Tannoy I9 user manual Introduction, Unpacking

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 (8Ω) 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 8Ω 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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