EM Acoustics MSE-159SP self-powered fullrange loudspeaker - Manual (Page 20)

Page 20 of 25
MSE-159SP User Manual
v1.0 May 2012
6.0 - Servicing Information
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.
MSE-159: Low Frequency Drive Unit
1. Using a 3mm Allen key, undo the six M4 machine screws top & bottom of the
enclosure (3 each end). Gently remove the grille from the front of the enclosure.
2. Using a 5mm Allen key, remove the two M6 socket-head bolts holding the central grille
brace in place.
3. Using a 5mm Allen key, remove the eight M6 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.
4. To reinstate the driver, simply reverse the above procedure. Please observe the
correct polarity – red cable to positive terminal, black cable to negative.
5. Reinstate the grille by gently placing it in place over the front of the loudspeaker.
Replace the six M4 machine screws to secure it in place.
MSE-159: High Frequency Drive Unit
1. Follow the procedure above to remove the front grille.
2. Using a 4mm Allen key, remove the eight M6 countersunk 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 six M4 machine screws to secure it in place.