EM Acoustics i-12 User Manual

i-Series Subwoofers

User Manual – v3.0

i-8 compact compound isobaric subwoofer

i-12 compound isobaric ULF subwoofer

EM Acoustics Loudspeakers

Building 74, Dunsfold Park

Cranleigh, Surrey

GU6 8TB, UK

Phone [phone]

Fax [phone]

www.emacoustics.co.uk

_________________________________________________________________________________________

Copyright EM Acoustics 2010

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i-Series Subwoofers User Manual

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CONTENTS

Introduction

Thank you Page 3

Unpacking Page 3

Declaration of Conformity Page 3

Product Overview Page 4

System Set-up

Safety Considerations Page 6

Cabling & Amplifier selection Page 6

i-12 impedance selection Page 7

Processing Page 8

Mounting & Rigging Options

Ground Stacking Page 9

Rigging Hardware & Accessories Page 9

Permanent Installations Page 9

Maintenance Page 10

Warranty Page 12

Appendix A – Technical Specifications Page 13

THIS MANUAL HAS BEEN UPDATED TO APPLY TO ALL i-12 SUBWOOFERS, and i-8

SUBWOOFERS FROM SERIAL NUMBER i8071112/001 ONWARDS.

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i-Series Subwoofers User Manual

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INTRODUCTION

Thank you

Thank you for purchasing a product from the i-Series from EM Acoustics. The i-Series products have been

carefully designed and rigorously tested to ensure years of flawless operation and unprecedented sonic quality.

Designed primarily for discreet installation use, the i-Series products find applications from cafes and bars through

to museums, nightclub infills and themed attractions.

Please ensure that you read this manual carefully before use, and that you keep it to hand should you need it for

further reference. Furthermore, should you have any difficulties please do not hesitate in contacting your EM

Acoustics dealer, or email [e-mail] for further assistance.

Unpacking

Every EM Acoustics product is built to the highest standard and thoroughly tested before it leaves our factory.

After unpacking your loudspeaker, please inspect it carefully for any signs of transit damage. If such damage is

found, please notify the carrier at once to instigate a claim. It is suggested that you retain all packaging for future

re-shipment.

DECLARATION OF CONFORMITY

The products contained within this manual conform to the requirements of the EMC

Directive 89/336/EEC, amended by 92/31/EEC and to the requirements of the Low

Voltage Directive 73/23/EEC amended by 93/68/EEC.

Standards Applied: EMC Emission EN55103-1:1996

Immunity EN55103-2:1996

Electrical Safety EN60065:1993

RECYCLING

This product and its packaging constitute the applicable product according to the WEEE directive.

Please ensure that at the end of the working life of this product, it is disposed of sensibly in

accordance with local and national recycling regulations. The packaging supplied with this product

is recyclable. Please retain all packaging, however if disposing of this packaging please ensure

that you comply with local recycling regulations. These products also all comply to the RoHS

Directive 2002/95/EC.

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i-Series Subwoofers User Manual

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PRODUCT OVERVIEW

i-8 compact compound isobaric subwoofer

The i-8 is a subwoofer designed to create the depth and authority in low frequencies that is normally associated

with large systems, but in a compact package for ease of installation. Consequently, the i-8 has a frequency

response down to 35Hz yet is small enough to be concealed underneath sofas or in small wall cavities. The i-8 -

although small in size – has enough SPL output to be of use for nightclub or corporate applications, and even for

small FOH systems underneath EMS-81 enclosures. The i-8 subwoofer houses four 8” (203mm) long excursion low

frequency drive units, arranged as two isobaric pairs. This loading allows the e nclosure to reproduce frequencies

not normally achieved from an enclosure of this size.

The enclosure is fitted with sixteen M10 threaded fixings, to allow overhead suspension in applications where floor

space is not available. Standard connectors for the i-8 are Neutrik SpeakonTM NL4MP, although alternatives can be

supplied on request.

As with all EM Acoustics products, no external equalisation is necessary to get the enclosure to perform as

specified. An active low pass filter is however required below 150Hz for correct operation, and for drive unit

protection a high pass filter is recommended – please see the processing section of this manual for more

information.

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i-12 compound isobaric ULF subwoofer

The i-12 is the bigger brother of the i-8, and utilises the same enclosure technology. Four high power, long

excursion 12” (305mm) drive units are contained within the compact enclosure, again arranged in a compound

isobaric format. This loading allows the i-12 to effortlessly reproduce frequencies as low as 27Hz, with more SPL

available than the smaller i-8. This makes the i-12 the ideal theatrical effects subwoofer system, or an ideal

companion to the EMS-215 dual 15” subwoofer system where extra depth of response is required.

The enclosure comes supplied with steel bar handles as standard and there is an optional transit wheelboard and

protective cover. The i-12 is fitted with Neutrik SpeakonTM connectors as standard.

As with all EM Acoustics products, no external equalisation is necessary to get the enclosure to perform as

specified. An active low pass filter is however required below 100Hz for correct operation, and for drive unit

protection a high pass filter is recommended – please see the processing section of this manual for more

information.

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i-Series Subwoofers User Manual

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