Four tools, each built on the same rule: manufacturer-published data and published standards only, with the arithmetic shown and the gaps left visible. None of them asks you to trust anyone’s ears.
System Headroom Calculator
Pick your speakers and your amplifier. See the peak level your system actually reaches at your seat, measured against a real calibration standard.
Atmos Layout & Amp Assignment Planner
Enter your room. See where every speaker goes, whether your receiver can actually drive the layout, and which channels need an outboard amplifier.
System Builder
Give it a budget, a layout and your seat. It searches every priced model in the database, assembles the system that reaches highest, and shows the arithmetic that chose it.
The Gear Database
Specifications transcribed from each manufacturer’s own published source, with the measurement conditions attached, the cross-brand incompatibilities flagged, and the gaps left as gaps.