LD Systems DSP 45 K 4-Channel /B_STOCK



LD Systems DSP 45 K
4-Channel Power Amplifier with DSP

The LD Systems® DSP 45 K is a professional 4-channel power amplifier with extensive DSP control. Designed for demanding large-scale sound reinforcement and concert-quality performance, it delivers a massive 1,200 watts per channel and 2 x 2,400 watts bridged. The high-efficiency Class H topology and switch mode power supply with power factor correction (PFC) provide a wide dynamic range and excellent transient response.

The DSP 45 K features comprehensive protection circuitry including power-up, DC, overcurrent, thermal and short circuit protection plus current and clip limiters to prevent SMPS overload and loudspeaker damage. Together with a pair of temperature controlled fans, they ensure exceptional reliability in the most demanding applications. The 24-bit DSP allows precise control with FIR and IIR filters, parametric EQ, crossover, delay, RMS and peak limiter functions. User configurable loudspeaker presets with password protection enable fast setup

The DSP 45 K is housed in a dual rack space all-steel chassis and weighs just 7 kg. It provides balanced Neutrik® XLR inputs, speakON® output connectors plus USB and Ethernet ports. The front panel sports a menu driven 4-line display and rotary encoder with push button switch for easy configuration. For optimal speaker performance and safe operation the DSP 45 K comes with an LD Systems® loudspeaker preset library, and the included software enables computer control and monitoring.


Product type
Power Amplifiers
Rated ouput power (1kHz @ 2 Ohms)
4 x 1200 W
Rated ouput power (1kHz @ 4 Ohms)
4 x 1200 W
Rated ouput power (1kHz @ 8 Ohms)
4 x 675 W
Rated ouput power (1 kHz @ 4 Ohms, bridged)
2 x 2400 W
Rated ouput power (1kHz @ 8 Ohms, bridged)
2 x 1200 W
High Z 70Vrms / 100Vpeak
4 x 1200
High Z 100Vrms / 140Vpeak
2 x 2400
Output circuitry
Class H
Frequency response
10 – 22000 Hz
Total Harmonic Distortion (THD)
< 0.05 % @ 1 kHz
Signal-to-noise ratio
104 dB
Protection circuits
clip limiter, DC protection, Multiband limiter, over-current, RMS speaker limiter, short circuit, soft start, thermal protection
Direct access buttons, Exit / lock button, knob, On / off switch
LC display
Line inputs
Line input connectors
Neutrik XLR
Line outputs
Line output connectors
Neutrik XLR
Loudspeaker outputs
Speaker output connections
2 fans, temperature controlled
Maximum Ambient Temperature
0 – 40 °C
Operating voltage
100 V AC – 240 V AC, 50 – 60 Hz, Switching power supply
Relative Humidity
< 80% (non-condensing)
Power consumption @ full load
1900 W
482 mm
89 mm
320 mm
7,9 kg
19″ / 2 U, Active Power Factor Correction, DSP controlled


LD systems

The same passion that takes hold of a musician on stage is what the engineers and designers at LD Systems® place into our products. These are not only sound technology specialists, but also sound technology enthusiasts, who passionately work out every detail until the sound and design meet the highest of standards.

Extra informatie

Gewicht 10 kg


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