Origin Acoustics Ambisonic ALSB85BL

The Ambisonic ALSB85BL is a luxury three-way landscape bollard speaker designed for high-end outdoor audio installations. Part of the Ambisonic Bollard Collection — a premium sub-brand of Origin Acoustics — it combines an 8" subwoofer with a 5.25" midrange and 1" HD aluminum conical ribbon tweeter in a striking hexagonal Midnight Black enclosure. The subwoofer section buries below ground, leaving only the slim hexagonal pillar exposed, which radiates sound through precision slots with uniform 360° coverage. Rated IPx5 for weather resistance and compatible with both 70V-100V and low-impedance amplifier systems, it suits luxury residential gardens, pool surrounds, and upscale hospitality outdoor spaces requiring seamless, full-range audio without visual intrusion.

True Three-Way Architecture in One Bollard

Most landscape bollard speakers rely on a two-way design that compromises either bass extension or midrange clarity. The ALSB85BL uses a true three-way system: an 8" (203mm) polypropylene woofer for low frequencies, a 5.25" (133mm) polypropylene midrange driver handling the vocal and presence band, and a 1" HD aluminum conical ribbon tweeter for detailed highs up to 20kHz. Dividing the frequency spectrum across three dedicated drivers — each working in a narrower range — reduces intermodulation distortion and delivers noticeably more accurate, layered sound. For outdoor listening across a pool area or large garden, this means music remains intelligible and natural even at elevated playback levels, rather than collapsing into congested mid-bass as the volume rises.

Ground-Buried Subwoofer, Invisible Installation

The ALSB85BL's subwoofer enclosure is designed to be buried completely below ground level, with only the hexagonal pillar sleeve protruding approximately 18 inches above the surface. This split architecture means the low-frequency driver benefits from the thermal stability and vibration damping of the surrounding earth, while the visual footprint is reduced to an elegant architectural post. For landscape architects and integrators, this eliminates the usual compromise between audio performance and visual cleanliness. The total system height is 31" (788mm) with a 15.75" diameter subwoofer enclosure buried below — making it suitable for installation alongside lighting and irrigation infrastructure without dominating the landscape design.

Buried sub. Exposed beauty. Full-range 360° sound.

Limited 5-year warranty · IPx5 weather resistance · Authorized dealer required

360° Sound Dispersion from a Single Point

Sound from both the buried subwoofer and the above-ground satellite radiates outward through precision-cut slots in the hexagonal pillar, providing uniform 360° horizontal coverage around each bollard. This omnidirectional radiation pattern is critical in outdoor installations where listeners move freely and are rarely equidistant from a speaker. A single ALSB85BL can anchor coverage for a zone rather than requiring paired directional speakers aimed across the space. For pool decks, terraces, or garden paths, this translates to consistent volume whether a listener is standing directly in front of the bollard or behind it — without hot spots or dead zones.

Dual Voltage System — 70V-100V and LoZ Flexibility

The ALSB85BL includes built-in transformers with selectable tap settings (50W at 70V, 50W at 100V, or LoZ bypass), supporting both commercial distributed audio systems and standard residential low-impedance amplifiers. For larger outdoor installations covering multiple zones, the 70V-100V mode allows up to four bollards per PROA250.2 amplifier channel with long cable runs and minimal signal loss — a major practical advantage when covering a large property. LoZ mode is available for smaller setups (maximum two bollards per amplifier). The tap switch is accessible before burial, making it essential to confirm the system architecture during the design phase. This flexibility makes the ALSB85BL equally at home in a residential luxury project and a boutique hotel or restaurant terrace.

IPx5-Rated, Anodized Aluminum Construction

The hexagonal sleeve is anodized aluminum — a process that bonds the color into the metal surface rather than coating it — giving the Midnight Black finish exceptional resistance to UV fading, corrosion, and surface wear over years of outdoor exposure. The overall enclosure uses a poly composite material rated IPx5, meaning it withstands low-pressure water jets from any direction, covering rain, sprinkler overspray, and hosing down during patio cleaning. Note that the manual specifies the speaker should not be placed within 2 inches of direct sprinkler spray into the driver slots; proper placement planning during installation avoids this limitation. The result is a speaker that holds its appearance and performance in temperate, subtropical, and coastal climates without requiring seasonal covers or removal.