Whole-home audio turns your house into a single soundstage. If you buy a decent system now, it should last a decade. The trick is avoiding the hype of the newest release. We want to focus on hardware that stays in sync and sounds good regardless of which room you walk into.
Tech brands usually drop new speakers in the fall. That is when retailers slash prices on last year's gear to clear shelf space. You get the same build quality and software support for a fraction of the sticker price, which is the smartest way to build a system that covers your entire floor plan.
The introductory rate eventually expires. If you have not paid off the full balance within the 18-month window, the remaining amount will start accruing interest at the standard rate.