Installation

Although the JBL HTI Series in- wall speakers were designed to be easily installed in existing con- struction applications, it is recom- mended that installation of the HTI88BB back box in new con- struction be reserved for profes- sionals. See the manual for the HTI88 subwoofer for instructions on installing the speaker in exist- ing construction without using the back box.

The HTI88BB back box is an optional installation accessory for the HTI88 in-wall subwoofer. When used, the HTI88BB back box is installed during new construc- tion before the wallboard.

Installation

1.Using the four flat-head screws, install the two centering bars as shown in Detail B in the draw- ings. The centering bars are for setting the depth of the enclo- sure. They also help locate the left/right position of the enclo- sure as they can be mounted into the studs on the left and right to hold the enclosure in the correct location before final mounting.

2.Using the eight #10 32 x 1" screws, install the four L-brack- ets at the four corners of the enclosure. Each of the eight screws should have both the split washer and flat washer installed; the split washer goes on first. Leave the screws a half-turn loose at first to allow for adjustment later (see Detail A). Do not screw the L-brackets to the wall studs at this time (see step 6).

3.Fit the enclosure into the wall. The bottom edge of the bottom L-brackets will rest against the baseboard 2 x 4. At this time, make note of adjustments nec- essary to square the enclosure into the wall (see Detail C).

4.After refitting and tightening the L-brackets into the enclosure (but not the wall studs yet), fit the enclosure into the wall once again.

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Detail A

L-Brackets

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Detail B

Centering Bar

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Detail C L-Brackets

Detail A

Detail B

5.At this time, you may want to screw through each side of the wood centering bars to mount the enclosure to the studs. This will help hold the enclosure in position before the L-brackets are mounted to the studs.

Detail C

6.Screw the L-brackets into the studs, using the eight wood screws.

7.Remove the wood centering bars and replace the flat-head screws into the holes left over (the holes left in the cabinet face underneath the bars are also counterbored to accept the flat-head screws).

8.The enclosure is now installed and ready for the wallboard to be installed over it.

9.Make the connections from your receiver/amplifier to the HTI88 back box connections panel, and to any other speakers as appropriate for your system, fol- lowing the instructions on the previous page. Connect the eight wires hanging from the bottom of the HTI88BB back box to the correct terminals on the HTI88 loudspeaker (see the pre- vious page).

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Detail A