LD Systems DS 21 – 19″ DSP Controller 3-channel

LD Systems DS 21 – 19″ DSP Controller 3-channel

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The LD DS2.1 is a universal 3-channel DSP controller for 2.1 loudspeaker systems with 24-bit processing and convenient front panel operation providing easy setup and high quality audio performance.

Designed for live sound and fixed applications the rack mountable unit offers extensive parameter control of its EQ, crossover, delay and limiter functions. The LD DS2.1 features a 3-band parametric EQ with adjustable Q and high shelf / low shelf selection. The crossover includes Butterworth, Bessel and Linkwitz-Riley filters with 6 dB to 24 dB slopes. Delay time is adjustable to a maximum of 12.5 ms for each of the three outputs and the limiter provides independent threshold and hold time setting for the L / R and subwoofer channels.

A backlit 2 x 16 LCD and jog wheel allow for quick parameter adjustment and recall of up to 6 presets. Also provides real time level meter. The rear panel features XLR connectors for left and right input, left and right plus sub XLR outputs and a USB port. Software and a power cord is included.

Product type
Signal Processors



AD/DA converter
24 bit

Sampling frequency
48 kHz

Frequency response
20 – 20.000 Hz

Filter type
Bessel , Butterworth , Linkwitz-Riley

max. 12.5 mS

Filter slew rate
12 dB/oct , 18 dB/oct , 24 dB/oct , 6 dB/oct

Dynamic range
> 100 dB

Signal-to-noise ratio
87 dB

0.005 %

> 80 dB

Max. input level
+ 13 dBu

Max. output level
+ 13 dBu

Input impedance (kOhms)
22 kOhm

Output impedance
300 Ohm(s)

Edit , Parameter , Power , Recall

multifunction LC display

Line inputs

Line input connectors

Line outputs

Line output connectors
XLR (balanced)


Mains connector
IEC socket

Operating voltage
90 V AC – 250 V AC, 50 – 60 Hz

482 mm

44.5 mm

160 mm

1,8 kg


Paino 1,8 kg (kilogramma)


LD Systems

About LD Systems

Pro Audio in Motion

Designed in Germany, heard around the world!

Within just a decade LD Systems® has become a major pro audio brand with an extensive range of product lines. The expert LD engineering team and highly motivated personnel are continuously engaged in creating advanced, state-of-the-art audio equipment that provides superior sonic performance and exceptional value. Designed in Germany, LD Systems® professional audio products deliver world-class sound around the globe.

LD Systems® is a registered brand of the Adam Hall Group with headquarters near Frankfurt am Main, Germany. Established more than 35 years ago, the company has built a solid reputation for quality products, outstanding customer service and being a dependable partner in the pro audio, events and MI industries. The Adam Hall® Group's rigorous standards and dedication to innovation are reflected in each and every LD Systems® pro audio product.