Car audio engineering has wrestled with packaging constraints for decades. Low-frequency sound requires displaced air. To produce physical, distortion-free notes below 40 Hz, an audio engineer must provide the speaker cone with sufficient internal cabinet volume. In typical luxury sedans, that demand results in compromises. Manufacturers either seal a shallow 8-inch driver into a plastic tub beneath the trunk liner, or mount free-air woofers to the flimsy metal of the rear parcel shelf.
Both approaches fail acoustic purists. Parcel-shelf setups vibrate surrounding body panels, producing muddy mid-bass peaks. Trunk enclosures, meanwhile, steal valuable luggage capacity and force sound waves through dense rear seats, creating phase alignment issues that dull transient response. Rolls-Royce rejected both compromises outright when drafting the specifications for its bespoke in-house sound platform.
