PRM1 vs PD-70: Which PreSonus Microphone Fits Your Studio?
By PreSonus | Wherever sound takes you. | Published: 2026-10-17
Category: Comparisons
The PRM1 and PD-70 solve different problems. This comparison breaks down polar patterns, frequency response, and use cases so you can pick the right PreSonus mic for your studio.
Quick answer
Choose the PRM1 if you need an omnidirectional, linear measurement microphone for room analysis or calibration. Choose the PD-70 if you need a dynamic microphone for close-miking vocals, instruments, or podcasts. They are not interchangeable: the PRM1 captures the room without coloring it, while the PD-70 is built for direct sound capture.
What each microphone is designed to do
The PRM1 Precision Reference Microphone is a special type of condenser microphone that provides an accurate reproduction of a room's sound characteristics for use with audio-analysis tools such as real-time analyzers (RTAs) and spectrographs. It has an omnidirectional polar pattern and exhibits linear frequency response between 20 Hz and 20 kHz, so it won't color the sound. This makes it a measurement tool, not a vocal or instrument mic.
The PD-70 is a dynamic microphone. It is designed for close-miking applications where you want to capture a focused source, such as a voice or an instrument, while rejecting background noise. Dynamic mics like the PD-70 are rugged and handle high sound pressure levels well, making them a common choice for podcasting, live sound, and studio recording of loud sources.
Polar pattern and frequency response: the key differences
The PRM1's omnidirectional polar pattern picks up sound equally from all directions. This is essential for room analysis because you need to capture the total sound field, including reflections. Its linear frequency response from 20 Hz to 20 kHz means it does not boost or cut any frequency range, so the data you see in your analysis software reflects the actual room, not the microphone's character.
The PD-70's polar pattern is not specified in the supplied catalog facts. However, as a dynamic microphone, it is typically designed with a directional pattern (cardioid or similar) to focus on the source and reduce room pickup. Its frequency response is also not listed, but dynamic mics generally have a tailored response for voice or instruments. Without those specifications, you should rely on your ears or the manufacturer's documentation to judge its suitability for a specific source.
How to choose between them
If your goal is to measure or correct your room's acoustics, the PRM1 is the clear choice. It pairs with software like PreSonus UC Surface multi-touch mixer-control software to help you analyze and adjust your monitoring environment. Using a vocal mic for this task would give you misleading data.
If your goal is to record a voice, a guitar cab, a snare drum, or a podcast, the PD-70 is the appropriate tool. Its dynamic capsule is built to handle close-miking and high SPLs. Using the PRM1 for these tasks would capture too much room sound and lack the directional focus you need.
In short, the PRM1 is for the room; the PD-70 is for the source. Many studios own both because they serve opposite ends of the recording and monitoring workflow.
Trade-offs at a glance
- PRM1: measurement accuracy vs. creative use: The PRM1's omnidirectional pattern and linear response are perfect for room analysis but make it unsuitable for isolating a voice or instrument. You gain accurate data but lose the ability to focus on a single source. Buy the PRM1 only if you need room measurement or calibration.
- PD-70: source focus vs. room capture: As a dynamic mic, the PD-70 is designed for close-miking, which rejects room sound and background noise. This is great for vocals and loud instruments but means you cannot use it to analyze a room's acoustics. Buy the PD-70 if your priority is recording or amplifying a specific source.
- Budget and workflow: The PRM1 and PD-70 serve different roles, so they are not direct competitors. If you need both room analysis and source recording, you will likely need both microphones. If you can only choose one, decide whether your immediate need is measurement or recording. Match the mic to your task, not to a generic 'best' label.
Product facts
- PRM1 Precision Reference Microphone: The PRM1 is a special type of condenser microphone that provides an accurate reproduction of a room's sound characteristics for use with audio-analysis tools such as real-time analyzers (RTAs) and spectrographs. This makes the PRM1 a measurement mic, not a vocal or instrument mic. It is the right tool for room calibration and acoustic analysis.
- PRM1 Precision Reference Microphone: It has an omnidirectional polar pattern and exhibits linear frequency response between 20 Hz and 20 kHz, so it won't color the sound. Omnidirectional pickup and flat response ensure that your analysis software sees the room's true behavior, not the microphone's tonal signature.
- Eris® 3.5BT 2nd Gen (Pair): Eris 3.5BT media reference monitors deliver studio-quality sound in an elegant, compact form factor that makes them ideally suited for bedroom studios, video production, and high-fidelity gaming setups. If you are setting up a small studio, these monitors are a natural companion to either microphone, but they are especially useful when paired with the PRM1 for room analysis and monitoring.
Which should you choose?
Best for
- Audio engineers and producers who need to analyze room acoustics with RTA or spectrograph software
- Home studio owners calibrating monitor placement and room treatment
- Users of PreSonus UC Surface who want accurate room data
Not for
- Recording vocals, podcasts, or instruments where you need directional pickup
- Live sound reinforcement where feedback rejection is critical
- Anyone looking for a single microphone to handle both measurement and recording tasks
