DIAPHRAGM
Ø 18" CONE WITH 18 g MASS
multi-axial carbon fibre & polyethylene terephthalate composite
MAX LOAD
100 000 x
mass of part
MAGNETS
NEODYMIUM RARE EARTH MAGNETS
permanent magnets with high magnetic flux strength
10.89
Boron
B
5
55.85
Iron
Fe
26
144.24
Neodymium
Nd
60
COILS
2 x Ø 82mm COPPER COILS
8 Ω RESISTANCE
- capable of converting 500A / 1000W to kinetic energy
- can be wired in series or parallel
- reinforced by carbon fibre sleeve
PUSH / PULL DRIVE
coils above and below diaphragm prescribe position at all times and produce "lightning fast" response
CORE
>16kg precision machined component
FUNDAMENTAL COMPONENT IN TORUS DESIGN
THERMAL TRANSFER
acts as a heat sink to conduct heat away from the coil
STRUCTURE
conducts structural borne resonance directly to ground
MAGNETIC FLUX
combines magnetic flux to create push-pull drive
STRUCTURE
PRECISION LASER CUT BRACE
optimised to provide structure while maximising cabinet volume
PERFORMANCE
FREQUENCY RANGE: 10Hz - 150Hz
PEAK OUTPUT: -6dB at -18Hz
SENSITIVITY: 100dB at 1m
CABINET
PIANO BLACK GLOSS FINISH
minimalist cylindrical design
"Strokes of genius are rare in any field,
but I think Milnes’ Torus qualifies”
"Strokes of genius are rare in any field,
but I think Milnes’ Torus qualifies”
The Torus places an 18” light-weight, super-stiff, multi-axial Carbon Fibre cone at the end of a phenomenally powerful push-pull motor. Unlike a common subwoofer that relies upon a high hysteresis suspension to reset the cone to zero, the cone position in the Torus is dictated at all times by electromagnetism. The result is low frequency sound with absolute precision and integration across the frequency range.
At the heart of the Torus is the core, a formidable 16kg precision machined steel column, with the two large rare earth magnets of the push-pull motor either side. The core is the reference point for every other component in the design, acting both to focus structural borne resonance directly to earth with zero reference to the outer enclosure and also a high capacity heat sink.
In the Torus, where huge amounts of low frequency energy are generated, thermal efficiency is a critical concern. In addition to the steel core, Wilson Benesch developed a Boron Nitride coil in collaboration with Oxford University. Boron Nitride offers the high electrical conductivity required by any coil design, but its thermal conductivity supersedes that of copper by several orders of magnitude.
The elegant and minimal toroidal shape of the Torus is a testament to the use of purist geometry in every component. Whether it be often earth shattering low frequencies in a home cinema, or the attack and dynamics of a drum solo, the Torus never misses a beat or fails to deliver the physical impact that we know and love of low frequency sound.
The Torus places an 18” light-weight, super-stiff, multi-axial Carbon Fibre cone at the end of a phenomenally powerful push-pull motor. Unlike a common subwoofer that relies upon a high hysteresis suspension to reset the cone to zero, the cone position in the Torus is dictated at all times by electromagnetism. The result is low frequency sound with absolute precision and integration across the frequency range.
At the heart of the Torus is the core, a formidable 16kg precision machined steel column, with the two large rare earth magnets of the push-pull motor either side. The core is the reference point for every other component in the design, acting both to focus structural borne resonance directly to earth with zero reference to the outer enclosure and also a high capacity heat sink.
In the Torus, where huge amounts of low frequency energy are generated, thermal efficiency is a critical concern. In addition to the steel core, Wilson Benesch developed a Boron Nitride coil in collaboration with Oxford University. Boron Nitride offers the high electrical conductivity required by any coil design, but its thermal conductivity supersedes that of copper by several orders of magnitude.
The elegant and minimal toroidal shape of the Torus is a testament to the use of purist geometry in every component. Whether it be often earth shattering low frequencies in a home cinema, or the attack and dynamics of a drum solo, the Torus never misses a beat or fails to deliver the physical impact that we know and love of low frequency sound.
"Adding the Torus transforms the timing and integration of the instruments. The picked melody is more fluid, quicker and more sinuous, the snare more snappy and insistent, the space around the instruments much more apparent, with walls and a floor. Suddenly the music takes on a feeling of underlying urgency that dovetails perfectly with the lyrics”
FINISHES
DESIGN
DIMENSIONS
PERFORMANCE
Precision machined MDF cabinet with steel bracing
Sealed enclosure
Super low compliance suspension.
18" carbon fibre diaphragm
Diameter: 450mm ( 17.7")
Height: 330mm ( 12.9")
Weight per unit: 32kg ( 70.5lbs)
Internal volume: 24L
Impedance: 8Ω per coil (can be wired in series or parallel)
Frequency response: 10Hz - 150Hz
Peak: -6dB at 18Hz
Sensitivity: 100dB at 1 metre
Biwireable
1000W peak program
Black piano gloss cabinet
Black anodised linished terminal block
High gloss carbon fibre diaphragm
Polished chrome anodised exterior pole component
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Wilson Benesch Ltd | Falcon House | Limestone Cottage Lane | Sheffield | United Kingdom | T +44 (0)114 285 2656
Designed and Built by Wilson Benesch 2019 | All rights reserved
