Detail 01
Omnidirectional pattern
Picks up evenly all around, so one mic covers talkers on both sides of a table. Also picks up more room noise.
Product detailSKU #1274034493996
ShureMX393/O Low Profile Boundary Mic Cardioid
Independent shopping perspective
The Korena take
Boundary mic for conference tables, lecterns and altars. Sits flat on the surface and picks up talkers seated around it. Needs phantom power.
Strong match
Who this is for
- Conference room tables where a mic stand would block sightlines
- Fixed installs feeding a mixer with 48V phantom
- Courtrooms, council chambers, boardrooms with several seated talkers
Consider the trade-offs
When to look elsewhere
- Recording music — 50 Hz to 17 kHz drops the low end
- Anyone needing plug-and-play USB into a laptop
- Handheld or stand-mounted use of any kind
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
50 Hz to 17 kHz response
Tuned for speech. Rolled off low end keeps HVAC rumble and table thumps out of the signal.
Detail 03
11 to 52 Vdc phantom, 2.0 mA
Runs off any standard mixer or interface phantom supply. No battery, no separate power brick.
Detail 04
45 dB minimum common mode rejection
Balanced output rejects hum picked up on long cable runs through a building. Matters for permanent installs.
Detail 05
50 dB switch attenuation
The mute switch actually kills the signal rather than just dropping it, so no bleed when muted.
Detail 06
17.5 dB A-weighted self noise
Quiet enough that the mic itself won't be audible under a talker in a quiet room.
Final check
Know before you order
- 01Needs a phantom-powered mixer or interface — no phantom, no signal
- 02Low profile means it must sit on a hard flat surface to work
- 03Confirm the cable exit and mounting suit your table before drilling
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Does this need phantom power?
Yes. It runs on 11 to 52 volts phantom and draws 2.0 mA. Any standard mixer or audio interface with 48V will power it.
02How many people can one mic cover?
The omnidirectional pattern picks up evenly in all directions, so a single unit covers talkers seated around it on a table rather than one seat.
03Can I use it for recording vocals or instruments?
It's built for speech. Response stops at 50 Hz on the bottom, so low-end on voice and instruments won't be captured fully.
04Will it work outdoors or in a hot room?
It's rated from 0 to 135 degrees F and up to 95% relative humidity, so heat and humidity are handled. There's no weatherproofing for rain.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
2 detailsSound
- Polar Pattern
- Omnidirectional
- Frequency Response
- 50 to 17,000 Hz
3 detailsPickups & controls
- Switch Attenuation
- 50 dB minimum
- Preamplifier Output Clipping Level
- ”6 dBV (0.5 V)
- Sensitivity At 1 KHZ Open Circuit Voltage
- ”22.0 dBV/Pa (79.4 mV) 1 Pascal=94 dB SPL
1 detailsBody & build
- Color
- Black
2 detailsConnections & power
- Output Impedance
- EIA Rated at 150 Ohms(180 Ohms actual)
- Power Requirements
- 11 to 52 Vdc phantom; 2.0 mA current consumption
1 detailsSize & weight
- Equivalent Output Noise A Weighted
- 17.5 dB
6 detailsOther
- Common Mode Rejection
- 45 dB minimum, 10 Hz to 100 kHz
- Dynamic Range
- 94.0 dB
- 1 Kohm Load
- 111.5 dB
- Signal to Noise Ratio Referenced At 94 DB SPL
- 76.5 dB
- Polarity
- Positive sound pressure on diaphragm produces positive voltage
- Environmental Requirements
- Operating Temperature Range: ”18 degrees C to 57 degrees C (0 degrees F to 135 degrees F); Relative Humidity: 0 to 95%
