PM40 - Microphone Earthworks - Free user manual and instructions
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| Product Type | Boundary Layer Microphone |
| Brand | Earthworks |
| Model | PM40 |
| Category | Microphone |
| Polar Pattern | Omnidirectional |
| Frequency Response | 40 Hz – 40 kHz |
| Impedance | 25 Ω (balanced) |
| Sensitivity | −35 dB re 1 V/Pa (17.8 mV/Pa) |
| Maximum SPL | 140 dB SPL (1% THD) |
| Self Noise | 20 dB SPL (A-weighted) |
| Signal-to-Noise Ratio | 74 dB (A-weighted, 94 dB SPL) |
| Connector | 3-pin XLR (male) |
| Power Requirement | Phantom power 48V ±4V |
| Operating Temperature | −10°C to 50°C |
| Dimensions (Diameter) | 1.2 inches (30.5 mm) |
| Dimensions (Height) | 0.5 inches (12.7 mm) |
| Weight | 0.09 lb (42 g) |
| Material | Brass with nickel plating |
| Applications | Studio recording, theater, conference, boundary layer pickup |
| Cleaning Instructions | Wipe with dry cloth; avoid liquids. Use soft brush for grille. |
| Safety Precautions | Do not expose to moisture or extreme temperatures. Use only with phantom power. |
| Spare Parts Availability | Contact Earthworks or authorized dealers for replacement grilles or internal components. |
Frequently Asked Questions - PM40 Earthworks
What is the polar pattern of the Earthworks PM40?
The PM40 has an omnidirectional polar pattern, capturing sound equally from all directions.
What power does the PM40 require?
It requires 48V phantom power (standard XLR supply). Make sure your mixer or interface provides this.
How do I clean the PM40?
Use a dry, soft cloth to wipe the body. For the grille, gently brush with a soft bristle brush. Avoid liquids or compressed air.
What is the frequency response of this microphone?
The frequency response is 40 Hz – 40 kHz, making it suitable for high-definition audio capture.
Can I use the PM40 for outdoor recording?
It is designed for indoor use. For outdoor use, protect it from moisture and wind with a windscreen.
What is the maximum SPL the PM40 can handle?
It can handle up to 140 dB SPL with less than 1% THD, suitable for loud sources.
How should I position the PM40 on a surface?
Place it on a hard, flat surface (e.g., floor, wall, or ceiling) with the grille facing the sound source. Ensure it is stable.
Is the PM40 compatible with all XLR cables?
Yes, it uses a standard 3-pin XLR male connector. Use a high-quality balanced cable for best performance.
What is the self-noise level of the PM40?
The self-noise is 20 dB SPL (A-weighted), which is very low and ideal for critical recording.
Where can I buy spare parts for the PM40?
Contact Earthworks directly or visit their website for authorized service centers and spare parts like grilles or internal circuitry.
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