Introduction

The Tannoy Di8 DC is a surface mount weather resistant loudspeaker with a 200mm (8.00") Dual Concentric� drive unit for performance critical installs where high power output and wide frequency bandwidth are required. The premium audio quality of the Dual is ideal for high performance stereo or monaural background or foreground music systems in applications including theme parks, retail premises, restaurants and caf�s, corporate audio visual, residential developments and houses of worship.

Weather resistant, rated IP64 to EN60529 (IEC529); the textured black or white painted finish, with matching rubber trims, of the outstandingly durable and scuff resistant, high impact polystyrene (HIPS) enclosure is fully optimised for consistent performance in adverse conditions indoors or out.

Transformer version - the Di8 DCt
The Di8 DCt model option is equipped with an internally mounted 60W low insertion loss line transformer, with easily accessible rotary tapping switch, for 70V or 100V distributed sound applications.
70V systems: 60W / 30W / 15W / 7.5W / OFF & Low Impedance operation
100V systems: 60W / 30W / 15W / OFF & Low Impedance operation

Features

The Di8 DC speaker cabinet is available in either black or white with matching rubber trims. Further architectural modification is possible by factory fit application of alternative red or blue colour trims. Two standard colour trim options are available from stock; enabling black or white product to be supplied factory pre-fitted with either red or blue trims.

Other trim colours can also be created to suit specific requirements, but only as a special order customisation subject to minimum order quantities. Primarily this is aimed at corporate branding applications, where this aesthetic flexibility will enable colour coordination for larger installs.

Hardware options: A multi position yoke bracket is supplied with all models, passive and active, for easy and rapid installation.

Two optional mounting accessories are available: a pole mount adaptor kit and, specifically designed for the passive Di models, the unique, pre-wired and fully adjustable wall bracket, the K-Ball�.

A wiring loom through the arm of the K-Ball� bracket allows pre-wiring of the system to a Euroblock connector plug located in the bracket�s ball joint. With the assembly mounted to a standard conduit junction box (J-box) it is ready to receive the speaker during the install commissioning stage. Simply swivel the Di into the desired angle for optimum coverage before tightening the locking collar.

Drive Unit

The 200mm (8.00") Tannoy Dual Concentric� in the Di8 DC is a point source drive unit design comprising a resin treated multi fibre paper pulp mid bass cone and a 25mm (1.00") ferrofluid cooled, titanium dome HF unit with neodymium magnet system.

The mid-bass and tweeter sections of the Dual Concentric� constant directivity driver are coincidentally aligned to a true point source; ensuring a wide and controlled dispersion for optimum coverage; this while avoiding the massive loss of energy in the vertical plane, at the crossover frequency, inherent in two-way discrete designs. This high power and high sensitivity design, with extended frequency response and very low distortion, is equipped with dynamic high frequency protection.

The Dual Concentric� point source speaker technology delivers an acoustic performance of outstanding clarity, definition and detail with class leading vocal intelligibility with the added benefit that the speaker can be mounted in either vertical or horizontal orientations on walls or ceilings with no compromise to performance.

NWAA Labs

Tannoy has commissioned NWAA Labs, an independent laboratory providing uniform product testing of loudspeakers and materials to the audio and acoustics industry, to undertake an extensive specification verification programme for its loudspeaker products.

With eighty years experience in the manufacture of loudspeakers Tannoy is justifiably proud of the audio performance of their acoustic technologies, such as the point source, constant directivity Dual Concentric� driver.

As one of the worlds leading manufacturers of premium quality loudspeakers we are fully confident in our product performance and the veracity of our internally generated specifications and performance data. However, we are delighted now to have established an ongoing working relationship with NWAA Labs; one that enables us to present an independently verified folio of technical data for each product, eliminating the need for this to be repeatedly commissioned by consultants and specifiers across the world.

Unlike any other laboratory in the world, NWAA Labs has the ability to do MACH� Testing (Multi Angle Computerised High-speed Testing�) to meet ISO and ASTM standards. Based just north of Los Angeles, California, the laboratory facilities include an anechoic chamber and two reverberation chambers uniquely fitted with the MACH� Testing system.

Led by former NASA design engineer and scientist, Ron Sauro, the NWAA Labs team combines the talents of well-respected researchers, acousticians and consultants to provide unmatched state-of-the-art testing. Well known in the audio and acoustics industry as a consultant and a member of the EASE and EASERA computer software development team, Ron brings over 20 years of field experience to the company.

MACH� Testing and what it delivers:
Originally developed by NASA in 1968 for use in testing the Pioneer, Explorer and Voyager spacecrafts in addition to the manned Apollo lunar program, the MACH� Testing method has been reformulated into a revolutionary process for evaluating loudspeakers and materials. This cross-pollination of technology from the realm of space research to the world of sound and acoustics research has produced a high-speed testing system unlike any other.

The new MACH� testing method uses a proprietary array comprised of 19 matched microphones and a precision turntable capable of one tenth degree accuracy. It simultaneously samples impulse responses within an anechoic chamber and uses these to create loudspeaker radiation balloons in a fraction of the time used by other testing methods.

This data is gathered by a multi-channel version of EASERA, using appropriate stimuli, and then is converted to EASE V4, EASE V3, CLF 1 and 2 formats for distribution to consultants and specifiers.

All the EASE and CLF data, plus the certified specification files, can be accessed by going to the main site downloads section or clicking the download tab on this product page.