CRMS-SR - Reference surround for CRMS

  • RBN401 pro-ribbon HF driver, 8” vented Neodymium woofer
  • Signal Integrity Sensing™ pre-wired cable compensation
  • ‘Real-90’ dispersion, H 90° x V 40° (nom.)
  • 10° slanted baffle for optimised projection
  • Choice of 2 impedance versions: 4 ohms (immersive) or 8 ohms (5.1/7.1)
  • Available in any color through the ACO™ RAL color option scheme

Product description

The CRMS SR surround is a 2-way passive-filtered full range loudspeaker, designed to meet all requirements of current and future cinema surround sound formats.
Featuring the patented Alcons pro-ribbon driver technology, the CRMS SR surround combines an exceptional clarity and intelligibility with an unusually high dynamic range, offering the most realistic sound reproduction possible.

The CRMS SR system consists of one RBN401 pro-ribbon driver for HF and a vented 8” mid-bass for LF reproduction. The CRMS SR HF section has an 800 W peak power input, enabling a 1:16 dynamic range with up to 90% less distortion from 1 kHz. to beyond 20 kHz.
The patented horizontal dispersion of the RBN401 offers a stable coverage to a larger number of seats in the auditorium; Due to the “compression-less” principle of the pro-ribbon transducer, the system has a linear response at any SPL.

The CRMS SR is designed as matching surround system for the CRMS system: By utilizing identical MHF components, a perfect voicing matching between screen- and surround system is realized, resulting in an exceptionally wide and uniform sound stage throughout the entire listening area.

The 10-degree slanted enclosure baffle together with the optional grill and ACO™ color option, provides for easy, low profile wall mounting.

For full system performance, the CRMS SR needs to be driven by an ALC controller-amplifier, delivering maximum sound quality with increased headroom and utmost operation reliability.

The Signal Integrity Sensing™ pre-wiring ensures complete cable/connector compensation between the CRMS SR and ALC, significantly increasing response accuracy, regardless of cable length and system impedance, with tight and accurate mid and bass response as result.

Typical applications include surround sound system for premium Home Cinemas, high-end mix/screening rooms, quality-conscious post-production facilities and dubbing stages. As a result of Alcons’ tight manufacturing standards, all system cabinets are within “matched pair” tolerance.

Dimensional drawing

Technical specifications

Frequency response 74 Hz - 20.000 Hz (+/- 3 dB)
58 Hz (+/- 10 dB)
Sensitivity nominal 103 dB (200 Hz – 10 kHz)
Nominal impedance 4 ohms or 8 ohms
Recommended drive Sentinel3 min., max. 3 pcs. per channel (2.7 ohms)
Nominal SPL peak 129 dB (Sentinel3 200 Hz - 10 kHz)
134 dB (Sentinel10 200 Hz - 10 kHz)
Dispersion H x V H 90° (@ 20 kHz) x V 40° (line-source)

Physical specifications

System 2-way, full-range
Filtering passive
Driver LF 1x AMB8 8”, vented
Driver HF 1x RBN401 4” pro-ribbon driver
Connectors 2x Speakon NL4 input/link
Physical dimensions  
Height 455 mm / 17.9 inch
Width 469 mm / 18.5 inch
Depth 178 mm / 7.0 inch
Weight (approx.) 13,2 kg / 29,1 lb
Warranty 6 years limited

Stay Tuned

Subscribe to the Alcons newsletter and stay tuned