Neumann KM 145 Speech Cardioid Miniature Condenser Microphone with AK 45 Capsule

Neumann KM 145 Miniature Cardioid Speech Condenser Microphone

The Neumann KM 145 is a professional miniature condenser microphone from the historic Neumann KM 100 modular microphone system. Combining the KM 100 output stage with the AK 45 cardioid speech capsule, the KM 145 was specifically engineered for close-range speech reproduction, delivering outstanding intelligibility, natural vocal balance, and excellent rejection of unwanted low-frequency noise. Designed for broadcast, voice-over, public speaking, film production, and studio applications, the KM 145 provides the renowned Neumann sound quality in a compact, modular format.

The AK 45 capsule incorporates an acoustic low-frequency roll-off that minimizes wind noise, handling noise, and structure-borne vibrations while naturally compensating for the proximity effect during close speech recording. This specialized design produces clear, balanced voice reproduction without excessive bass buildup, making the KM 145 an ideal choice for professional spoken-word applications.

Optimized for Professional Speech Recording

The KM 145 features a cardioid pressure-gradient transducer specifically optimized for speech capture. Its directional characteristic effectively focuses on the speaker while reducing ambient noise and off-axis interference. The integrated acoustic bass roll-off ensures consistent tonal balance during close-microphone operation, helping voices remain natural, articulate, and highly intelligible.

Whether used in a broadcast studio, conference environment, podcast production, or film set, the KM 145 delivers accurate vocal reproduction with the transparency and reliability expected from Neumann professional microphones.

Historic KM 100 Modular Microphone System

The KM 145 is part of Neumann's historic KM 100 modular microphone series, which introduced interchangeable active capsules and a dedicated output stage to provide maximum recording flexibility. The modular architecture allowed users to select different capsule characteristics while maintaining the same professional output stage, creating customized microphone solutions for virtually every recording application.

The compact microphone design also supports various mounting accessories and extension systems, allowing discreet placement in studios, broadcast facilities, theatres, and production environments.

Key Features

• Professional miniature condenser microphone.
• Historic Neumann KM 100 modular microphone system.
• Combines KM 100 output stage with AK 45 speech capsule.
• Cardioid pressure-gradient transducer.
• Optimized for close-range speech recording.
• Integrated acoustic low-frequency roll-off.
• Natural compensation of proximity effect.
• Excellent speech intelligibility.
• Compact and lightweight professional design.
• Transformerless output circuitry for transparent audio reproduction.

Ideal Applications

• Broadcast studios
• Voice-over recording
• Podcast production
• Film and television dialogue
• Speech reinforcement
• Corporate presentations
• Conference systems
• Studio narration
• Professional content creation
• Location recording

Technical Specifications

• Product Type: Miniature condenser microphone
• Series: Neumann KM 100 Modular Microphone System
• Capsule: AK 45 Active Capsule
• Acoustical Operating Principle: Pressure-gradient transducer
• Polar Pattern: Cardioid
• Frequency Response: 20 Hz – 20 kHz
• Sensitivity: 14 mV/Pa
• Equivalent Noise Level (A-weighted): 16 dB-A
• Maximum SPL: 138 dB
• Maximum SPL with Preattenuation: 148 dB
• Rated Impedance: 50 Ω
• Rated Load Impedance: 1 kΩ
• Power Requirement: 48 V Phantom Power (P48)
• Output Connector: XLR 3-pin
• Diameter: 22 mm
• Length: Approximately 92 mm
• Weight: Approximately 80 g

Why Choose the Neumann KM 145?

The Neumann KM 145 was purpose-built for professional speech recording where vocal clarity and natural tonal balance are essential. Its dedicated AK 45 speech capsule, cardioid pickup pattern, integrated low-frequency roll-off, and modular KM 100 architecture provide exceptional flexibility and reliable performance for broadcast, voice-over, podcasting, conferencing, and studio production. As part of Neumann's historic KM 100 series, the KM 145 continues to be recognized for its outstanding engineering, compact design, and world-class audio quality.