1. INTRODUCTION
The 
LTO DPA900/1500 40 Bit DSP Stereo Amplifier is a high power, low profile, professional Power Amplifier
with advanced features and great reliability. In fact, the amplifier functions far beyond a traditional power amplifier,
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.
2.FEATURE LIST
Built in
Remote control through PC link
1 factory preset and 32 user presets by large memory capacity
Delay lines up to 582ms for each output
Easy to operate front panel controls
Stereo (dual channel), or bridge mono
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
3 2 | 4 5 | 7 | 8 | 9 |
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| PRESET |
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| CH1 | CH2 | EDIT |
| VOLUME |
ON |
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CLIP |
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| CHSEL |
| HUM CANCEL | |
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| COMM |
| NOISE GATE |
| LIMIT |
| 8 8 | MULTICOMP | |
| OPERATING/ |
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| PROTECTION |
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| SIG/LIMITER | ||
OFF | POWER ON |
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| UP | DOWN SELECT ENTER | ||
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POWER |
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| R |
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| LTO | |
40 BIT DSP ENHANCED Stereo Power Amplifier
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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.
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 
), 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.
5.Power LED
This LED lights up when the unit is powered.
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