Integrators report rising demand for the Sennheiser TeamConnect Ceiling 2 in mid-size meeting rooms where owners want exposed services and coffered ceilings. The array uses 28 capsules with adaptive beamforming to cover up to six talkers across a 6-meter radius at typical 2.7-meter mounting heights. In closed tile ceilings the unit delivers predictable cardioid patterns with 10-12 dB rear rejection, but open coffers change the acoustic boundary conditions and force changes in both placement and commissioning time.
Each coffer cavity acts as a partial reflector, sending delayed energy back into the array’s pickup lobes. Field measurements on three recent projects showed comb-filter notches between 1.8 kHz and 3.4 kHz when the array sat 400 mm below the coffer plane. Sennheiser’s DSP preset for “high ceiling” reduces some of the ringing, yet installers still add 3-4 dB of targeted parametric cuts at 2.2 kHz and 2.8 kHz after measuring with a calibrated microphone at ear height. These adjustments add roughly two hours of tuning per room compared with a flat-tile install.
Placement Rules and Added Labor on Site
Contractors now follow a two-step layout process. First they model the coffer grid in the architectural drawings to avoid centering the array directly under a 600 mm void; a 300 mm offset toward a solid beam reduces first-reflection delay from 4 ms to under 1.5 ms. Second, they verify the chosen location with a quick walk-test using the TeamConnect Ceiling 2’s built-in noise generator and the Sennheiser Control Cockpit app. The extra modeling and verification steps typically add six to eight labor hours per room and require one extra site visit before final cabling.
Dante routing remains unchanged, yet latency budgets tighten because some rooms now need a separate acoustic echo canceller downstream to handle the longer reflection tails. One integrator quoted a $1,200 adder per room for the extra DSP channel and commissioning when open coffers are present. Material costs stay similar—$3,800 street price for the array plus standard tile-bridge hardware—but acoustic treatment in the form of 50 mm fiberglass inserts above the array adds another $450 in parts.
Technicians also adjust the beam-tracking hold time from the default 800 ms to 1,200 ms to prevent the system from chasing reflected energy when a talker pauses. This setting change is stored in the room preset and pushed via the network, yet it must be validated again after furniture is placed because absorption from seating alters the reflection balance.
Looking ahead, manufacturers are testing arrays with per-capsule height sensors and real-time reflection mapping that could auto-adjust beam weights during install, cutting the current two-hour tuning window in half on irregular ceilings. Integrators expect firmware updates within the next product cycle that expose these parameters through existing Dante Domain Manager profiles rather than requiring new control hardware.
Integrators also report measurable drops in speech transmission index when early reflections exceed 8 ms. In one 8 m × 6 m boardroom with 400 mm coffers, STI fell from 0.78 to 0.61 at the far end of the table until fiberglass inserts and the 2.2 kHz parametric cut were added. Restoring the index required an average 4 dB reduction in array gain, which in turn forced the noise floor of the downstream DSP to be lowered by the same amount to keep SNR above 22 dB. The net result is tighter headroom management during hybrid meetings when multiple codecs are running simultaneously.
Training has become another hidden cost. Most commissioning engineers are accustomed to flat-ceiling workflows and initially misread the extended hold-time values as microphone faults. Sennheiser has therefore begun offering a 90-minute online module focused on coffer acoustics; early adopters say the course pays for itself on the second project by eliminating repeat site visits. Several regional rep firms now include a coffer-layout checklist in their bid packages, reducing RFIs during the submittal phase by roughly 30 percent.
Despite the added steps, owners continue to specify the TeamConnect Ceiling 2 because the exposed services aesthetic remains a strong leasing driver. The incremental $1,650 per room is still lower than the cost of recessed linear arrays or multiple boundary mics, and the single-cable Dante connection simplifies future reconfigurations when tenants change. As long as the two-hour tuning window and the extra modeling visit are scheduled early, most projects close on time and within the revised budget.
