EM Acoustics EMS-81X User Manual download pdf (Page 11)

EMS-81X User Manual

www.emacoustics.co.uk

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-81X: Low Frequency Drive Unit

1. Using a 3mm Allen key, undo the four M4 machine screws top & bottom of the enclosure (2 each end). Gently

remove the grille from the front of the enclosure.

2. Using a 4mm Allen key, remove the eight M5 socket-head bolts holding the drive unit in place, and keep them

safe – ensuring you have collected both the shake-proof and flat washers for each bolt. Gently lift the drive

unit out of its locating hole – please take care as it is heavy! Carefully disconnect the cables from the drive

unit.

3. To reinstate the driver, simply reverse the above procedure. Please observe the correct polarity – red cable to

positive terminal, black cable to negative.

4. Reinstate the grille by gently placing it in place over the front of the loudspeaker. Replace the four M4

machine screws to secure it in place.

EMS-81X: High Frequency Drive Unit

1. Follow the procedure above to remove the front grille.

2. Using a 4mm Allen key, remove the four M5 socket-head bolts holding the waveguide in place. Gently

disconnect the cables from the drive unit and remove the unit from the enclosure.

3. To reinstate the drive unit, gently reconnect the cables (white cable to positive terminal, yellow cable to

negative) and insert back into position. Note the waveguide orientation for correct dispersion. Replace the

four bolts and gently tighten.

4. Reinstate the grille by gently placing it in place over the front of the loudspeaker. Replace the four M4

machine screws to secure it in place.

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EM Acoustics EMS-81X User Manual Page 11