Shure Stem Ceiling

Stem Ceiling is a state-of-the-art ceiling microphone array that mounts above the conferencing space to deliver clear, intelligible audio while keeping technology out of sight. With 100 built-in microphones and selectable narrow, medium and wide beam settings, it can cover an entire room or focus on a specific area as needed.

In narrow beam mode, audio fencing can be enabled to remove outside noise and distractions, keeping conversations clear even in open or noisy environments. Built-in digital signal processing provides automatic voice-level adjustment, full-duplex audio with no attenuation, advanced noise cancellation, de-reverberation and high-performance acoustic echo cancellation that conforms to ITU-T G.167.

Stem Ceiling integrates into the Stem Ecosystem platform for automatic configuration, control and monitoring. An LED light ring shows activity and mute status, while PoE+ support and RJ45 connectivity simplify installation. The device can connect directly to a PC via USB for use with leading video conferencing platforms or be combined with Stem Control and other Stem devices as part of a complete room solution.

Dual mounting options – low-profile in a square ceiling mount or suspended in “chandelier” mode – help it blend into a wide variety of room designs.

Key features:

• Ceiling microphone array that keeps tech out of sight
• 100-mic array with selectable narrow, medium, wide beams
• Audio fencing to block outside noise in narrow mode
• Built-in DSP with AEC, AGC, noise and reverb reduction
• PoE+ and RJ45 for single-cable power and control
• USB connection for direct PC use with UC platforms
• Low-profile or suspended mounting to fit any room style

General

• Product type: ceiling microphone array
• Control application: Stem Ecosystem Platform
• Connectors: RJ45 and USB Type-B
• Power: Power over Ethernet Plus (PoE+) IEEE 802.3at Type 2

Dimensions & Weight

• Microphone unit: 21.5 × 1.75 in (54.6 × 4.4 cm) diameter × height at center
• Height at edge: 0.5 in (1.8 cm)
• Square ceiling mount: 23.5 × 23.5 × 1.25 in (59.7 × 59.7 × 3.2 cm) L × W × H
• Suspension cable length: 120 in (304.8 cm)
• Microphone weight: 9 lb (4.1 kg)
• Square ceiling mount weight: 7.5 lb (3.4 kg)

Environment

• Operating temperature: −6.7 °C (20 °F) to 40 °C (104 °F)
• Storage temperature: −29 °C (−20 °F) to 74 °C (165 °F)

Audio

• Number of microphones: 100
• Beam width options: Narrow 20°, Medium 45°, Wide 60°
• Frequency response: 50 Hz to 16 kHz
• Built-in DSP: automatic voice-level adjustment (AGC), 100% full duplex
• Noise cancellation: >15 dB (without pumping noise)
• Acoustic echo cancellation: >40 dB, 40 dB/sec convergence, residual echo suppressed to room noise level; conforms to ITU-T G.167

Mounting & Installation

• Dual mounting options: low-profile with square ceiling mount or suspended mount
• LED light ring for active, muted and status indication
• Networked control and configuration via Stem Ecosystem

Accessories (included)

• CAT 6 Ethernet cable, 15 ft (4.6 m)
• USB Type-A to USB Type-B cable, 12 ft (3.7 m)
• Square ceiling mount
• Suspension kit
• Gripple kit