QRP20/90 - full range point source column

  • Point-source column with high-Q directivity for increased projection control
  • RBN401 pro-ribbon HF driver with exceptional intelligibility and “throw”
  • 1:1 non-compressed linear sound reproduction, with up to 90% less distortion
  • Fully symmetric and coherent horizontal and vertical pattern control
  • Woofers with Active Coil™ technology for further reduced LMF distortion
  • SIS™ pre-wired for very high system damping and further reduced distortion

Product description

The QRP20/90 is a 2-way column loudspeaker to be used as vertical sound system, for both permanent and portable applications. Its slim design packs a perfectly natural, dynamic sound reproduction with superb intelligibility, coverage and throw.

It is specifically designed for applications where ultimate fidelity response needs to be projected with very wide horizontal and narrow vertical coverage, ideal in acoustically challenging environments, or applications where intelligibility-over-distance is required.

Loaded with the RBN401 4” pro-ribbon driver on a “Morpher” lens, the system offers an exceptional, SPL-independent throw-efficiency and projection control, due to the pro-ribbon’s all-natural cylindrical (isophasic) wavefront. The patented (120-degrees) horizontal dispersion offers a very wide and consistent audience coverage up to the highest frequencies.

Its fast impulse response, “compression-less” principle and unusual high peak power handling (800W @ 200ms) cater for a perfect intelligibility from the lowest to the highest SPL with a 1:15 dynamic range, while offering a maximum “gain-before-feedback”.

The RBN401 driver is mounted in a D’Appolito speaker configuration with four woofers in a sealed cabinet. The custom-design 5” woofers feature Active Coil™ technology for extremely low-distortion LF reproduction, a perfect match with the pro-ribbon technology.
The frequency response roll-off enables an excellent partnering with an additional subwoofer.

The system brings the unsurpassed clear, dynamic and ultra-low distortion Alcons signature sound in a very slim and unobtrusive package; The M10 mounting points on top and bottom and the M6 universal mounting bracket pattern on the back, together with the optional ACO™ color scheme provides for an inconspicuous, low-profile presence in any application.

The QRP20 is powered and controlled by the ALC amplified loudspeaker controller; Through the integrated VHIR™ processing, audiophile amplifier stages and Signal Integrity Sensing™ feedback circuit, the ALC offers QRP20-specific drive processing, delivering absolute maximum sound quality with increased headroom and utmost operation reliability and flexibility.

The QRP20 is available in two versions with 90-degree (QRP20/90) and 120-degree (QRP20/120) horizontal dispersion.

Dimensional drawing

Technical specifications

Frequency response 72 Hz - 20.000 Hz (+/- 3 dB)
64 Hz                        (+/- 10 dB)
Sensitivity nominal 99 dB (200 Hz - 10 kHz)
Nominal impedance 4 ohms 
Recommended drive Sentinel3 min.
Nominal SPL peak 128 dB (Sentinel3 200 Hz - 10 kHz)
133 dB (Sentinel10 200 Hz - 10 kHz)
Dispersion H x V 90° x 15° (@ 20 kHz)

Physical specifications

System 2-way, full-range
Filtering passive
Driver LF 4x AMB5NDAIC-16 5”, sealed
Driver HF 1x RBN401 4” pro-ribbon driver
Connectors 2x Speakon NL4 input/link
Physical dimensions  mm                 inches
Height 742                   29.2
Width 150                     5.9
Depth 150                     5.9
Weight (approx.) 12 kg                26.9 lb
Warranty 6 years limited

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