Zoned Biamp Audio Keeps Adelaide Tower Quiet

Premium office towers often need background audio that feels present without pulling focus. At 30 Pirie Street the brief called for music that sets a tone in public spaces yet leaves speech clear, plus mechanical masking in the bike store, all with almost no daily tuning. Integrators face this mix regularly: first-impression zones next to functional ones, strict finish requirements, and owners who want the system to run itself after handover.

Signal Routing Across Four Zones PTP divided

the building into foyer, atrium, rear entrance and bike storage. Pendant Desono units cover the atrium height while in-ceiling models stay flush elsewhere. Voltera D-series amplifiers sit on a Tesira backbone that handles both distribution and per-zone EQ. Technicians mounted the Voltera amps in the existing comms room rack with 1U spacing and confirmed the 48 V PoE draw stayed under 180 W per unit before terminating the shielded Cat6 runs. The bike storage path needed extra low-frequency energy to mask HVAC without raising level. Tesira's matrix let the team create that curve once, then lock it so later volume changes would not undo the masking. They routed the bike zone through a dedicated 150 Hz low-shelf filter set at +4 dB while the other three zones stayed flat below 80 Hz.

Speaker Placement Challenges

Atrium pendants required two extra suspension points because the ceiling grid sat 400 mm higher than the reflected ceiling plan showed. The team swapped to 3 m aircraft cable and added a secondary safety wire after the first mock-up hit the height limit on the scissor lift. In-ceiling units in the foyer went into 200 mm cutouts that already existed from the previous paging system, saving core drilling time.

Control Simplicity vs Automation Depth An

Apprimo touch panel gives concierges three zone sliders. Every morning the Biamp Workplace scheduler resets those sliders and restarts the playlist, so drift from manual tweaks never accumulates. The reset happens at 06:15, five minutes before the first scheduled playlist entry. Concierges can still raise any slider during the day, but the system returns to the stored preset at the next scheduled interval. Labor hours for training dropped to near zero. The same platform logs schedule adherence, which matters when the owner later reviews service contracts.

Retrofit Flexibility on Existing Network The owner asked

for room to add tenant spaces later. Because the backbone is already networked, adding a zone means extending the Tesira link and loading a preset rather than new conduit runs. The existing VLAN carried both control and audio; the team simply reserved two more multicast addresses in the switch configuration for future endpoints. One practical check during commissioning: run a full-day schedule on a spare machine first to confirm the reset logic matches the building's actual occupancy pattern.

Field Scenario and Commission Notes In

the bike storage, speech remained intelligible

at normal conversation distance once the masking curve was set. The same preset failed in the atrium until the team raised the high-pass to keep music from competing with voices near the reception desk. Final acoustic verification used an NTI XL2 meter at 1.2 m height; they trimmed a 200 Hz dip by 2 dB across the atrium zone before signing off.

Integrator Takeaway

Budget line items should separate DSP programming time from speaker placement. The three-slider interface saved roughly two days of on-site training, but only after the schedule and reset logic were validated off-site. Documenting the exact multicast address list and the locked EQ curves now sits in the as-built package so the next technician can replicate the masking response without re-measuring the entire floor.