Enclosure Type
Enclosure type describes the acoustic loading used for the bass driver or bass section.
Also called: Enclosure / Bass Loading
Sealed, ported and passive-radiator designs use different arrangements behind the driver. Other loading types exist; cabinet material and external shape are separate details.
Enclosure Type — Subwoofer
For a subwoofer, enclosure loading affects how the driver and cabinet work together at low frequencies. A port vents the enclosure, while a passive radiator uses an unpowered moving diaphragm as part of the loading.
Compare loading alongside measured extension and output capability rather than ranking the type alone. A passive radiator is not another powered woofer. Any stated plug or operating-mode condition matters because changing the loading arrangement can change the response.
Enclosure Type — Loudspeaker
For a loudspeaker, this field refers to the bass section, whether sealed, bass reflex, passive radiator, transmission line, horn, bandpass or open baffle as specified. The midrange can use a different acoustic arrangement.
Compare the stated bass loading with placement requirements and measured response. A front or rear port is still a bass-reflex arrangement; its position is a further detail. A cabinet-material description, driver list or way count does not by itself identify the enclosure loading.