Polk Audio Atrium SUB100

Bass integrated into the garden

The single Polk Audio Atrium SUB100 is a passive outdoor subwoofer with a long-throw 10" driver and dual voice coils. Its low, rounded enclosure can sit among plants or on a stable surface, adding bass to an outdoor speaker system.

This is not a wireless soundbar sub: it requires speaker cable and amplified channels. Dual voice coils and an internal low-pass network allow connection within a compatible stereo installation; plan wiring and polarity before running cables outdoors. It is matched to separately purchased Atrium Sat 300 speakers.

Key features

• One downward-firing 10" dual-voice-coil driver
• Passive, with low-pass network and speaker-cable wiring
• 50-110 Hz at -3 dB; 10-200 W recommended per channel
• 428 x 279 x 428 mm; grille and junction box included

Placement and connections

The driver faces downward and needs clear space beneath the cabinet. On soft soil or mulch, use a firm base so earth and leaves cannot block the opening. A protective grille and outdoor junction box are included. Dimensions are approximately 428 x 279 x 428 mm.

The -3 dB range is 50-110 Hz and recommended amplifier power is 10-200 W per channel. That power figure describes amplifier matching, not a built-in amplifier. The colour-impregnated, paintable enclosure blends into landscaping; choose a position reachable by a protected cable route.

The four conductors on the attached cable belong to the driver's two voice coils; they do not represent four separate channels. With two Sat 300 satellites, SUB100 can be wired into the two-channel system using the specified connection layout. Its included junction box helps protect an outdoor connection.

Its low cabinet differs from an upright indoor subwoofer: it can sit on decking or in a planting bed with a firm base. Do not cover the underside, and leave practical access to wiring and cleaning. This listing contains one SUB100; satellites are separate products.