This installation accessory, when used with the appropriate IS Enclosure, is intended as a durable, reliable space preserver on multi-phase projects. The brackets attach to a Sonance Invisible Series Enclosure and install into the desired speaker location during rough in. Once the project is at the final installation phase, the Sonance IS-PB is removed from the enclosure and the IS speaker is installed. IS Pre-Construction Brackets can be saved and reused for future installations, as needed. IS-PB models are not compatible with 70V IS models or IS Subwoofers where the enclosure is a permanent part of the speaker. In those instances, a standard IS Space Saver can be leveraged.