 Speakers |
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Precision Devices Case Study – EM Acoustics’ quake subwoofer
Precision Devices’ commitment to the utmost in drive unit technology is ideally demonstrated by the EM Acoustics Quake subwoofer – one of the most powerful single-driver subwoofers available today.
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Precision Devices Transducers |
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| What makes a Precision Devices transducer special? |
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THE PRODUCTS
All our loudspeakers and compression drivers are designed using the finest materials without compromise to cost. They are all made in our factory in the South West of England by craftsmen who take the utmost pride to produce the perfect product.
CHASSIS
Our unique twelve sided chassis are manufactured using die cast aluminium alloy with added sectional strength, often twice as thick as most manufacturers. The result is a range of drive units that won’t fail even under massive physical shock. The unique design, ensures that the fixing holes used to house the speaker into the cabinet are a good distance from the baffle hole in the cabinet. This ensures that should the cabinet be dropped there would be no splitting between the holes and the baffle.
Thick section chassis to ensure maximum heat transfer away from critical areas
Many chassis feature additional “hidden” mounting holes to allow maximum flexibility of installation
Extra wide flange prevents unwanted pressure from out of position fixing from distorting the chassis
CONES
The cones also made in England are carefully inspected prior to use to ensure they are within fine set tolerances.This ensures the exact sound quality will be found throughout the series.
Long fibre designs for improved internal damping and extra tear resistance
Air dried for optimum tonal qualities
MAGNET ASSEMBLY
The magnet assembly is the engine of the speaker and only the finest materials are used. The plate sets are precision machined in Sheffield, England using top quality low carbon steel selected for its magnetic properties.
The anisotropic ceramic magnets are tested to exacting tolerances to ensure the highest BL factors. All magnets are tested to withstand the extremes of working temperatures without loss of flux. This is very important where speakers can be used in freezing temperatures and also be driven to extremely high temperatures.
The fine machining tolerances of the plate sets ensures the strongest possible bond between magnet and plate set further increasing the magnetic strength. The tight tolerances used in the magnetic gap also increase the cooling for the voice coil.
Precision CNC machined for closest possible tolerances which minimizes variation
Strongest adhesives available are utilised for maximum shear strength, selected for their bond properties and never for speed of cure
Magnetized using our 100K Joule magnetizer to ensure total magnetization
VOICE COILS
The voice coil is the heart of the speaker.We are producing a range of voice coils from 38.1mm (1.5") to 152.4mm (6") using both copper and aluminium wire. The wire is coated with high temperature enamel, and precision wound onto an epoxy resin-impregnated woven fibreglass former. This is then cured in a precise temperature controlled oven to ensure a rigid assembly that is essential for greater strength and to maximise its energy transmission abilities.
Laminated construction for maximum strength
Wet wind process used on all our coils, a key process in which we have chosen component integrity over production speed
Our proprietary coil design/process, which we have developed in-house, is carefully optimised to give maximum strength and longevity. No compromise has ever been considered just to deliver short-term gain
Close tolerance wires are sourced for minimum unit to unit variation
SUSPENSIONS
Poly cotton material for maximum strength and longevity
Material properties selected for optimum strength, adhesion and longevity
TERMINALS
All models use metal push terminals as standard to ensure a perfect termination without the requirement of soldering.
DUST CAPS
All models use a solid composition centre dome and work as an extension of the cone, giving a greater cone area.
Made from long fibre pulp and on processes optimised for sound quality and never for speed of production
ASSEMBLY
At the end of this chain is the vital step which guarantees that all the effort we’ve put into the design is reflected in the manufacturing quality.
All components are assembled by a modular process, and each module is then individually tested before being assembled into a complete unit.
The result is a more accurate natural sound and improved reliability, through precisely-designed and manufactured components.
All processes and adhesives are chosen for their thermal and mechanical properties and never for speed of cure
Built using a carefully controlled blend of operator controlled and automated processes with in-built operator inspection at each key stage
All units are produced in our custom built facility which was designed by our team from a blank canvas to optimise all aspects of production |
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