PreSonus PRM-1 Precision Reference Microphone

The PRM1 Precision Reference Microphone is a special type of microphone that provides an accurate reproduction of a room's sound characteristics for use with audio-analysis tools. It employs a ¼-inch, pre-polarized, electret-condenser capsule with an omnidirectional polar pattern, which allows the microphone to measure reflections, as well as direct signals up to 132 dB SPL. The PRM1 has an all-metal chassis and comes with a clip, foam windscreen, and hard case.

Unlike mics you use for recording and live sound, the PRM1 has a narrow dynamic range, since it is intended to receive test frequencies, such as pink noise, at a fixed level. As a result, it is not recommended for recording or performance-but it’s the right mic for analyzing a sound system’s performance. The PRM1 exhibits linear (“flat”) frequency response between 20 Hz and 20 kHz, meaning it captures all frequencies equally within that range. Since it neither boosts nor cuts frequencies, it doesn’t color the sound, making it ideal for measuring what a room or speaker is doing to a sound system’s outgoing signal.

While the PRM1 can be used for a variety of measurement applications, such as MLSSA, Spectrafoo, and TEF, it is especially recommended for use with the Smaart System Check wizards that are integrated into PreSonus UC Surface control software for StudioLive AI and StudioLive RM mixers. With this combination, you can have a complete, powerful, and affordable, audio analysis and correction system.

Key Features

• 1/4-inch, pre-polarized, electret-condenser capsule
• Linear frequency response between 20 Hz and 20 kHz
• Omnidirectional polar pattern
• Low noise, low distortion
• All-metal chassis
• Comes with a clip, foam windscreen, and hard case
• High-quality components and rugged construction
• Suitable for system analysis and measurement
• Especially recommended for use with PreSonus StudioLive mixers and UC Surface control software with Smaart Measurement Technology

Technical Specifications

Type
Back-electret condenser
Element
Pressure, FET preamplifier
Polar Pattern
Omnidirectional
Performance
Frequency Response
20 Hz to 20 kHz
Sensitivity (@ 1 kHz open-circuit voltage)
-37 dB/Pa (14 mV/Pa) 1 Pa=94 dB SPL
Rated Impedance
200Ω
Minimum Load Impedance
1,000Ω
EIN (A-weighted)
26 dB
Max. SPL (1 kΩ load)
132 dB SPL (THD ≤ 1%, 1 kHz)
Dynamic Range (1 kΩ load)
106 dB
S/N Ratio
70 dB
Connections
Polarity
Pin 2 output positive voltage (relative to Pin 3) when diaphragm receives positive pressure (moves inward)
Connector
3-pin XLR Male
Power
Phantom Power
9-52V
Current Consumption
2 mA
Physical
Length
7.56” (192 mm)
Width
0.83” (21 mm)
Weight
5.3 oz (150g)
Finish
Metal, matte black
Environmental Conditions
10-50 Degrees C, humidity 0-95%