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Everything In Music - Since 1958
Everything In Music - Since 1958

Earthworks M23 23 kHz Omnidirectional Measurement Microphone

Out of Stock
Original price $624.00
Original price $624.00 - Original price $624.00
Original price $624.00
Current price $499.00
$499.00 - $499.00
Current price $499.00
About Inventory Status


Questions?
Call or text us at 301-946-8808.

In stock: It is in stock and available to ship or pickup. Apparel must be shipped from another location and is not available for in-store pickup. We can usually ship or have these items available for pickup by the next business day if they don't require inspection, special handling, or setup. Our pickup location is 11151 Veirs Mill Rd. Silver Spring, MD 20902.

📆 Preorder: It is on the way to our warehouse. We can't predict when preorder items will arrive due to current supply chain issues. If you place an order for one of these items someone will contact you to estimate the delivery date.

Out of stock: We don't currently have it available but you're not out of luck yet. We still may be able to get it. If you order one of these items we will contact you with an estimated fulfillment date. You have the option to cancel the order if you change your mind.

Special order: The item is so special that it needs to be custom ordered for you. Some of these items are works of art and have to be made individually. Orders for special order items must be prepaid and we cannot accept cancellations or refunds.

█ Sold out: We don't think we can get this item because it was either discontinued by the manufacturer or was limited in quantity. If you want or need this item call or text us. Sometimes we can help you track down the item through other sources or help you find something similar.

About Item Conditions


Questions?
Call or text us at 301-946-8808.

New: The item is brand new as received from the manufacturer with a full manufacturer warranty. Instruments such as guitars, snare drums, drum kits, brass and woodwind instruments may be opened for photography and quality control inspection and may not be in a factory sealed box.

Mint or Open Box: The item may have been opened and tested but has been repackaged. The original packaging may have superficial issues but the item itself and any originally included accessories are in perfect, like new condition.

Display Model: These items are so cool that we put them on display in our legendary shop. The condition is brand new as received from the manufacturer with manufacturer warranty. Rest assured, these items undergo a very careful inspection before shipping.

Demo: These items have been on our sales floor for demo purposes and will likely show signs of use. The original packaging may no longer be included, but you can be assured that you are receiving an awesome item and an awesome price.

Used: The item is used. These item may have varying degrees of wear. Please read the description for information about the condition of the item. Used items do not carry a warranty.

B or C Stock: Factory refurbished. These items were purchased from the manufacturer in a refurbished condition. They will show some cosmetic issues, but nothing that would impact performance. Being that these are sealed from the manufacturer, we generally do not open these to photograph the cosmetic issues. They are guaranteed to work and may have a limited warranty or you may purchase an extended warranty in some cases. Please see the listing description for item specific information.


Don't Sacrifice Accuracy For Cost With The Earthworks M23 23 kHz Omnidirectional Measurement Microphone

The M30 is a precision engineered 23kHz omnidirectional measurement microphone ideally suited for acoustical measurements including loudspeaker design and quality control, sound system setup and troubleshooting, room acoustics, or any application where an accurate free-field measurement microphone is required.

Performance

Known for its reliable performance, the M23 delivers unparalleled audio results at an affordable cost. It has a flat frequency response that extends from 9Hz to 23kHz, an exceptionally consistent omnidirectional polar response, 138dB SPL rating without distortion and no handling noise.

Immune to most temperature and atmospheric fluctuations, the M23 delivers reliable and repeatable results in any environment.  

Extremely fast impulse response and linear phase response make the M23 ideal for use with high-quality FFT-based real-time audio system measurement software like SMAART, SIM, REW, Electroacoustics Toolbox, FuzzMeasure and others, as well as for use in PA system alignment and loudspeaker design.

Every M23 is individually hand-tuned and tested and is delivered with its own printed frequency response chart. An Electronic Calibration File (ECF) is generated for each microphone during final testing, and can be downloaded free of charge after product registration.



  • 23kHz flat frequency response
  • Cost effective measurement microphone
  • Improved version of the SMAARTMIC previously offered by EAW
  • Ideally suited for acoustical measurements sound system setup and troubleshooting, room acoustics, or any application where an accurate free-field measurement microphone is required
  • Omnidirectional polar pattern
  • Flat frequency response, fast impulse response and exceptional polar characteristics
  • Used by SMAART, MLSSA, Spectrafoo, TEF and RTA in addition to acoustic measurement systems manufactured by dbx, DEQX and others
  • Meets or exceeds ANSI Type 1 and applicable IEC 61094 requirements
  • Each M Series microphone is delivered with its own calibration chart providing its individually measured open-circuit sensitivity and the frequency response curve
  • Electronic Calibration File available
  • Operating Temp Range: -20 deg C to +60 deg C ( -4 deg. F to 140 deg. F)
  • Storage Temp Range: -40 deg C to +80 deg C ( -40 deg. F to 176 deg. F)
  • Humidity: Up to 90%
  • Re-calibration recommended every five (5) years


  • Frequency Response: 9Hz to 23kHz ±1/-3dB
  • Polar Pattern: Omnidirectional
  • Sensitivity: 34mV/Pa (-29dBV/Pa)
  • Power Requirements: 24 – 48V Phantom, 10mA
  • Max Acoustic Input: 138dB SPL
  • Output: XLR (pin 2+)
  • Output Impedance: 65Ω balanced (between pins 2 & 3)
  • Min Output Load: 600Ω between pins 2 & 3
  • Noise: 20dB SPL equivalent (A weighted)
  • Dimensions L x D: 165mm x 22mm (6.5 x .860 inches)
  • Weight: .35 lb. (160g)

Manufacturer: Earthworks
Model: M23
SKU: I280226-N-0-WHXX
UPC: 827517000558


We are Chuck Levin's Washington Music Center

Maryland, Virginia, and Washington DC's legendary music shop. Family-owned and operated since 1958. Buy gear the way it was meant to be bought, from a store that's been there through it all and has the vibe to prove it. We're staffed with musicians and industry experts, people that live and breathe music gear. Our mission is to help you find the right gear for your project, that thing that will bring you the most joy out of what you do. We're an authorized dealer for almost every brand, we stock items the other stores don't, so you can try before you buy. Stop by our Wheaton, MD showroom and see for yourself.

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