, Front panel – Nilfisk-ALTO DPA900/1500 User Manual

Page 5: Introduction

2. FEATURE LIST

Built in 40-bit digital effect processor.
Remote control through PC link
1 factory preset and 32 user presets by large memory capacity
Delay lines up to 582ms for each output

User-controllable clip limiter.
Stereo (dual channel), or bridge mono (bi-amp output) operation mode.
Balanced XLR inputs/parallel outputs to ensure noiseless long wiring.
Binding post and Neutrik Speakon connectors for outputs.
Front panel LED indicators for operating/protection, limiter, power and clip.
Manufactured under QS9000, VDA6.1 certified management system.

3. CONTROL ELEMENTS

3.1

Front Panel

The

LTO DPA900/1500 40 Bit DSP Stereo Amplifier is a high power, low profile, professional Power Amplifier

with

In fact, the amplifier functions far beyond a traditional power amplifier,

advanced features and great reliability.

it is also a versatile effect processor. You can set the input and output audio configuration through recalling one
of the presets included in the internal memory or PC editor software.
The amplifier delivers tremendous power in only two rack spaces, providing high performance under the most
demanding conditions. It contains two independent channels, with separate AC transformer secondaries, power
supplies and protection system. All protection systems, except the main AC one, are self resetting upon removal
of fault, and the remaining channels shall continue to operate. Each channel has independent protective circuitry
against open circuit, short circuit, mismatched loads and over temperature.

Thanks to the use of selected and expensive components, the performance of DPA900/1500 is worth much more

than its price.

1. Power Switch

Turn the unit power ON or OFF.

2. Clip LED

When the signal distortion reaches or surpasses 0.5%, the LED lights up. This means the output level of
signal source is too high and it is time to reduce input level until clip LED turns off.

3. Output Limiter LED

While the unit is limiting the output signal, the LED lights up.

1. INTRODUCTION

4. Operating and Protection LED

In normal operation, the LED is yellow, if the LED is off, it means the unit is in heat protection, no signal output at

the time and over-heat inside the unit (the surface temperature of power transistor is over 100

), the temperature

must be lowered through better ventilation and decrease the signal level etc. After the temperature has dro-
pped, the protection stops and meanwhile the LED turns off with the unit recover normal work.

This LED lights up when the unit is powered.

5. Power LED

Easy to operate front panel controls

CH1

CLIP

LIMIT

OPERATING/

PROTECTION

POWER ON

40 BIT DSP ENHANCED

Stereo Power Amplifier

DOWN

ENTER

SELECT

POWER

OFF

4 5

CH2

LTO

DPA 1500

PRESET

EDIT

VOLUME

CHSEL

HUM CANCEL

COMM

NOISE GATE

MULTICOMP

SIG/LIMITER