RCF HDL 20-A Active Line Array Module

The RCF HDL 20-A The careful acoustic design, no compromise transducers and a unique, composite cabinet, design make the HDL 20-A the preferred tool of many professionals.

Perfect in live sound reinforcement and reliable installed situations.

RCF HDL 20-A Active Line Array Module

The HDL 20-A is the ideal choice when line array performance is needed and a fast and easy set up is a must. The system is powered from a 1400 Watt Peak Power 2 way digital amplifier, sound is processed from a powerful DSP. The processing includes cluster and HF projection correction and special new presets for indoor and high curving situations. The system features state of the art RCF transducers, two powerful 10" for a solid bass reproduction and a large format 3" voice coil compression driver to deliver vocal clarity and high definition with an incredible dynamic.

RCF HDL 20-A Active Line Array Module Back Panel


RCF HDL 20-A Active Line Array Module ports details

  • 1400 Watt Peak power - 700 Watt RMS
  • 135 dB max SPL
  • 55 Hz 20 kHz frequency response
  • 2 x 10" Woofers
  • 1 x 3" Compression Driver
  • DSP controlled Input section with selectable presets
  • Tour grade safe and solid variable mechanics
  • Composite PP enclosure structurally wooden reinforced


  • Live sound
  • Rental
  • Portable PA, clubs, ballrooms, live theatre
  • House of worship
  • Theme parks
  • Music playback and sound reinforcement in small and mid-size venues
  • Corporate A/V professionals and sound system hire companies

Amplification & Set up


The HDL 20-A is powered by a 1400W peak power digital amplifier, split 200W for the HF and 500W for the LF. A new generation DSP handles all the processing within the cabinet and allows adjustment of Cluster size and HF projection. The DSP also includes presets for indoor/outdoor usage and highly curved arrays. All these setting are accessed by the buttons on the rear of the cabinets.

The easy to access controls on the back of the speaker allow a number of simple optimisations to be carried out at the flick of a switch: two possible HF settings, four possible cluster configurations; a special EQ setting for high curved configurations and an Indoor Correction EQ.




The system accept female XLR input connectors and line level signals from a mixing console or other signal source.


The output XLR male connector provides a loop trough for speakers daisy chaining.

Volume knob

Volume knob

Controls the volume of the power amplifier. The control ranges from - (maximum attenuation) to the MAX level (maximum output).

Status indicators

Status indicators


Power on indicator. When the power cord is connected and the power switch is turned on this indicator lights green.


The signal indicator lights green if there is signal present on the main XLR input.


The amplifier has a built in limiter circuit to prevent clipping of the amplifiers or overdriving the transducers. When the peak clipping circuit is active the LED blinks orange. It is okay if the limit LED blinks occasionally. If the LED blinks frequently or lights continuously, turn down the signal level. The amplifier has a built in RMS limiter. If the RMS limiter is active the LED lights red. The RMS limiter has the purpose to prevent damages the transducers. The speaker shall never be used with the limit indicator red, continuous operation with the RMS protection active can cause damages to the speaker.

HF Switch

HF Switch

HF. The switch gives the possibility to set high frequencies correction depending on target distance (air absorption correction):

  • NEAR (used for pole mount applications or near field)
  • FAR (for farthest field).

Cluster Switch

Cluster Switch

The combination of the 2 switches gives 4 possibilities of mid low frequencies correction depending on cluster size.

  • 2-3 modules (used for pole mount applications ground stacking)
  • 4-6 modules (small flown systems)
  • 7-9 modules (medium flown systems)
  • 10-16 modules (maximum flown configuration).



The switch gives the extra possibility to boost mid frequencies depending on a high curving cluster configuration of few pieces.

  • OFF (not active correction)
  • ON (for high curving arrays of few pieces HDL20A).



The switch gives the extra possibility to set low frequencies correction depending on a indoor/outdoor use, in order to compensate room reverberation on lows.

  • OFF (not active correction)
  • ON (correction for reverberant indoor rooms).




RCF D LINE uses a POWERCON locking 3-pole AC mains. Always use the specific power cord provided in the package.


Use this receptacle to link one or more units. Always make sure that the maximum current requirement does not exceed the maximum admitted POWERCON current. In case of doubt call the closest RCF SERVICE CENTRE.


The power switch turns the AC power ON and OFF. Make sure that the VOLUME is set to - when you turn on the speaker.

RCF Shape Designer Software

In order to assist with the set up procedures for the HDL 20-A line array system, RCF has developed a complete prediction software package.

The software enables a complete two dimensional simulation of the behaviour of the HDL 20-A modules and also suggest the correct subwoofer combination.

The system curvature angles and the sound projection data are computed with maximum sound pressure levels for the given design.

The software will allow simulations up to a maximum of sixteen HDL 20-A systems.

The rigging menu provides data for weight, centre of gravity and length of the array configuration. Rigging points and rigging hardware configurations are also computed.

RCF Shape Designer Software Screen


Acoustical Specifications
Frequency Response -3 dB: 55 Hz ÷ 20 kHz
Max SPL : 135 dB
Horizontal coverage angle:  100°
Vertical coverage angle:  15°
Compression Driver:  2", 3.0" voice coil
Woofer: 2 x 10", 2.5" voice coil 
Input/Output Section 
Input signal:  bal/unbal
Input connectors:  XLR
Output connectors:  XLR
Input sensitivity: -2 dBu / +4 dBu
Processor Section 
Crossover frequencies: 1000 Hz
Protections: thermal, RMS
Limiter:  Soft limiter
Controls: Cluster, HF, High curving, Indoor
Amplifier Specifications
Total power: 700 W
High frequencies:  200 W
Low frequencies: 500 W
Connections:  Powercon in/out
Cooling: Convection
Cabinet Material:  Composite PP, wooden reinforced
Hardware:  Rigging flyware
Handles:  2 side, 2 back
Colour:   Black
Physical Specifications
Height: 294mm
Width:  705mm
Depth:  445mm
Net Weight:  29 kg

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