EM Acoustics I-1 Bedienungsanleitung

i-Series User Manual

www.emacoustics.co.uk

i-Series

User Manual – v2.0

i-1

i-2

i-8

i-12

EM Acoustics Loudspeakers

Building 74, Dunsfold Park

Cranleigh, Surrey

GU6 8TB, UK

Phone +44 (0) 1483 266520

Fax +44 (0) 1483 275619

www.emacoustics.co.uk

_________________________________________________________________________________________

i-Series User Manual

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CONTENTS

Introduction

Thank you ...…………………………………………………………………………………………………………………… 3

Unpacking ………………………………………………………………………………………………………………………. 3

Declaration of Conformity ……………………………………………………………………………………………… 3

Product Range Overview

i-1 ultra-compact satellite enclosure …………….……………………………………………………………….4

i-2 ultra-compact fullrange enclosure …………………………………………………………………………….4

i-8 ultra-compact subwoofer enclosure ………………………………………………………………………….5

i-12 compact subwoofer enclosure …………………………………………………………………………….….5

System Set-up

Safety Considerations……………………………………………………………………………………………………….6

Cabling & Amplifier selection …………………………………………………………………………………………..7

Mounting & Rigging Options

Rigging Hardware & Accessories ……………………………………………………………………………………..8

Permanent Installations ……………………………………………………………………………………………………8

i-1 Rigging Accessories …………………………………………………………………………………………………….9

i-2 Rigging Accessories …………………………………………………………………………………………………….9

DA-1 Amplifier Installation

i-12 Subwoofer ………………………………………………………………………………………………………………..11

Maintenance

i-1 Drive Unit Service ………………………………………………………………………………………………………12

i-2 Drive Unit Service ………………………………………………………………………………………………………12

i-8 Drive Unit Service …………………………………………………………………………………………………..…13

i-12 Drive Unit Service ……………………………………………………………………………………………………14

Warranty ……………………………………………………………………………………………………………………………………..15

Appendix A – Technical Specifications ……………………………………………………………………………………….16

i-Series 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 [email protected].uk 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.

i-Series User Manual

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PRODUCT RANGE OVERVIEW

i-1 Ultra-Compact Satellite Loudspeaker

The i-1 is a compact, satellite mid/high loudspeaker, designed for a wide variety of discreet sound reinforcement

applications from museums and themed attractions through to infills in nightclubs and bars. It contains a single 4”

(102mm) titanium cone drive unit, with integral passive circuitry for unprecedented sonic performance from an

enclosure type where compromises are usually made. Small enough to be easily concealed, yet with enough SPL

output to be of use in low to medium SPL applications.

As with all EM Acoustics products, no external equalisation is required to make the i-1 perform as specified. A

high-pass filter set at 125Hz (24dB/Octave minimum) is recommended to prevent the drive unit from over-

excursion.

i-2 Ultra-Compact Fullrange Loudspeaker

The i-2 is an ultra-compact fullrange loudspeaker, designed specifically for applications where controlled, accurate

dispersion is required. The use of a 4” x 1” planar wave drive unit for HF allows the i-2 to produce a coverage

pattern of 90°x 20°, which can be rotated to allow use in any orientation. Innovative passive crossover technology

creates perfect time alignment between the three components, and avoids the interference lobing normally

encountered with such designs.

As with all EM Acoustics products, no external program or equalisation is required for the i-2 to function correctly.

However, for higher-SPL applications a high pass filter set above 50Hz is recommended.

i-Series User Manual

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i-8 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 enclosure 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.

i-12 compound isobaric subwoofer

DA-1 Ready

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 25Hz, with more SPL

available than the smaller i-8. The enclosure comes supplied with heavy-duty castors and steel bar handles as

standard, and as with other EM Acoustics products is fitted with Neutrik SpeakonTM connectors as standard. The i-

12 can also accept the DA-1 digital power amplifier module.

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.

i-Series User Manual

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SYSTEM SET-UP

Safety Considerations

Loudspeaker systems are potentially dangerous objects if used incorrectly. Please ensure that you read this

section fully, and contact EM Acoustics or your local dealer should you be in any doubt over correct operation

procedures.

Professional loudspeaker systems are capable of producing damage-inducing sound pressure levels, and hence

care should be taken when setting your system up, particularly when it comes to loudspeaker placement within a

venue. Damage to the ear can result from levels above 90dB under prolonged exposure.

Stand Mounting

The i-1 yoke has a hole for microphone stand mounting, and the i-2 has two 3/8” threaded fixings for microphone

stand mounting. When mounting in this way, please consider the following:

•Ensure your stand height is locked off and the tripod legs are positioned so as to be stable.

•Check the weight loading of your stands before attempting to mount the loudspeaker.

•Do not stack a second loudspeaker on top of the stand-mounted one.

•Ensure cables are run so as to leave enough slack to enable neat wiring, and thus reduce the risk of the

speaker being pulled over. Loose cables should be covered or taped down wherever possible to reduce trip

hazards.

•If stands are being used outdoors, it may be necessary to add ballast to the base of the stand to prevent it

toppling over.

Ground Stacking

•Ensure that the floor or stage surface can withstand the weight of the system.

•Wherever possible, avoid high stacks and use ratchet straps to secure loudspeakers together. Please also

remember that vibrations from subwoofer systems can shake other loudspeakers out of place, which may

present a toppling hazard. The use of ratchet straps and non-slip material is recommended to prevent this.

Rigging and Suspension

There are a variety of different methods for suspending your i-Series enclosures – please see the detailed section

on Page 8 for further information.

WARNING: The overhead suspension of loudspeakers is a very serious issue with potentially lethal

consequences should anything go wrong. Rigging should only be carried out by experienced

i-Series User Manual

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personnel following safe working practice. Should you be in any doubt whatsoever, please contact

your local dealer who will be able to refer you to a suitable rigging company.

Cabling and Amplifier Selection

The i-Series products are designed to be used with professional power amplifiers providing the following power

outputs:

i-1 80W/channel into eight ohms

i-8 1000W/channel into four ohms

It is good practice to use an amplifier equal to the program power rating of the loudspeaker – so as to retain

sufficient headroom and good dynamic range. Care should be taken during operation to avoid amplifier clipping –

as this can cause serious damage to your loudspeakers. If in doubt, please contact your dealer who will be happy

to assist you in correct amplifier choice and setup.

Cabling

i-2 loudspeakers and i-8/i-12 subwoofers are supplied with Neutrik SpeakonTM NL4 connectors, wired pin 1+/1-. i-

1 satellite enclosures are supplied with 4mm binding posts (red positive, black negative). It is recommended that

the resistance of your cable is less than one tenth of the nominal system impedance. Given below are the

recommended maximum cable lengths for different cross-sections and impedances.

Conductor Cross Sectional Area Maximum Recommended Cable Length

4 ohms 8 ohms 16 ohms

1.0mm211m 22m 44m

1.5mm2 17m 34m 68m

2.0mm222m 44m 88m

2.5mm229m 58m 116m

4.0mm244m 88m 176m

6.0mm266m 132m 264m

A small power amplifier working too hard is more likely to damage a loudspeaker than a large power amplifier

working within its operating range!

i-Series User Manual

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MOUNTING & RIGGING OPTIONS

Rigging Hardware & Accessories

The i-Series loudspeakers have a range of integral rigging hardware to enable usage in a wide variety of ways.

The i-1 is supplied with four M5 fixings (one on each side of the enclosure) and a steel yoke. This steel yoke

attaches to either pair of fixings to provide pan & tilt options. The yoke has five mounting holes – four M5 holes

are supplied for permanent installations (for affixing permanently using wall anchor bolts) and one central larger

hole for either M12 bolts (hook clamps) or affixing to a 3/8” microphone stand thread.

The i-2 has three four different mounting methods available. A microphone stand can be used to mount the

enclosure in either vertical or horizontal formats, whilst the four M6 points on the rear allow permanent installation

with OmnimountTM or PowerDriveTM mounting hardware. Two rigging accessories are also available for the i-2 –

the YK-i2 vertical hanging yoke, and the YK-i2h horizontal hanging bracket.

The i-8 contains sixteen M10 threaded fixings around the enclosure, to enable suspension using forged shoulder

eyebolts with a minimum thread length of 20mm. With any suspension method, a second anchor point should be

used as a safety.

The i-12 has no dedicated rigging options, as it is designed to be ground stacked only. If you have any special

requirements, please contact your local EM Acoustics representative or else email info@emacoustics.co.uk with

your enquiry.

Under no circumstances should the mounting points of one enclosure be used to suspend another

enclosure below it. EM Acoustics are in no way responsible for the failure of incorrectly rigged

systems. This information relates specifically to the rigging techniques for the i-Series enclosures

only. If you are in any doubt about safe practices for rigging loudspeakers, please contact your local

EM Acoustics dealer who will be able to advise you.

Permanent Installations

Any installation (permanent or temporary) must be securely attached to the structure of the building using chain,

steel wire or web straps that are certified and load rated for the loudspeaker system. Consideration must be taken

when determining the loading on the structure to include loudspeakers and rigging hardware, and the appropriate

safety factor can then be decided upon. If you are in any doubt whatsoever, please contact your EM

Acoustics dealer who will be able to refer you to an experienced rigging company. A reputable rigging organisation

should also be able to advise on legislation regarding safety factors for suspended systems of this type.

i-Series User Manual

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Attachment and Adjustment of the YK-i1 yoke

The i-1 ships with the YK-i1 yoke attached in the normal operating plane. Should you wish to rotate the yoke (for

example to utilise the trapezoidal enclosure shape to fit the i-1 closer into a corner), remove the two countersunk

M5 machine screws in the enclosure, and remove the M5 socket-head bolts holding the yoke in place. The yoke

can then be rotated and the bolts reinstated in the alternative points. Ensure to reinstate the countersunk bolts

into the unused holes, otherwise the enclosure will leak.

Attachment of the YK-i2 vertical hanging yoke

Using a flat-blade screwdriver, remove the two M8 countersunk bolts on the flat side of the enclosure (marked “A”

in Fig 1). Position the YK-i2 mounting plate over the two holes, reinstate the bolts and tighten securely. There are

three hole positions for an attachment device in the top of the yoke (marked “B” in Fig 2). For permanent

installation, these can be used to fix the YK-i2 directly to a surface. For temporary installation, a standard hook

clamp is recommended. Attach this clamp or other suitable device using an M10 bolt, nut and washer set. The i-2

can now be securely suspended and oriented as required. By rotating the YK-i2 through 180 degrees, it can be

used to allow down-tilt or up-tilt when using a microphone stand (Fig 3).

i-Series User Manual

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Attachment of the YK-i2h horizontal hanging yoke

With the i-2 lying on its side, remove the two countersunk M10 fixings in the ends of the enclosure (marked “A” in

Fig 1) and put them in a safe place. Position the YK-i2h over the enclosure, insert the knurled plastic knobs into

the holes and tighten securely. There are three possible positions for an attachment device – only the central

point (marked “B”) should ever be used by itself. If using the end points (marked “C”), both should be used to

avoid unnecessary strain on the yoke.

Attachment of OmnimountTM or PowerdriveTM Installation Brackets

It is strongly suggested that you position your loudspeakers, then mark & drill the holes in the mounting walls

before you attach the bracket to the loudspeaker, as it is much easier to check positioning and fit of the holes

without the weight of the loudspeaker.

The i-2 is designed to work with OmniMountTM Series 30 or PowerDriveTM Series 75 products.

Lie the enclosure on its front and remove the four M6 countersunk points on the rear of the enclosure. Position

the loudspeaker-side of the bracket as required, reinstate the bolts and retighten. The bracket and i-2 can now be

mounted using the holes you have pre-drilled.

Safety Considerations

When utilising any suspension method, a secondary safety must be used. For the i-1, wrap a safety steel cable

around the yoke and then affix securely to your safety point. For the i-2, when using installation brackets or the

YK-i2, a forged shoulder M10 eyebolt can be fitted into one of the points on the end of the enclosure, and this can

be used to attach a safety. For use with the YK-i2h, use an M8 forged shoulder eyebolt in one of the M8 points on

the sides.

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