Since 1973 Outline have been applying that Italian passion and design flair to the science of designing loudspeaker systems and associated technologies. The roots of the company lie with founder Guido Noselli, who as a young musician was dissatisfied with the audio quality being delivered to his audiences. His ambition for sonic improvement coincided with the emergence of the disco scene of the mid-70s and the subsequent demand for powerful, full-range loudspeaker systems for the Italian ‘super clubs’ of the day. Outline was born.
Over the past 40 years, Outline has pioneered a number of products and technologies that enhance not only their own products but those of their contemporaries too. A good example is the ‘ET System’, a computer-controlled turntable which greatly simplifies the measurement of the polar dispersion characteristics of loudspeakers. Designed originally for in-house use only, this remarkable device (upgraded to the ET 250-3D in 2008) has since been purchased by many of the world’s best-known loudspeaker manufacturers as well as various universities, institutes and multinational companies working within the field of acoustics.
Similarly, Outline engineers developed and refined the Unimetal® concept for compression driver diaphragms. This process, unique to Outline, produces diaphragms which are extremely thin and light yet retain the necessary structural rigidity by incorporating the voice coil and suspension into a single component. They dissipate heat very quickly and are also extraordinarily efficient at converting electrical energy into acoustic output, resulting in a noticeably more natural and dynamic reproduction.
Outline’s headquarters in Brescia, near Milan in northern Italy, houses all the principal activities of the company. While many companies have moved some or all of their manufacturing offshore, all Outline products are still 100% manufactured in Italy.
Their dedicated R&D team includes professors and graduates in both acoustics and physics. Their deep theoretical expertise is balanced by the decades of hands-on experience of their colleagues, resulting in designs that combine valid acoustical theory with real-world practicality.
After 40 years, Outline remain absolutely committed to researching and designing professional tools that allow creative people to deliver their art to audiences of every size in any location.Visit Site
Outline’s concept for GTO is to produce a large format line-source loudspeaker system that is flexible, adaptable, easy to use and which provides audio performance that meets the demands of the most discerning engineers, rental companies and production managers.
GTO benefits from a process of natural evolution which retains the basic design principles, proven within the Butterfly project, and expands them into a new system which provides greater SPL, more control, improved resolution, faster transient response and unrivalled uniformity in long-distance projection.
One of the essential design elements retained from Butterfly is the V-shaped front baffle, for which Outline was awarded an international design patent. This ground-breaking design allows individual sound sources to be positioned, when coupled in an array, much closer together than in conventional line-source systems. This facilitates superior acoustical coupling between high-frequency modules thus producing a smooth yet extended HF response. It also creates the ideal ‘unbroken baffle’ shape through an array which minimises diffraction and deterioration of the mid-high frequencies, thus contributing to the far-field performance of the system.
GTO cabinets contain ten transducers in a compact cabinet with an internal volume of just 340 litres. It features four 3-inch diaphragm compression drivers, each loaded with our patented D.P.R.W.G., and whose combined output is channelled through a single output slot. Four 8-inch drivers produce the mid range frequencies, which are output via the same horizontal dispersion waveguide as the HF, and Two 15-inch cone transducers generate the low frequency range, providing tremendous depth.
The Outline GTO C-12 is a compact line-source enclosure designed to provide a flexible, powerful and almost infinitely configurable loudspeaker system for professional sound reinforcement applications. It has been developed in response to customer demand for a multi-purpose loudspeaker system that can be efficiently transported and deployed, but still produce the power, intelligibility and control necessary to handle a wide range of events and locations.
It is a direct descendent of the mighty GTO, a system which, since its launch in 2011, has wowed production managers and sound engineers all over the world with its combination of visceral power and precision coverage. GTO C-12 develops the high transducer density concept pioneered by GTO by packing eight drive units into a remarkably compact cabinet, containing two 12” low frequency drivers, four 6.5” midrange units and two 3”-throat compression drivers, mounted on the same award-winning DPRWG waveguide found in its big brother.
The C-12 cabinet is 21.6% smaller in the vertical plane than the GTO, while overall cabinet weight has been reduced by a remarkable 30% – in addition to some clever engineering, our use of a special aluminium alloy for the integral rigging hardware contributes to this major weight saving. This unique system also provides twelve different adjustment settings in the angle between connected GTO C-12 cabinets, adding further to the real-world flexibility and adaptability of the loudspeaker.
The GTO-DF is a proprietary ‘Down-Fill’ enclosure incorporating a newly-designed waveguide based on phased audio paths. It is engineered to provide exceptionally high quality sound to the first several rows of the audience at an event, filling the sonic gap often experienced by event attendees who are seated near the stage. With its downward oriented constant directivity horn with embedded acoustic lens, it is designed to reside on the bottom of a GTO array.
GTO-DF is mechanically identical to, and acoustically matched with, the GTO full-range cabinet, so it can be easily added to a flying array. Unique to the GTO-DF is a vertical dispersion range of zero-degrees to minus 25-degrees to ensure precision aiming of the sound into the audience and not onto the stage. The development of this acoustic lens has facilitated a much more compact design than is normally associated with products of this type. The proprietary waveguide offers 120-degrees of horizontal coverage from 315 Hz to 17.5 kHz.
The GTO-DF is intended for large-scale applications, as part of the GTO-turnkey solution.
The GTO-LOW is bass extension cabinet which features the same dual 15” drive units, physical dimensions and rigging hardware as the GTO cabinet. The reflex ports are also in the same configuration as GTO which preserves the low-frequency continuity of the array when cabinets are combined. This allows combinations of GTO and GTO-LOW to be deployed in a wide variety of ways depending on the application, venue and available space.
The GTO-LOW is designed to fulfil two main roles:
The GTO-SUB is a dual 18” subwoofer enclosure using phase inversion type loading, which, coupled with the use of several innovative loudspeaker technologies, allows it to deliver consistent performance at the highest levels over many years. The enclosure is tuned to a low frequency by way of a long port with a large surface area. This allows the GTO-SUB to obtain a wide passband and a considerable extension towards the bottom end of the frequency response. Analysis and careful design has completely removed the usual ‘port turbulence’ associated with traditional cabinets using this loading method.
The GTO-SUB is primarily intended for large-scale applications, as part of the GTO-turnkey solution. It is ideally suited to projects that demand no-compromise audio quality. The GTO-SUB addresses an increasing demand for accurate, high definition bass reproduction. This product is capable of outstanding electrical to acoustic power conversion but still within a compact package. The performance is aided by the careful choice of the reflex alignment and the construction of the cabinet. The GTO-SUB has a useable frequency range at -10 dB of from 28 Hz to 160 Hz, while the response is just +/-3 dB from 34 Hz to 107 Hz. The max sensitivity is 97 dB in free-field and 103 dB in half-space. The maximum continuous AES power of 2400 W gives 131 dB SPL in free-field and 137 dB SPL in half-space, while peak values can reach 147 dB SPL in half-space.
The C.D.H. 483 Hi-Pack is the Butterfly system’s element for mid-low, mid and high frequency reproduction. Weighing just 34 kg. the cabinet has an unmistakable shape which brings to mind the butterfly from which it takes its name, thanks to the triangular opening in the upper and lower “sides”. This original design solution favours the optimum coupling of array elements up to the highest frequencies, keeping the distance between the sources as short as possible and at the same time providing them with a continuous loading ‘baffle’.
The high frequency section of the Butterfly system is equipped with a 3” (1.41” throat) compression driver coupled with a D.P.R.W.G. (Double Parabolic Reflective Wave Guide) device geometrically based entirely on precise mathematic calculations to take a circular planar (flat) wavefront emitted by the source at its input (e.g. that of a compression driver) and transforming it into a rectangular planar wavefront at its output, keeping signal paths identical from every emission point of the source. The rectangular planar wavefront thus obtained can be loaded by an appropriate horn or waveguide to ensure the necessary coverage.
Four high-efficiency 8” mid woofers: two band-pass loaded (110 – 400 Hz) and two reflex high-pass (110 – 1250 Hz) loaded by the sides of a waveguide with a 90° dispersion angle are connected in parallel without any type of passive crossover, so can both be powered using one amplifier.
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.
The DBS 18-2 is a dual 18” subwoofer enclosure using phase inversion type loading, which, coupled with the use of several innovative loudspeaker technologies, allows it to deliver consistent performance at the highest levels over many years.
The enclosure is tuned to a low frequency by way of a long port with a large surface area. This allows the DBS 18-2 to obtain a wide passband and a considerable extension towards the bottom end of the frequency response. The DBS 18-2’s acoustic performance is the result of experience, in-depth analysis and careful design. The inner configuration improves the stiffness-to-weight ratio of the overall structure while the baffle orientation and the woofer placement are designed to minimise internal resonance, dampen box-vibration modes and eliminate completely the usual ‘port turbulence’ associated with this loading method. The name of this Outline design is ‘Decoupled Baffle Subwoofer’.
The DBS 18-2 is primarily intended for large-scale applications, although it is also ideally suited to projects that demand no-compromise audio quality. The DBS 18-2 addresses an increasing demand for accurate, high definition bass reproduction. This product is capable of outstanding electrical to acoustic power conversion but still within a compact package. The performance is very high thanks to the careful choice of the reflex alignment and the construction of the cabinet. The DBS 18-2 has a useable frequency range at -10 dB of from 28 Hz to 160 Hz, while the response is just +/-3 dB from 34 Hz to 107 Hz. The max sensitivity is 103 dB in half space and the maximum continuous AES power of 2400 W gives 137 dB SPL in half-space, while peak values can reach 147 dB SPL.
LAB 21 HS is a loudspeaker system suited to high-quality sound reinforcement of infra-low frequencies. It comprises a NdFeB 21” long-excursion woofer magnet (6.5″ voice coil). Loading is a hybrid waveguide indirect radiation system able to completely recover low frequency sound pressure emitted from the rear of its 21” woofer, which means an increase in sensitivity of 6 dB SPL.
In other words, with the same input voltage, this system gives an additional 6 dB over the entire low frequency band compared to the same speaker used in a closed cabinet and, on average, an additional 3 dB compared to what the same speaker would give at low frequencies if used with a horn-loaded, reflex or band-pass system. The fact that the sound is generated by two masses of air moved by a single diaphragm, greatly benefiting attack velocity in the transitory frequencies, results in deep, very clean low frequencies.
LAB 21 HS has a frequency range at -10 dB of 23 Hz to 165 Hz (maximum crossover frequency suggested: 100 Hz). Among the options available, a trolley ensures fast handling and efficient protection of the front of the enclosure against impacts. The black finish is in special high quality wear and weather-resistant paint. Sixteen strategically positioned integral handles facilitate handling.