Compact, highly versatile enclosure
High fidelity, Impressive output for size
3 Horn Patterns
2-way passive enclosure
LF extension with SB115i, SB112i, M118


The RMS-Acoustics C8 platform is a coaxial loudspeaker system designed to deliver output levels comparable to the highest output conventional premium 2-way systems, with superior pattern controldirectional consistency and a precise transient response that only a coaxial loudspeaker can provide. 

The C8 features an advanced high frequency waveguide that also acts as a phasing plug for the 8” cone loudspeaker. The horn is quite large for its size, yielding consistent pattern control and a low crossover point. The phasing plug improves the response of the cone loudspeaker minimizing the equalization and phase correction needed, thus aiding the transition between sources over the crossover band.

Its distinct enclosure design and comprehensive range of accessories make it an excellent choice for rapid deployment to almost any application, from stage monitoring, to front fills, to permanent installation.

The C8 delivers impressive SPL output, yeilding highly capable sound reinforcement from a compact and versatile package. Its impressive fidelity makes it perfectly compatible with the larger C12, M12X, M15X, and LA28 loudspeaker systems.

The C8 cabinet features an impact resistant polyurethane paint finish, and an integrated handle. The loudspeaker system is available as weatherized (-X) or in white (-W) or custom colors (-C). The weatherized option provides and IP54 rating.


Frequency Range (-10dB) ^1 65 Hz - 20 kHz Assumed 70 Hz High pass filter 0dB point taken at 1000 Hz, Processed
Frequency Response (+/-3dB) 78Hz - 18 kHz Assumed 100 Hz High pass filter 0dB taken at 1000 Hz, Processed
System Sensitivity (1w, 1m)^2 96dB Measured on LF band, average SPL over 300 to 1 kHz region. HF Sensitivity significantly higher
Maximum SPL Continuous (1m) 121dB


100 Hz - 18 kHz

65 Hz - 20 kHz

Maximum SPL Peak (1m) 127dB


100 Hz - 18 kHz

65 Hz - 20 kHz

Long Term Power Rating (IEC)^3 FR 300W, 600W, 1200W (Continuous, Pgm, Peak)
Long Term Power Rating (AES)^4 FR 600W (2400W Peak), 2 hrs, 400W 100Hr
Nominal Coverage Pattern 120° X 60°, 90° X 55°, 90° X 90°, rotatable in 22.5 deg increments, -6dB Isophase
System Crossover 1500 Hz with Traditional IIR, Proprietary, though around similar region FIR
Transducer SPKR-8-0002 Full Range Coaxial Driver, 8” Neodymium Coaxial Cone Loudspeaker
Input Connectors Dual Neutrik NL4MP Connectors
Enclosure Materials 15 and 18mm Birch Hardwood Ply 1.3mm layers
Grille Materials Aerospace Aluminum, Hexagonal pattern, Epoxy powder coat, Acoustically transparent black foam backing
Finishes Black finish (Standard) Polurethane textured spray
Additional Finishes available - See Options Below
Suspension and Mounting Proprietary internal, captive rigging
Rigging Hardware C8B Horizontal U Bracket specific to C8, ordered separately
WM-S RMS-ACOUSTICS wall mount small, ordered separately
WM-M RMS-ACOUSTICS wall mount medium, ordered separately
Dimensions 9.25” w x 12” d x 11” h  (241 mm x 305 mm x 280 mm)
Weight 22 Lbs (10 kg) Net
 Ordering Options C8,  -B (Biamplified, no crossover)
Finish Options -X1 (Weatherized), -W (White), -C (RAL Custom Color) Upcharge applies
Optional Accessories STAND1 Loudspeaker stand adapter 35mm
EYEBOLT 1/4-20 1/4-20 Eye Bolt Suspion Eye
C8B U Bracket for C8
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 6dB 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.


C8B C8 specific u bracket, for horizontal or vertical installation, black, ordered separately
WM-S RMS-ACOUSTICS wall mount small, ordered separately



C8 Datasheet