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Ovator S-800 Loudspeaker

Ovator S-800
  • Ovator S-800
  • Ovator S-800
  • Ovator S-800
  • Ovator S-800
  • Ovator S-800

The Ovator S-800 is a true giant among loudspeakers. Not just in size and stature but in the innovative technology it uses and the musical performance that it achieves. With two new specially developed large 280mm flat-panel bass drive units and an 82mm flat-panel Balance Mode Radiator (BMR) in a 40 Litre enclosure, the Ovator S-800 is an imposing loudspeaker designed for larger than average listening rooms and for use with upper echelon Naim amplification. With bass extension down to 20Hz and maximum levels that can do full justice to the dynamic range of live music up close, the Ovator S-800 offers the ultimate in wide bandwidth and musical performance that cuts deep to the artistry and emotion of the performers.

For more technical detail please read the white papers available for the Ovator S-800.

Hardened floor spikes

Surgical grade, anti-magnetic, stainless steel M8 floor spikes define the vital mechanical connection between the speaker and the floor of the listening environment.

FEA modelled driver chassis

The Ovator bass drivers feature rigid paper cones, natural rubber surrounds and aluminium demodulations rings within their neodymium magnet systems.

The S-800 bass drivers additionally incorporate generous pole-piece ventilation. The linearity and resistance to compression of all Ovator models' bass drivers is outstanding.

Computer-modelled crossover

The crossover incorporates state of the art components including laminated and air-cored inductors, and metallised polypropylene capacitors.

Decoupling leaf spring

A steel leaf-spring provides the connection between the enclosure and plinth and decouples above 12Hz.

Die-cast plinth

The pressure die-cast plinth incorporates enclosure locations, housing for the crossover, and floor spike fittings with top-access adjustment.

Rigid multi-composite enclosure

The enclosure is constructed from a combination of 25mm and 50mm panels comprehensively braced to provide a rigid, non-resonant and low diffraction reference plane for the drivers. Selected panels also benefit from strategic mass-damping, and the internal bracing includes a division that creates separate loading volumes for each bass driver.

Computer-optimised bass driver

The Ovator S-800 features a new specially developed flat-panel bass driver that comprises a rigid paper cone and natural rubber surround together with aluminium demodulation rings within the magnet system and generous pole-piece ventilation. Its linearity and resistance to compression is outstanding.

BMR Isolating Enclosure

The BMR is mounted in a 12.7mm wall thickness extruded aluminium cylinder nested within the main enclosure. The cylinder, extending the full depth of the enclosure, is gradient-filled with damping materials selected through technical analysis and critical listening.

BMR driver

The new refined flat-panel BMR driver comprises a honeycomb diaphragm driven by a voice-coil immersed in a twin-neodymium magnet system optimised for linearity through finite-element analysis. The pressure die-cast chassis provides the rigidity necessary to ensure that every last note of musical detail is accurately reproduced.

BMR Suspension

The module comprising the BMR and its enclosure is suspended within the main enclosure by twin circular duralumin plate leaf-springs - one at the front of the enclosure and one at the rear. The resulting suspension system decouples above 4Hz - more than six octaves below the BMR pass-band.


Standing on the shoulders of giants

Drawing on over five years of research, the Ovator S-800 represents a significant step forward in Naim’s balanced mode radiator (BMR) design pioneered by the S-400 and S-600. The Ovator S-800's refined BMR constitutes its most visible technological advance, yet the performance of this loudspeaker is equally the result of painstaking refinement in numerous elements of design, construction, and material selection.

The loudspeaker uses two new finely tuned, custom-designed flat-panel bass drivers to handle the lowest frequencies. These are accompanied by the purpose-engineered and painstakingly refined BMR unit. This unit’s unique dispersion characteristics and freedom from crossover discontinuities, along with its vastly wide bandwidth, allow the S-800 to deliver a performance never before realised with traditional technology. The freedom from distortion and coloration achieved is truly ground-breaking and revelatory to experience.

One vital element in the design of a high performance bass driver is its chassis. Great rigidity and an open structure are vital but potentially conflicting requirements, so the pressure die-cast bass driver chassis of the Ovator S-800 incorporates a triangulated framework, borne of finite-element analysis, that ensures both rigidity and unimpeded air passage.

The Ovator S-800 crossover network is housed within the plinth and divides the audio signal between bass drivers and BMR with fourth order acoustic slopes at 380Hz. Each component selection is the result of intense technical analysis and listening, and the component arrangement is fundamentally informed by the layout and earthing techniques developed for Naim power amplifiers. A crossover module suspension system and individual component decoupling ensures any chance of microphony is minimised. Conversion to either bi-amp or tri-amp active drive is easily achieved through removal of the crossover module.

Just as much as it is BMR technology, it is the fine detail and the sum of the parts - the result of decades of speaker experience and development - that makes the Ovator S-800 so remarkable.

Balanced Mode Radiator Explained 

The Ovator S-800 Balanced Mode Radiator (BMR) is the result of intense effort in both development and manufacture. Not only does the design of such a driver demand great intellectual understanding, but consistent manufacture requires extraordinarily fine specification and control of the physical characteristics of its components.

The underlying concept of the BMR is to engineer a practical implementation of the theoretically wide bandwidth and linear acoustic output of an unconstrained vibrating diaphragm. In practice, this is achieved by attaching balancing masses to a constrained diaphragm in carefully calculated locations.

Such 'mode balancing' modifies the diaphragm's vibrational behaviour so that it simultaneously operates in pistonic and vibrational modes to generate wide-bandwidth acoustic output with a flat frequency response, consistent dispersion and low distortion. Thanks both to the BMR's exceptional inherent performance and to the absence of any mid/high frequency crossover discontinuity, it takes just a moment's listening to appreciate the Ovator S-800's breakthrough levels of musical coherence, timing and clarity.

Frequency Response 20Hz to 35kHz
Sensitivity 89dB for 2.83Vrms
Nominal Impedance 4Ω (Minimum Impedance 3.9Ω)
Suggested Power Amplifier Rating 25 - 250W (8Ω rating)
Weight 93.5kg
Dimensions 1393 x 520 x 542mm (H x W x D)
Standard Gloss Rosewood


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