The Audio-Technica AT4040 is a versatile, large-diaphragm cardioid condenser microphone known for its transparent, natural sound, low noise, wide dynamic range, and excellent transient response, making it ideal for both studio and live applications, including vocals and instruments. Key features include transformerless, low-noise circuitry, a switchable 80 Hz high-pass filter, a 10 dB pad, and it requires 48V phantom power for operation. 

• Microphone Type: Externally polarized (DC bias) true condenser 
• Polar Pattern: Cardioid 
• Diaphragm: Advanced, large-diaphragm tensioned for smooth, natural sonic characteristics 
• Circuitry: Symmetrical, transformerless design for exceptional transient response and clean output 
• Sound: Offers exceptionally low self-noise, wide dynamic range, and high SPL capability 
• Features: Switchable 80 Hz high-pass (low-cut) filter and a 10 dB pad for signal level adjustment 
• Power: Requires 48V phantom power from an audio interface or mixer 
• Studio Vocals: Provides a full, vibrant sound in the lows and mids, and a bright, lively quality in the higher frequencies. 
• Acoustic Instruments: The air and presence boosts make acoustic guitars and other instruments shine. 
• Electric Guitar: Captures bright but smooth high frequencies and solid lows, with the option to tame boominess with the high-pass filter. 
• Digital Recording: Its transparent reproduction makes it a reliable choice for digital recording systems. 
  

NOTE: There is a slight notch on the Audio Technica logo on the front of the microphone. See pics.