CRMS-LFE18 - large-format reference subwoofer

  • Reference-quality LFE subwoofer system
  • Extended in-room frequency response down to below 10 Hz
  • Superb impulse response for most realistic sound experience
  • Single 18” extreme-excursion woofer with dual 3” voice-coils
  • SIS™ pre-wired for very high system damping factor (10.000)
  • Available in space-economic design, with 27,5cm/10.8” depth

Product description

The CRMS-LFE18 is a large-format reference subwoofer system for very demanding listening applications, delivering a super accurate bass and sub response for a maximum quality audible and sensible performance.

Specific attention has been paid to obtain a linear response in the operating bandwidth, while handling ultra-low frequency transients with maximum control.

The 18” custom-designed woofer features a large motor structure with dual 3” voice-coils offering an extreme excursion of 30 mm / 1.2-in. resulting in a 10 dB more excursion capability than a traditional (pro) 18” woofer. (not included in SPLpeak spec).

The direct-radiating transducer mounted in the internally-stiffened, sealed cabinet enables an in-room response below 10 Hz; The superb impulse response is a perfect match with the ultra-fast transient response of the Alcons pro-ribbon systems. The 4 ohms impedance caters for maximum amplifier efficiency.

For full system performance, the CRMS-LFE18 is to be driven and controlled by the ALC amplified loudspeaker controller; Driven by the ALC, the CRMS-LFE18 delivers maximum sound quality and output power with long-term operation reliability.

The integrated factory presets in the drive processor of the ALC offer optimisation settings, as well as VHIR™ processing for perfect phase-matching with an Alcons pro-ribbon system.

The Signal Integrity Sensing™ pre-wiring ensures complete cable/connector compensation between the CRMS-LFE18 and ALC, significantly increasing response accuracy and reducing both linear and non-linear distortion to an absolute minimum, regardless of cable length and system impedance.

The combination of CRMS-LFE18 and ALC delivers the most accurate reproduction for even the lowest octaves, to bring the most realistic experience of speech, music and effects, as it was intended.

The CRMS-LFE18 is also available in a slim enclosure (“CRMS-LFE18sl”), for maximizing space-efficiency with the Alcons slim-sized main systems.

Typical applications include LFE system for quality-conscious post-production facilities and mastering suites, high-end mix/screening rooms, recording studios and premium home theatres.

Dimensional drawing

Technical specifications

Frequency response 30 Hz -    (+/- 3 dB)
21 Hz -    (+/-10 dB)
100 dB SPL boundary frequency 11 Hz
Sensitivity nominal 88 dB (40 Hz - 100 Hz)
Nominal impedance   4 ohms
Recommended drive Sentinel3 min., max. 2 pcs. per ch. (2 ohms)
Nominal SPL peak 117 dB (Sentinel3 40 Hz - 100 Hz)
122 dB (Sentinel10 40 Hz - 100 Hz)
Dispersion H x V omni

Physical specifications

System   subwoofer, front-loaded
Drivers LF   1x AW18.32-4 18” sealed
Connectors   2x Speakon NL4 input/link
Physical dimensions   mm        inches
Height   733          28.9
Width   800          31.5
Depth   450           17.7
Weight (approx.)   58 kg    127.9 lb
Warranty   6 years limited

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