Compact, incredibly high output 144dB, 3 way enclosure point source enclosure
Dual 12"LF + Dual Coaxial MF/HF, LF extension down to 44Hz (-dB)
Consistent Pattern control down to 400Hz
70H x 50V degree directivity, optional 90x55 and 120x60
2-way biamp enclosure, passive MF/HF


The RMS-Acoustics C24X is a unique ultra high performance coaxial loudspeaker system designed to deliver superior output levels that exceed conventional premium 2-way systems, with superior pattern control, directional consistency and a precise transient response that only a coaxial true point source loudspeaker can provide. This is accomplished via a large horn coupled with a dual diaphragm full range compression driver operating from 400hz up to 22kHz. A dual 12” low frequency loudspeaker pair extends the low frequency down to 44Hz. This is accomplished by being mounted in a separate, optimally sized and vented enclosure within the same cabinet. The result is a true full bandwidth, incredibly high output, low distortion loudspeaker delivering unparalleled dynamics in a versatile and manageable size.

The C24X features an advanced high frequency wave-guide that also acts as a phasing plug adding damping load to the 12” cone loudspeakers. The horn is quite large, yielding consistent pattern control down to 400hz and facilitating a low crossover point. The phasing plug improves the response of the cone loudspeakers, minimizing the equalization and phase correction needed, thus aiding the transition between sources over the crossover band. The built in MF/HF passive crossover has a protection circuit built in.

The enclosure of the C12XXL features a 40° trapezoidal angle to allow close mountings to walls or ceilings, with little to no impact on sight lines. Its tailor-able pattern control, easy mounting and array ability with RMS-Acoustics array brackets allow a simple, cost effective method to tailor a sound reinforcement solution to achieve the best possible acoustical results in almost any space. Optimized nonlinear venting improves the low frequency impedance compared to conventional enclosures, while maintaining better mechanical cone control when low frequency extension is required. The result is tight, punchy bass and a low frequency extension not achievable by traditional 2-way enclosures.

The C24X cabinet is crafted from premium multi-ply birch with a finely textured polyurethane finish that is impact and UV resistant. A powder-coated, punched and laser cut steel grille protects the cabinet internal from the elements. Full weather protection and custom color finishes are also available. The weatherized option provides and IP54 rating.

The optimum processed amplifier solution for the RMS-Acoustics C12XL are the RMS-ACOUSTICS series of processed and network managed amplifiers. The Linea Research C and M series amplifiers, with proprietary presets provided by RMS-ACOUSTICS are also supported.


Frequency Range (-10dB) ^1 38 Hz - 22 kHz
Frequency Response (+/-3dB) 44 Hz - 19 kHz
System Sensitivity (1w, 1m)^2 111dB Measured on MF/HF band, average SPL over 400 to 4 kHz region.
Maximum SPL Continuous (1m) 138dB 70 X 50

136dB 90 X 55

134dB 120 X 60

Maximum SPL Peak (1m) 144dB  70 X 50

142dB  90 X 55

140dB  120 X 60

Long Term Power Rating (AES)^4 LF


2000W (5600W Peak), 2 hr, 1600W 100Hr

200W   (1100W Peak), 2 hr, 160W 100Hr

Nominal Coverage Pattern 70° x 50°

90° x 55°

120° x 60°

System Crossover 400 Hz electronic IIR w/ all pass and FIR phase correction, 3300 Hz MF/HF analog, Proprietary system FIR overlay
Transducers SPKR-12-0008








LF, Passive MF/HF

LF Driver - 12” cone loudspeaker with 3.5” voice coil, shorting ring and high performance convective cooling technology


MF/HF Coaxial Driver


MF Diaphragm Replacement for SPKR-CX-001 -- MUST BE REPLACED AT FACTORY


HF Diaphragm Replacement for SPKR-CX-001 -- MUST BE REPLACED AT FACTORY


Impedance - 8 Ohm,  8 Ohm

Input Connectors Dual Neutrik NL4MP Connectors
Enclosure Materials 15 and 18mm Birch Hardwood Ply 1.3mm layers
Grille Materials Cold Rolled steel, Epoxy powder coat, Acoustically transparent black foam backing
Finishes Black finish (Standard) Polyurethane textured spray
Additional Finishes available - See Options Below
Suspension and Mounting Proprietary internal, captive rigging
Dimensions 14.0” w x 32.3” h x 18” d  (356 mm x 821 mm x 458 mm)
Weight 95 Lb (43.2 kg) Net      107 Lb (48.7 kg) Shipping
Finish Options -X1 (Weatherized), -X2 (Weatherized), -W (White), -C (RAL Custom Color) Upcharge applies
Optional Accessories & Rigging Hardware C12XXL-HU


Horizontal U Bracket specific to C12XXL

Vertical Bracket specific to C12XXL, can facilitate pole use

WM-XL RMS-Acoustics XL wall mount with lateral orientation and vertical tilt
Free field, semi anechoic conditions.  To compare with half space measurements, add 6dB to maximum output specifications.
1. Full Space, 4pi conditions
2. Measured Maximum SPL, based on power compression observation of 3dB
3. IEC Shaped pink noise with 12dB Crest Factor
4. AES Standard AES2-2012, one decade pink noise with 6dB Crest factor within device’s applicable operating band, free air. Standard AES 2 hr rating are specific for low frequency transducers.