Installation Into A Wall Without A Backbox - Martin Logan INSTALLER Sreie Manuel De L'utilisateur

Installation Into A Wall Without A Backbox

IMPORTANT! If installing a subwoofer into a backbox.
Instructions for installing your subwoofer into a backbox were provided with the backbox.
If you no longer have the instructions, follow the instructions on the preceding page.
Stiffening and Strengthening the Cavity
Although MartinLogan in-wall mounting systems are some of the most rigid on
the market, when installing your subwoofer directly into a wall to help avoid bass
vibrations and minimize acoustic bleed-through, we recommend the following:
• Additional cross-bracing will further stiffen the cavity. Without substantially reducing
the size of the cavity, we suggest placing two to three pieces of 2˝ x 4˝ stud within
the cavity, evenly spaced above and below the cutout. Additional bracing can
also be sandwiched to the studs/joists on either side of the subwoofer.
• New construction offers an excellent opportunity to strengthen and stiffen the
cavity with additional bracing or construction-grade stiffening adhesives applied
directly to the drywall. (See Dealer for more information.)
1. Mounting
Keeping in mind the recommendations above, place mounting template onto wall.
Cut hole as indicated in Fig. 3a.
Damping Material and Other Acoustic Treatments
To ensure optimal results, do not compact damping material during the damping
process described below. Additional soundproofing treatments (see Dealer for more
information) can be used against the back wall of the cavity or above and below the
cutout on the inside front of the wall.
For optimum performance, loosely place a minimum of...
• Two pieces, 8˝ (20 cm) to 12˝ (30 cm) long, of standard fiberglass insulation
in the wall. R-12 for 2˝ x 4˝ (5 cm x 10 cm) walls or R-20 for 2˝ x 6˝ (5 cm x
15 cm) walls. Place one piece just above and just below the mounting hole;
• A half-thick piece of fiberglass insulation, the same height as the subwoofer,
in the wall directly behind the mounting hole, allowing enough space for the
subwoofer to properly recess into the cavity.
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