EM Acoustics X3-DFSP self-powered downfill element - Manual (Page 26)

Page 26 of 36
X3-SP User Manual
v1.0 May 2012
phase plug protrudes towards the cone and sideways motion could damage the
cone surface. To re-install the drive unit, position the drive unit in place on the
moulding and carefully insert the eight M6 socket head machine screws. It is best
to start these bolts into their threads by hand, to avoid cross-threading. Once
these are tight, re-connect the cables via the spade terminals observing the correct
polarity (brown positive and blue negative) and then replace the midrange bowl.
Re-instate the M8 hex-head bolts and re-tighten – being careful not to overtighten.
IMPORTANT NOTE: Do not attempt to remove the midrange moulding from the
front of the X3 enclosure. The moulding is sealed in place and removing it will
break the seals.
X3/X3-SP enclosure - Removing the HF Array
1. Lie the enclosure on its back. Remove the M4 socket head machine screws (3 top,
2 bottom) and the eight Pozidrive screws (4 each side) that secure the grille, and
carefully remove the grille.
2. Remove the eight M6 countersunk machine screws securing the HF array
waveguide. Note that the four outer bolts are shorter than the four inner bolts.
Once the bolts are removed, gently lift the X3 waveguide moulding out of its
location.
3. Once the waveguide is removed, disconnect the cable assembly.
4. To reconnect the cables, note that the wiring orientation is critical. The X3 Array
label should point upwards when the box is upright, and the cables have the
correct length for each drive unit. Ensure polarity is also correct (white positive,
yellow negative).
5. To re-instate the HF array, position in place and gently press the moulding down
until it rests on its mounting flange. Ensure the cables are not caught up when
you reinstall. Replace the eight M6 bolts and retighten.
X3-DF/X3-DFSP enclosure - Removing the MF Drive Unit
1. Lie the X3 enclosure on its bottom so that the top access panel is easily accessible.
2. Remove the eight socket-head machine screws around the outside of the access
door, and then remove the door. Disconnect the cables from the drive unit
observing correct polarity.
3. Remove the eight M6 socket head bolts securing the 8” drive unit in place. The
drive unit can then be removed. Ensure you lift the drive unit away along the axis
of the waveguide, as the phase plug protrudes towards the cone and sideways
motion could damage the cone surface. To re-install the drive unit, position the