Two-and-a-half way acoustic design



ARENA range addresses acoustically challenging environments such as sports stadia, arenas and other very large spaces used for major public gatherings
140 dB SPL peak
2 x 15” woofers, bass reflex loaded plus coaxial 3” diaphragm compression driver which can be driven by a single amplifier channel or bi-amped
Precise directivity coverage (80° x 60°) with rotatable HF horn
Finished with the exclusive ‘outSIDE’ coating, featuring amazing durability and superior physical properties with IP55 protection
Various rigging options via included Smart Fix Rail System, multiple M8 points and 35mm pole mount


Arena 215CX is a full-range, two-and-a-half-way bass reflex enclosure equipped with a modern premium custom coaxial driver. Arena 215CX enclosures integrate perfectly into stadium installations with Stadia Series units, providing seamless audio throughout areas not covered by the main system. This loudspeaker also provides extremely effective multi-purpose solutions in any application where high quality audio needs to be distributed around outdoor areas, such as theme parks, leisure facilities, tourist attractions and public spaces.

Outline’s high quality coaxial driver gives excellent sonic performance, increased timbre quality and high power handling characteristics. It is loaded by a proprietary moulded waveguide, which is coaxial to the 15” mid-woofer and provides low-pass acoustical loading on the woofer, increasing the efficiency in its usable bandwidth. Uniquely configured as a ‘two-and-a-half’ way system both electrically and acoustically, Arena 215CX delivers audio performance approaching a three-way design with extended low frequency, outstanding sound quality and remarkable SPL. Thanks to Outline’s exclusive internal crossover designs, the enclosure can be driven by a single channel of amplification, while it is also possible to use two amplifier channels to drive the low and coaxial sections separately.


Nominal Dispersion 80° x 60° (H x V)
Continuous SPL Output * 130 dB SPL
Maximum SPL Output * 140 dB SPL
Frequency Response -10 dB 50 Hz – 20 kHz
Operating configuration Mono-/Bi-amplified
Impedance Low (Nom/Min) 8 Ω / 6.8 Ω
Impedance Coaxial (Nom/Min) 8 Ω / 7.2 Ω
Watt AES Low (Continuous/Peak) 600 W / 2400 W
Watt AES Coaxial (Continuous/Peak) 500 W / 2000 W

                                                                                    * calculated using +10 dB Crest Factor signal @ 1 m, Free Field


Component Low 1 x 15” bass-reflex loaded woofer
Component Mid-Low (coaxial) 1 x 15” bass-reflex loaded woofer
Component High (coaxial) 3” coaxial rotatable moulded horn-loaded compression driver
Connectors 8 Pole parelled barrier strip
Cabinet Material Baltic birch plywood
Cabinet Finish WP elasto-plastic coated
Grille Epoxy powder coated
Installation Points 11 x M8 threaded points
Smart Fix Rail system
Pole mount 35 mm socket
Handles 8 handles
Height 940 mm – 37”
Width 480 mm – 18 7/8”
Depth 480 mm – 18 7/8”
Weight 42 kg – 92.6 lb


STADIA Series Brochure

Mar 2022

ARENA 215CX Architectural Specification

Oct 2021

ARENA 215CX User Manual

Apr 2023

Arena 215CX 2D Drawings

Arena 215CX 3D Drawings

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