Handheld Cardioid Dynamic Microphone. Made by Astatic. (MP.CTM-33)
The wide and flat frequency response of the CTM 33 provides unsurpassed natural transparent sound quality. The cardioid pickup pattern minimizes annoying feedback (when used close to sound reinforcement speakers and monitors) and reduces the pickup of unwanted off-axis sounds. An effective internal multistage pop filter minimizes wind and breath noise. The CTM 33 has a Flex-Form hardened steel grille screen that dramatically resists deformation while greatly reducing any risk of adverse performance caused by a bent or dented ball screen. This unique ability to retain its original shape assures that the CTM 33 will maintain its attractive appearance. The CTM 33 uses a high energy neodymium magnet. The low-frequency response of the CTM 33 may be enhanced by increasing or decreasing the distance from the sound source. This phenomenon is technically known as "proximity effect". Nominal or "flat" response is generated at a distance of 24 inches or more. However, as the distance to the sound source decreases, the bass sensitivity increases, providing a solid, robust character. The CTM 33 is supplied complete with a zippered vinyl protective pouch and a snap-in microphone swivel-mount. Features - Natural frequency response for versatile applications vocal performance and speech
- Cardioid-directional for rejection of feedback or unwanted ambient sounds
- Multi stage hardened steel grill and pop filter
- Non reflective, durable soft touch finish
- Includes stand adapter and zipper pouch
Specifications: - Operating Principle: Neodymium Moving Coil Dynamic
- Directional Pattern: Cardioid
- Frequency Response: 80Hz - 12KHz
- Sensitivity: -53 dBV (2.3 mV) @ 1 Pa
- Impedance: 500 ohms
Polar Response and Frequency  
2-D Drawing 
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