EMS Series User Manual – v2.0 EMS-81/EMS-81i EMS-121/EMS-121w/EMS-121i/EMS-121h EMS-152/152w EMS-215/EMS-215i 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 _________________________________________________________________________________________ Copyright EM Acoustics 2006 1 EMS Series User Manual www.emacoustics.co.
CONTENTS Introduction Thank you ...……………………………………………………………………………………………………………………………. 3 Unpacking ……………………………………………………………………………………………………………………………….. 3 Declaration of Conformity …………………….…………………………………………………………………………………… 3 Product Range Overview EMS-81 passive two-way fullrange enclosure ……………………………………………………………………………… 4 EMS-121 passive two-way fullrange enclosure ……………………………………………………………………………. 5 EMS-152 passive two-way fullrange enclosure …………………………………………………………………………….
INTRODUCTION Thank you Thank you for purchasing a product from the acclaimed EMS Series from EM Acoustics. The EMS Series products have been carefully designed and rigorously tested to ensure years of flawless operation and unprecedented sonic quality. Flexibility is the key factor with EMS products, and consequently they are at home within a wide variety of applications from live and portable applications, through to cafes, bars, nightclubs, theatres and conference centres.
PRODUCT RANGE OVERVIEW EMS-81/EMS-81i Loudspeaker The EMS-81 is a versatile, full-range loudspeaker product designed for a wide variety of compact and discreet sound reinforcement applications. It features a high-power 8” (203mm) vented LF driver and a 1” (25mm) exit HF compression driver on a rotatable 90° x 60° waveguide. These components are matched by an internal UniPhase crossover network for unprecedented sonic quality from a completely passive enclosure.
EMS-121/EMS-121w/EMS-121h/EMS-121i Loudspeaker The EMS-121 is a versatile, full-range loudspeaker product designed for a wide variety of sound reinforcement applications, where higher SPL and lower frequency response restrict the use of the EMS-81. It features a highpower 12” (305mm) vented LF driver and a 1” (25mm) exit HF compression driver on either a 60°H x 40°V (EMS121) or 90°H x 40°V (EMS-121w) waveguide.
EMS-152/EMS-152w Loudspeaker DA-1 Ready The EMS-152 is a high power, medium-Q performance loudspeaker designed for a variety of applications within the live and installation audio markets, where sonic performance and dispersion accuracy are of paramount importance. The enclosure features a high-power 15” (381mm), 4” voice coil neodymium vented LF driver and a 4” aluminium diaphragm, 2” exit compression driver on either a 60°H x 40°V (EMS-152) or 90°H x 40°V (EMS152w) waveguide.
EMS-215/EMS-215i Subwoofer DA-1 Ready The EMS-215 is a compact, powerful subwoofer system designed to extend the low frequency performance of EMS-81 and EMS-121 based systems. Through the use of a quasi-bandpass design, the enclosure size is kept to a minimum to allow ease of use in installations where space is a premium. It features a pair of high power 15” (381mm) LF drive units, each in their own vented chamber. Both drive units then fire through a single exit, located behind the foam grille.
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.
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.
MOUNTING & RIGGING OPTIONS Rigging Hardware & Accessories The EMS-81 and EMS-121 loudspeakers have a range of integral rigging hardware and optional accessories to enable usage in a wide variety of ways. The EMS-81 contains ten M10 threaded fixing points around the enclosure, to enable suspension using forged shoulder eyebolts (minimum thread length 20mm) or the optional FC-81v vertical or FC-81h horizontal flying cradles.
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.
Attachment of the FC-81h or FC-121h Horizontal Flying Cradles The EMS-121 enclosure is shown in the drawing, however the technique is the same for both the EMS-81 and EMS121 enclosures. Remove the M10 countersunk bolts on the top & bottom of the enclosure (marked “A” in Fig 1), position the end sections of the flying cradle and reinstate the bolts. Bolt the chosen attachment method to the top of the cradle, and secure the enclosure onto the suspension point or bar.
Attachment of the DFB-81 or DFB-121 flying bar The EMS-121 enclosure is shown in the drawing, however the technique is the same for both the EMS-81 and EMS121 enclosures. Position the two enclosures upright on a stable surface. Remove the M10 countersunk screws on the top of the enclosure (marked “A” in Fig 1) on both enclosures.
EMS-152 Rigging Options There are several different options for suspending an EMS-152 enclosure, detailed below. Suspension using forged shoulder eyebolts The EMS-152 can be simply suspended for more permanent applications using a pair of M10 forged shoulder eyebolts with a 20mm thread length. Simply screw the eyebolts into the two M10 mounting points on the top (or bottom if flying upside down) of the enclosure. These can then be attached to steel cables or chains to suspend the enclosure.
Attachment of the DFB-152 flying bar The attachment method is the same as for the DFB-81 or 121 – the only difference being the attachment points are the exposed M10 threaded fixings front and back on the enclosure’s centreline. Attachment of the FC-152v flying cradle Follow the procedure outlined on Page 11 above, using M10 bolts into the exposed M10 flying points front and back on the enclosure’s centreline.
Installation of the DA-1 Power Amplifier Module The EMS-152 fullrange loudspeaker and EMS-215 subwoofer can accept the EM Acoustics DA-1 digital power amplifier module. One DA-1 is used to drive one loudspeaker, in the following configurations: EMS-152 – bridge-mono mode, with the two amplifier channels driving the internal passive circuitry. EMS-215 - two channel mode, with each drive unit driven by one channel. To install the DA-1, lie the enclosure on its front.
MAINTENANCE Your EM Acoustics loudspeakers have been rigorously tested before they leave our factory, to ensure that they give you a lifetime of flawless operation. Should any of your drive units fail and need replacing, please follow the guidelines below. EMS-81: Low Frequency Drive Unit 1. Carefully insert a flat bladed screwdriver between the grille and the top of the enclosure, and gently lever the grille upwards.
EMS-121: Low Frequency Drive Unit 1. Carefully insert a flat bladed screwdriver between the grille and the top of the enclosure, and gently lever the grille upwards. This will ease the grille out of its locating slots along the side of the enclosure, revealing the drive units. Ensure to approach the grille at the top of the enclosure as this will prevent the risk of the screwdriver damaging the LF drive unit. 2.
EMS-152: Low Frequency Drive Unit 1. Carefully lift back the foam on the top & bottom edges of the grille. Remove the five PoziDrive screws (3 top, 2 bottom using a PZ2 screwdriver) and insert a flat-blade screwdriver under the grille. This can then be used to ease the grille out of its locating slots. 2. Using a 5mm Allen Key, undo the six bolts securing the drive unit in place.
EMS-215: Low Frequency Drive Units NOTE: ONLY ATTEMPT TO REMOVE DRIVE UNITS WITH THE EMS-215 IN AN UPRIGHT POSITION! 1. Carefully lift the foam along the long edges of the grille to expose the three locating screws on each side. Using a No.2 Pozidrive screwdriver, undo these screws and keep them to one side. 2. Insert a flat bladed screwdriver between the enclosure and the long edge of the grille, and gently lever the grille upwards. This will ease it out of its locating slots down the shorter sides. 3.
WARRANTY Limited Warranty This EM Acoustics loudspeaker product is warranted to the original end-user purchaser and all subsequent owners for a period of three years from the original date of purchase. Warranty Coverage This warranty covers defects in materials and workmanship. It does not include: • Damage or failure caused by accident, misuse, neglect, abuse or modification by any person other than an authorised EM Acoustics representative.
APPENDIX A – TECHNICAL SPECIFICATIONS EM Acoustics operates a continuous process of research and development, and as such reserves the right to alter specifications without notice. EMS-81 Enclosure Type: 2-way, reflex loaded Dimensions (HxWxD, mm/ins): 461/18.1 x 308/12.1 x 268/10.
EMS-121 Enclosure Type: 2-way, reflex loaded Dimensions (HxWxD, mm/ins): 595/23.4 x 402/15.8 x 341/13.
EMS-152 Enclosure Type: 2-way, medium-Q reflex loaded Dimensions (HxWxD, mm/ins): 695/27.4 x 488/19.2 x 485/19.
EMS-215 Enclosure Type: Dual driver quasi-bandpass Dimensions (HxWxD, mm/ins): 823/32.4 x 516/20.3 x 700/27.6 (excl.
