Most listed models cover roughly 30 Hz to 200 Hz. Example entries show frequency responses of 30–200 Hz and 34–200 Hz.
The powered subwoofer includes both high-level (speaker) and low-level (RCA/line) inputs with specified input sensitivity, and it ships with a bass-volume remote for in-seat adjustment.
The Stage subwoofer descriptions list polypropylene woofer cones with rubber surrounds, and the listings reference high-grade, automotive-style materials for durability.
Some listings are powered with a built-in amplifier rated 150 W RMS (450 W max). Other listings are passive drivers with power-handling specs such as 250 W RMS and 1000 W peak.
Dimensions listed range from compact examples (about 12" x 12" x 2") up to larger enclosures such as 26.0" x 16.0" x 18.0" and 22-1/2" x 14-5/8" x 9-3/16". Weights range from approximately 10.55 lb to 37.25 lb.
Powered units list a bass-boost control (0 dB to +12 dB at 45 Hz) and include a bass-volume remote for adjustment. Driver-only units do not list explicit bass-boost controls in the available details.
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