In-wall Speaker Installation
To install a Studio Series in-wall speaker, proceed as described in the following paragraphs and accompanying diagrams:
Having selected the installation position and checked for the presence of studs (joists), pipe work, ducts or cables, mark a portrait orientation cut-line on the wall using the supplied template. Check that the dimensions of the cut-line are correct: 175 x 275 mm (67⁄8 x 1013⁄16 in) for the S4-W65 and 215 x 370 mm (81⁄2 x 149⁄16 in) for the S4-W80.
Use an appropriate tool to cut along the cut-line to create a cut-out in the wall. Trial fit the speaker Installation Frame in the cut-out to check clearances.
With the cut-out checked, the Installation Frame can be installed. Insert the frame into place and while holding it against the wall with one hand use the other hand to turn and slide the four yellow securing clamps outwards and slide them down against the inner surface of the drywall (plasterboard).
Pull the speaker cable through the Installation Frame and wall cut-out. The length of free cable should be sufficient to allow the Speaker Unit to be held in one hand while connecting the cable to the Speaker Unit terminals with the other hand.
The speaker cable can now be connected to the speaker. Strip 15 mm insulation from the cable (if necessary), twist the wire strands and insert the stripped ends into the speaker spring terminals. Ensure that the positive conductor is connected to the red speaker terminal and the negative conductor is connected to the black speaker terminal.
With the Speaker Unit connected to the speaker cable it can be inserted into the Installation Frame. Turn the locking tabs on the front surface of the Speaker Unit fully clockwise (aligned with the lock icons) and insert it in the Installation Frame. Push gently around each locking tab until a click is heard. The Speaker Unit will then be secured in the frame.
The high frequency tonal balance of the Studio Series speakers can be adjusted to suit different installation environments. A tweeter level switch located on the Speaker Unit front panel offers +3 dB, 0 dB and -3 dB options. The level adjustment operates from approximately 3 kHz upwards.
With the speaker connected and secured into the Installation Frame, in-wall speaker installation is completed by fitting the grille. The grille is secured magnetically and requires no more than placing into position.
Diagram 6 illustrates the in-wall speaker installation procedure.
 Switch to adjust tweeter level
 Push to click. Four locations. Rotate clockwise to lock. Rotate counter-clockwise to release.