Tannoy I9 - Manual (Page 3)

1. Introduction
The Tannoy i9 installation loudspeaker is designed for use in applications requiring high
quality music and speech, where wide and controlled coverage is required.
The i9 comprises four 130 mm (5”) low frequency drivers and three 25mm (1”) high
frequency drivers. The LF and HF sources are positioned as line source. The coupling
effects in the vertical plane result in a narrow and controlled vertical coverage pattern to
below 500Hz. The direct radiating drivers provide extremely wide horizontal coverage.
The complex frequency shading and integration techniques employed in the internal
passive crossover network result in a smooth and uniform frequency response.
The shallow cabinet profile of the i9 loudspeaker allows flexible and discreet installation
close to a wall or ceiling. Installation is made simple with a range of flexible mounting
and flying hardware.
The controlled dispersion characteristics of the loudspeaker (120 °×60°) allows the i9 to
be used in highly reverberant environments, by directing the sound into the desired
space, whilst minimising reflections from adjacent walls or ceilings. A 5
° downward tilt
angle on the front baffle allows the i9 to be used close to ceilings without sacrificing
vertical coverage
Located in the enclosure is a Tannoy THP60 multi-tap transformer for distributed-line
operation. The transformer provides high system sensitivity, a wide bandwidth and
dynamic range, with very low insertion loss.
The i9 can easily be switched from operating either as a low impedance (8 Ω) or
100V/70.7V distributed-line system, this selection being made (along with the
transformer tapping options) via a single rotary switch located on the rear termination
panel for quick and simple commissioning.
For applications requiring extended low frequency enhancement, a range of Tannoy
sub-bass systems are available and can be used in conjunction with the i9.
2. Unpacking
Every Tannoy i9 product is carefully tested and inspected before being packaged and
leaving the factory. After unpacking your loudspeaker, please inspect for any exterior
physical damage, and save the carton and any relevant packaging materials in case the
loudspeaker again requires packing and shipping. In the event that damage has been
sustained in transit, notify your dealer immediately
3. Low Impedance or 70.7/100V distributed line operation?
The i9 can be used as either an 8 Ω low impedance or 70.7/100V distributed-line
system. The operation mode is selectable via a single switch located on the rear of the
cabinet.
Low impedance mode is recommended if the cable runs are relatively short and the
number of speakers is small. If, on the other hand, the cable runs are long and the
number of speakers large, then a distributed line system is ideal.
The main advantage when operating in low-impedance mode, is the wider frequency
and dynamic range the speaker is able to deliver. If, however, the cable runs are long
then the sound quality may be compromised due to the increase in cable resistance and
the resulting power losses. To keep the load to the amplifier manageable, it is also
recommended that a small number of speakers be used, thus avoiding complex
series/parallel combinations.
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