CR4 - Large-format screen system

  • Triple RBN401 pro-ribbon HF driver, quad 6.5” midrange and double 15” woofer
  • Unique HF array for extended throw / coverage compensation
  • Adjustable MHF waveguide with 10-degree pre-tilt for easy projection
  • Shallow system design (35cm/13.7”) for space economic mounting
  • Signal Integrity Sensing™ pre-wired cable compensation
  • Bi-amp filtering for economical powering or tri-amp filtering for maximum output

Product description

The CR4 is a 3-way sound system, designed to meet all requirements of current and future (Digital) Cinema sound formats.
Featuring the patented Alcons pro-ribbon driver technology, with triple RBN401 pro-ribbon HF driver array, the CR4 is designed for applications where high output with maximum quality cinema sound reproduction is needed. It is recommended for 300-500 seat theatres.

By implementing line-source technology throughout the entire system (an industry first), the normal (-6dB step) reduction of SPL coverage from front to rear is reduced; this “proximity” effect dramatically improves the cinema experience for the audience further away from the screen. The precise projection also prevents unwanted ceiling reflections.

The CR4 HF section has a 2400W peak power input, offering a 1:16 dynamic range with up to 90% less distortion from 1kHz. to beyond 20kHz. The patented Real-90 horizontal dispersion widens the stereo experience for far left and right seated audience.

The CR4 is available with bi-amp filtering for economical powering or tri-amp filtering for maximum system output.

The SignalIntegritySensing™ pre-wiring ensures complete (long!) cable/connector compensation between CR4 and ALC, significantly increasing response accuracy and further reducing distortion. The (industry’s most) shallow enclosure design of only 35cm/13,7” provides for flexible mounting, claiming only a minimum of space behind the screen.

For full system performance, it is strongly recommend using the CR4 in combination with an ALC amplified loudspeaker controller. Driven by the ALC, the CR4 delivers maximum sound quality with increased headroom under dedicated equalisation and inaudible (power and excursion) protection.

Dimensional drawing

Technical specifications

Frequency Response  
+/- 3 dB   43 Hz - 20.000 Hz
+/- 10 dB   32 Hz
Sensitivity (SPL 1W/M) nominal LF   100 dB / 100 dB
MF   106 dB / 108 dB (tri-amp)
HF   104 dB / 106 dB (tri-amp)
Nominal Impedance LF   4 Ohm
MF   4 Ohm (tri-amp)
HF   4 Ohm (tri-amp)
MF/HF   4 Ohm (bi-amp)
Maximum RMS / peak LF   2000 / 8000 Watt
MF   720 / 1600 Watt
HF   150 / 2400 Watt
SPL program/peak LF   133 / 141 dB
MF   137 / 140 dB
HF   128 / 140 dB
Dispersion H x V   90° x 36°
down to 250 HZ

Physical specifications

System 3-way, full-range
Filtering   LF active, MF/HF passive
Drivers LF   2 x AW15.4 15”, vented
Drivers MF   4 x AM65ND 6.5”
Drivers HF   3x RBN401 4” ribbon
    driver
Cross-over frequencies   250 Hz and 1000 Hz
Connectors   2 x Speakon NL4 input
Physical dimensions   mm            inches
Height   2366          93.1
Width   750            29.5
Depth   350            13.8
Weight (approx.)   105 kg       (231.5 lb)
Warranty   6 years limited

Stay Tuned

Subscribe to the Alcons newsletter and stay tuned