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LD Systems
DSP 45 K

4-Channel Power Amplifier with DSP

DSP 45 K

Price on request

Item No.:
24 Months
  • 4-channel power amplifier with DSP control
  • 4 x 1200 watts @ 4 and 2 ohms, 2 x 2400 watts bridged @ 4 ohms
  • 10 Hz - 22 kHz frequency response with 120 dB dynamic range
  • 24-bit/48kHz DSP with FIR and IIR filters, parametric EQ, crossover, delay, RMS and peak limiters
  • DC, overcurrent, thermal and short circuit protection, soft start, clip and SMPS overload limiters
  • Dual temperature-controlled fans
  • Power factor correction...
Read on
DSP 45 K
DSP 45 K
4-Channel Power Amplifier with DSP

Price on request



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
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
Power supply
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


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.


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User's manual

Category: Manual

Type: pdf

File size: 5 MB

Software user's manual

Category: Data Sheet

Type: pdf

File size: 6 MB

Loudspeaker Presets

Category: Software

Type: zip

File size: 665 KB


Category: Software

Type: zip

File size: 10 MB

Tender documents

Category: Tender Specifications

Type: zip

File size: 162 KB

LD Systems Catalogue

Category: Catalog

Type: pdf

File size: 38 MB

Production Partner DE

Category: REVIEW

Type: pdf

File size: 2 MB

Item images

Category: Product images

Type: zip

File size: -

File size
User's manual Manual pdf 5 MB
Software user's manual Data Sheet pdf 6 MB
Loudspeaker Presets Software zip 665 KB
OCS-Software Software zip 10 MB
Tender documents Tender Specifications zip 162 KB
LD Systems Catalogue Catalog pdf 38 MB
Production Partner DE REVIEW pdf 2 MB
Item images Product images zip -
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