Boston Acoustics Rally RX47 Installation Instructions Manual page 11

1. Trace the template onto the mounting panel. Mark the pilot hole,
the edges of the large cutout and the locations of the screws.
2. Make sure that the mounting surface provides a complete air seal
between the front and the back of the speaker. If the surface is
uneven, or if air can leak directly from the back of the speaker to the
front, seal the air leaks with silicon sealant or weather stripping. Make
sure that the sealing material does not touch any moving part of the
speaker.
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