About theEarthworks M23mp MicrophonesTheEarthworksM Series has become the accepted standard for affordable, reliable reference and measurement microphones that are accurate in the time domain and frequency response. They are remarkably stable with respect to temperature and atmospheric conditions and are optimized for clean, very fast impulse performance providing accurate wideband response with virtually no handling noise.Earthworks M23mp Microphone Specs:Frequency Response: 9Hz to 23kHz 1/-3dB Polar Patern: OmnidirectionalSensitivity: 30mV/Pa (-30.5dBV/Pa)Max Acoustic Input: 142dB SPLNoise: 22dB SPL equivalent (A weighted)Cost effective measurement microphoneImproved version of the SMAARTMICManufacturer:EarthworksModel:M23MPSKU:I291467-N-0-WHXXUPC: 827517000565We are Chuck Levin’s Washington Music CenterSince 1958, Chuck Levins Washington Music Center has been the trusted destination for musicians and audio professionals across Maryland, Virginia, and Washington, D.C. Family-owned and operated, our legendary music store delivers Everything in Musicfrom instruments and recording gear to pro audio, rentals, and repair services.Our team of musicians and industry experts lives and breathes gear, helping you build the perfect setup for your next performance, studio session, or installation. As an authorized dealer for top brands, we also offer our award-winning CHUCKSCLUSIVE lineexclusive, limited-edition instruments and collaborations recognized with the NAMM Top 100 Dealer Innovation Award for redefining what a music retail experience can be.Chuck Levins isnt just a storeits a community built by players, engineers, and creators who share a lifelong passion for sound. Stop by our legendary Wheaton, MD showroom or contact us anytime for expert advice, product questions, or the best possible deal on your next piece of gear.