Extraordinary cost-to-efficiency ratio



Line array element for mid and high frequency reproduction
Ideal as the main system for theatres, medium-size festivals (up to 60 m) and indoor sports venues
Enormous SPL in spite of its small form factor with an horizontal coverage of 120°
Full compatibility with Superfly, it can also be used as delay, side-fill or down-fill for bigger systems (GTO and C-12)
Equipped with a 3″ compression driver coupled with a D.P.R.W.G. wave guide
120° horizontal coverage


Mantas 28 is one of the most recent Vertical Line Array element designed by Outline. Thanks to the great experience accumulated with Butterfly – the Outline system with the same fundamental components and characteristics – Mantas 28 offers leading edge performance from a cabinet that is extraordinarily compact and lightweight.

Its top-grade components – two 8-inch midwoofers with Neodymium magnets and a 3-inch compression driver loaded with the well-known D.P.R.W.G. – ensure absolutely insignificant distortion levels and greater reliability.

In simple operational terms, Mantas 28 can best be described as a ‘compact, medium throw’ line-source system, delivering exceptional intelligibility, headroom and power up to around 60 metres depending on location and configuration. Many systems can make the same claim in terms of performance, but very few achieve these results from an enclosure which is so small and light in weight.

In recent years the developmental race in line-source systems has been all about output and coverage relative to size. Mantas 28 leads this race by utilising the same key audio technologies as its larger siblings but in a super-compact enclosure whose audio performance seems at first to be simply impossible given the size of the loudspeaker. But it IS possible – with Outline’s unique designs, top quality components and world-class audio engineering.

Along with suitable low-frequency elements, Mantas 28 can be the core component of a flexible sound reinforcement system able to handle a huge range of projects with ease. Loud enough for rock ‘n’ roll, but with the detail and intimacy necessary for theatre, Mantas 28 is the perfect solution not only for busy mobile sound operators but permanent installation in multi-purpose venues. Its design and adaptability also makes it perfect for cross-rental as it is ideal for use as side-fills, delays or side-hangs in much larger Outline (and other) systems.


Frequency Response (-10 dB) 90 Hz – 18 kHz
Horizontal Dispersion 120°
Vertical Dispersion Array design dependent
Splay Angles available from 0° to 7.5° in 0.5° step with additional 0.25° position
Operating configuration Bi-amplified
Impedance Midrange (Nom/Min) 8 Ω / 6.4 Ω
Impedance High (Nom/Min) 8 Ω / 8.4 Ω
Watt AES Midrange (Continuous/Peak) 400 W / 1600 W
Watt AES High (Continuous/Peak) 110 W / 440 W
Maximum SPL Output, one box * 139 dB SPL
Maximum SPL Output, four boxes * 151 dB SPL
* calculated using +10 dB Crest Factor signal @ 1 m, Free Field


Component Midrange 2 x 8” NdFeB partially horn loaded mid woofer
Component High 1 x 3” diaphragm NdFeB compression driver, DPRWG loaded
Connectors 2 x NL4 in parallel
Cabinet Material Baltic birch plywood
Cabinet Finish Black polyurea coating
Grill Epoxy powder coated
Rigging Integrated high-load aluminum hardware
Height 278 mm – 11”
Width 756 mm – 29 3/4”
Depth 518 mm – 20 3/8”
Weight 24 kg – 52.9 lb


MANTAS 28 Brochure

Nov 2016

SUPERFLY – MANTAS 28 Rigging Manual

Oct 2022

SUPERFLY – MANTAS 28 User Manual

Oct 2022

MANTAS 28 Architectural Specifications

Nov 2019

MANTAS 28 Recommended System Design

Sep 2023

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