SUB 118

High-power sub-bass enclosure



Highly efficient, powerful low-frequency loudspeaker fitted with one 18″ transducer
Exceptional size-to-power ratio (142.5 dB SPL short-term peak @ 1 m)
Proprietary Outline design provides tremendous ‘punch’
Outline ‘E.R.P.’ (‘Energy Retentive Porting’) design assists airflow and enhances transducer efficiency
Finished with Polyurea, featuring amazing durability and superior physical properties
Conceived, designed and manufactured exclusively in Italy (as are all Outline products)


The SUB 118 enclosure is a high output sub-bass system equipped with one long-excursion 18” transducer. It is ideal for applications requiring super-powerful sub bass delivery, including live music and dance venues.
This focus and clarity not only enhances the reproduction of program material but also makes the most efficient use of amplifier power. This is a result of Outline’s proprietary ‘E.R.P.’ (‘Energy Retentive Porting’) design. Based on the principles of fluid dynamics and successfully applied to the science of controlling pneumatic forces within a loudspeaker enclosure, this unique arrangement of specially-shaped ports ensures an optimum airflow. This reduces internal turbulence, maximising the efficiency of the transducers and thus allowing more amplifier power to be converted into acoustic energy. Such a design requires high-precision manufacturing techniques, and Outline’s engineering team have applied some original production techniques to turn an exciting concept into a physical reality.


Frequency Response -10 dB 35 Hz – 800 Hz
Suggested Cross-Over max 120 Hz
Nominal Dispersion Quasi-Omnidirectional
Impedance (Nom/Min) 4 Ω / 3.4 Ω
Watt AES (Continuous/Peak) 1200 W / 4800 W
Maximum SPL Output * 142.5 dB SPL


Component 1 x 18” direct radiation woofer
Connectors 2 x NL4 Pins 1+/1-
Cabinet Material Baltic birch plywood
Cabinet Finish Black polyurea coating
Grill Epoxy powder coated
Installation Points 16 x M8 threaded points
Pole Mount 2 x M20 threaded points
Height 570 mm – 22 1/2”
Width 570 mm – 22 1/2”
Depth 750 mm – 29 1/2”
Weight 47 kg – 103.6 lb


SUB Series Brochure

Nov 2019

SUB Series 2D Drawings

SUB Series 3D Drawings

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