Ceiling Microphone Array
Stem Ceiling is an innovative microphone array that can be easily mounted on the ceiling of your conference room. With multiple beam settings to choose from, Ceiling enables you to create the perfect high quality coverage for every meeting room.
Product Code:CEILING1
Mix & Match: Mix and match all Stem devices until your room is completely covered.
Networkable: Control and manage the Stem Ecosystem securely on your network.
Compatibility: Stem solutions are compatible with your favorite video conferencing platforms.

We’ve Got You Covered
With 100 microphones and three array options, no one gets left out of the conversation.

Audio Fencing
Here’s the end-all for noisy offices and busy streets making their way into your important meetings. Stem Ceiling’s audio fencing mode completely removes outside noise and unwanted distractions to keep the focus on what’s important, picking up everyone in the room perfectly.

3 Step Setup
With the Ecosystem, anyone can easily get their meeting room up and running in just 3 simple steps.
- Step 1: Place your Stem device in the room
- Step 2: Connect your device to your network
- Step 3: Assign your device to the room

Low Profile or Chandelier?
With two options to choose from, you can either show off your ceiling conferencing microphone with chandelier mode or keep your audio incognito with the option to ceiling mount the device in low profile mode.

What’s On The Inside?

Know When Your Voice Is Picked Up
Stem Ceiling’s LED light ring lets you know when the device is active and on mute so you know when you’re heard and when you’re not.

Power To The People
All Stem solutions connect via Power over Ethernet (PoE+) making installation easier than ever. Running cables to power your products will never be an issue again.

• 100 built-in microphones create a wide, medium, or narrow beam to cover the room or a specific area as needed.
• Audio fencing mode completely removes outside noise and unwanted distractions (available in narrow beam setting only).
• Built-in digital signal processing includes state-of-the-art acoustic echo cancellation, automatic gain control, noise cancellation, and de-reverberation algorithms.
• Automatic confi guration and control with Stem Ecosystem platform.
• LED light ring indicates when the device is active, muted, and other statuses.
• Compatible with leading video conferencing platforms.
• Directly connect the standalone device to a PC via USB or use Stem Control Touch Controller to integrate a Stem Ecosystem room solution for video conferencing.
• Power over Ethernet (PoE+).
• Dual mounting options: Low profi le with square mount or suspended in chandelier mode.

Connector Type: RJ45 and USB Type B
Power Requirements: Power over Ethernet Plus (PoE+) 802.3 at Type 2
Control Application: Stem Ecosystem Platform
- Microphone: 9 lbs (4.1 kg)
- Square Ceiling Mount: 7.5 lbs (3.4 kg)
Product Dimensions
- Microphone: 21.5 x 1.75 in (54.6 x 4.4 cm) D x H at center;
- H at edge: 0.5 in (1.8cm)
- Square Ceiling Mount: 23.5 x 23.5 x 1.25 in (59.7 x 59.7 x 3.2 cm) L x W x H
- Suspension Cable Length: 120 in (304.8 cm)
Operating Temperature Range: −6.7°C (20°F) to 40°C (104°F)
Storage Temperature Range: −29°C (-20°F) to 74°C (165°F)

Beam Width: Narrow (20 degrees), Medium (45 degrees), Wide (60 degrees)
Frequency Response: 50 Hz to 16 kHz
Built-in DSP: Automatic Voice-Level Adjustment (AGC); 100% Full Duplex, no attenuation in either direction
Noise Cancellation: >15dB (without pumping noise)
Acoustic Echo Cancellation: >40dB with conversion speed of 40dB/sec; residual echo is suppressed to the environment noise level, preventing artifi cial ducking of signal; High-end performance conforms to ITU-T G.167
  • 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