The Westminster Royal SE, the crowning achievement of the Prestige range, combines hand built traditional compound horn loaded enclosure with the latest technological innovation in acoustical engineering.

The 15” Dual Concentric™ drive unit incorporates an Alnico magnet system with an integral computer designed and manufactured reverse throat high frequency PepperPot
WaveGuide™ for exceptional transient response and increased sensitivity. A hard edge’ cone surround and unique chassis earthing system deliver tight, fast and controlled bass with fluid and transparent midrange and high frequency performance of great purity.

The magnificent 530 litre cabinet with its complex horn loading system delivers greatly increased efficiency with a wave front area approaching that from real instruments. Effortlessly capable of resolving truly low frequencies and the reproduction of the dramatic dynamic range of musical instruments with stunning realism, this is a true Tannoy classic.

Having re-evaluated the performance of models throughout the Prestige range, Tannoy engineers selected the latest cutting edge components and materials at their disposal to introduce several performance enhancing amendments to the crossover topologies within the 'SE' models. To optimise acoustic performance only components of the highest possible standard have been used.

Westminster Royal SE benefits from Acrolink® cable right through from terminal panel to crossover, crossover to drivers and the LF board wiring itself; not forgetting the bi-wire links. Cables produced by Acrolink® use self-stipulated 6N copper, constructed using the same process as is used with wires for semiconductor devices, which require a guarantee of high quality. More precisely, the purity of the copper needs to be over 99.9999% and the total of any impurity metals must be less than 1 part per million. The quality of this cable ensures that a powerful yet delicate and natural, fast response is accomplished throughout the signal path.

Very low loss laminated iron core inductors on the LF ensure that there is less resistance between the amplifier and driver, resulting in superior bass control. High purity silver (99.99%) link wires maintain signal path integrity on the separate HF crossover board and for the HF feed capacitor Hovland Musicaps® are used with a special Tannoy DMT™ (Differential Material Technology) isolation sleeve. Hovland Musicaps® are renowned for their exceptional dynamics, speed, focus, correct timbre and depth of field, and true inter-transient silence. Separate layers of polypropylene film and conductive foil deliver superior clarity of reproduction that metalised capacitors cannot match.

High quality ICW Musicaps are used in other areas. Vishay thick film non-inductive resistors are used in critical areas, with extensive heat sinking where necessary. The stable component temperature provided by the heat-sinking feature ensures maximum reliability and an even and consistent sound quality.

The 5-point (bi-wire and ground point) terminal panel uses gold plated terminals, with the driver chassis grounded via the 5th terminal. By using appropriate speaker cable, this proven technology, developed on earlier Prestige models, minimises the effects of RF interference resulting in a more transparent midrange. Additionally the Westminster Royal SE uses high quality WBT™ connectors to ensure easier connection of substantial loudspeaker cable whilst maintaining complete signal path integrity.

The unique advantage of the Tannoy Dual Concentric™ principle is that the low and high frequency sound radiation is generated on the same axis. In effect, the Dual is a single chassis comprising two separate drive units properly merged into one, with the high frequency unit mounted in the centre of the pole piece of the low frequency unit. High frequency sound radiates from the centre of the low frequency unit through a carefully designed high frequency exponential horn, either the PepperPot WaveGuide™ or the Tulip WaveGuide™ dependant on the model. It is the fact that the low and high frequencies are therefore fully integrated at source that gives the Tannoy Dual Concentric™ driver such unique sound reproduction qualities.

The location of the high frequency unit does not physically obstruct the low frequency unit in any way; a unique feature when compared with industry standard coaxial systems. Polar dispersion of sound is symmetrical in both the horizontal and vertical planes. By careful crossover network design the virtual acoustic sources of the high and low frequency units can be made to occupy the same point on the axis. Therefore the whole sound appears to emanate from a single point source located slightly behind the drive unit. This means that the loudspeakers, when fed from a high quality stereo source, can recreate a full and accurate stereo image.

The low frequency section of the Dual Concentric™ drive units has exceptional power handling and dynamic range. The low frequency cone piston is produced from selected multi-fibre paper pulp. This is specially treated to absorb internal resonance modes. A treated fabric surround, or rubber surround in the case of Autograph Mini, is designed to correctly terminate the moving cone and provide optimum compliance and linearity at large excursions. The cone piston is driven by a high power motor system, which in selected models uses an Alnico magnet. Alnico is an unusual iron/nickel alloy doped during the melt process with cobalt and aluminium to produce a magnetic material with very special properties. Having a high remanant magnetism and energy product, Alnico magnetises to a high level and retains an unusual degree of magnetisation. Alnico is also an electrical conductor. These properties give the Alnico magnet equipped Dual Concentric™ drivers an exceptionally clean transient response and increased sensitivity. The coil is wound with a special high temperature adhesive system and individually cured to ensure reliable operation at high peak power inputs. The shape of the low frequency cone is arranged to provide optimum dispersion of audio frequencies at both the high and low ends of the spectrum. The cone flare continues the high frequency horn profile to ensure a smooth transition at the crossover point.

The high frequency driver consists of a wide dynamic range compression unit giving superb transient performance with a smooth uncoloured response. The compression unit feeds acoustic power through a low compression phase compensating device, either the Tannoy Tulip Waveguide™ or the PepperPot WaveGuide™, to the throat of the acoustic horn formed by the low frequency cone. The low frequency cone profile provides a second waveguide with acoustic impedance transformation to match the high frequency radiation into the listening environment.

Either a titanium or aluminium alloy diaphragm, formed by a specially developed process, produces a piston with a very high stiffness to mass ratio. Optimum molecular grain structure gives long-term durability. A low mass precision coil provides the driving force for the diaphragm, energized by a powerful magnet system. A damped acoustic cavity to one side of the diaphragm controls the compression driver response and ensures perfect integration at the crossover point.