For clear conference audio, keep microphones close to talkers, aim speakers at the audience, and run the signal through a mixer or DSP.
For the full breakdown, see our best Conference Speaker and Microphone guide.
Most conference rooms sound bad because the microphones and speakers are fighting each other, not because the gear is cheap. Fix placement first and everything else gets easier. This step-by-step conference speaker and microphone setup guide covers the placement rules, wiring order, power-up sequence, and audio settings that make speech clear. If you are shopping rather than troubleshooting, our tested conference speaker and microphone roundup lists the systems worth buying.
Loudspeakers belong in front of the audience, aimed across the seating area, so the direct sound reaches listeners before reflected sound does. That one habit improves intelligibility more than any EQ change.
Mic and Speaker Placement That Prevents Feedback
Place microphones close to talkers and keep loudspeakers at the front of the room, away from the mics’ pickup patterns. That single step stops most feedback problems before they begin.
- Table mics: roughly 2 feet (0.6 m) from the presenter.
- Ceiling mics: descend to no more than about 5 feet (1.5 m) above the person speaking.
- Speakers: front wall, flanking the display, at ear level, angled down 15–20 degrees so remote voices appear to come from the screen area.
- Separation: keep speakers at least 6–8 feet from microphones where possible; feedback risk drops sharply.
- Directionality: use directional mics and aim them so the wanted voice is on-axis and unwanted sound falls into the pickup null.
- Open mics: use as few as possible, because each open microphone adds feedback and noise pickup.
Move presenters closer to their mics and keep gain moderate; that gives you headroom before feedback starts. Shure’s guide to microphone and speaker placement in a conference room goes deeper on these targets.
Wiring, Power-Up Order, and System Settings
The signal chain follows a fixed order: place speakers, connect the mixer, plug microphones into the mixer, run mixer outputs to the speakers, then power on and test. Power sources first, then the console, then amplifiers.
For video conferencing rooms, the same logic applies: pull and label cable runs, test continuity, mount the display, put the camera at eye level, mount ceiling or table mics, install ceiling speakers if used, then connect and power the compute unit or codec. Label every cable and channel as you go; a labeled setup is far easier to troubleshoot mid-meeting. When wired conference speakerphones are in use, set the computer or flat panel to select the speakerphone as both the microphone and the speaker device.
Once connected, enable the DSP chain for the room: acoustic echo cancellation, automatic gain control, and noise suppression. This processing is what makes remote voices sound like they are coming from the display area rather than from a speaker in the corner.
Room Acoustics and Tuning for Clear Speech
Hard glass and bare walls add reverberation that makes speech muddy. Acoustic treatment is the direct fix: add sound-absorbing panels to walls and windows, then aim for the targets in the table below.
| Target | Recommended Value | Notes |
|---|---|---|
| Mic-to-talker distance | About 2 ft (0.6 m) | For tabletop microphones |
| Ceiling mic height | No more than 5 ft (1.5 m) above talker | Descend toward the speaker |
| RT60, small room | 0.4–0.6 seconds | Measured in mid-frequencies |
| RT60, medium room | 0.6–0.8 seconds | For larger conference spaces |
| STI (speech transmission index) | 0.6–0.75 | Higher means clearer speech |
| Ambient noise | Below 35–40 dBA | Reduce HVAC and equipment hum |
| SPL variation across seating | Within ±3 dB | Keeps volume even for all listeners |
Test with real people, not just test tones. Have a presenter speak from their actual seat, check the audio settings in Zoom, Microsoft Teams, or Google Meet, and run a test recording. For wireless systems, check frequencies roughly 24 hours before the event so interference has time to surface. If a squeal appears during the test, move the microphone away from the speaker or lower the mic volume.
Set up in this order every time: place mics close to talkers, aim speakers away from them, add absorbing panels if the room is live, wire sources to the mixer, power on sources before the console and amps, and finish with a test using a real speaking voice. That routine solves more conference room problems than any box of gear will.
FAQs
Why does my conference setup squeal?
A high-pitched squeal means the loudspeaker output is re-entering a microphone and looping. Move the microphones farther from the speakers, lower the mic volume, or switch to directional mics with their nulls aimed at the speakers.
How far should a speaker be from a microphone?
Keep loudspeakers at least 6 to 8 feet from the nearest microphone where the room allows. Also aim speakers away from the mic pickup pattern and angle them down 15 to 20 degrees to reduce feedback risk further.
Do I need acoustic treatment for a small conference room?
If the room has large windows, bare walls, or high ceilings, yes. Absorbent panels cut reverberation and improve speech intelligibility. The target is an RT60 of 0.4 to 0.6 seconds in a small room, measured in the mid-frequencies.
References & Sources
- Shure. “A Guide to Microphone and Speaker Placement in Your Conference Room.” Official guidance on mic and speaker placement, spacing, and feedback control.