Klark Teknik MIC BOOSTER CM-1 Dynamic Microphone Booster with +25 dB Gain, XLR In/Out, Phantom Powered

Add up to +25 dB of ultra-clean gain to any dynamic or passive ribbon microphone with the Klark Teknik MIC BOOSTER CM-1. This inline preamp delivers pristine signal amplification without adding noise or colour, making it an essential tool for podcasters, broadcasters, and live sound engineers who need to boost low-output microphones before they hit the main preamp.

Overview

The CM-1 is a compact, rugged inline microphone booster that connects directly between your microphone and mixer or audio interface. It draws power from standard +48V phantom power, so no external power supply is needed. The discrete Class-A JFET input stage ensures ultra-low noise and transparent gain, preserving the natural character of your microphone while lifting the signal to a healthy level for longer cable runs or quieter preamps.

What stands out

• +25 dB of fixed gain for dynamic and passive ribbon microphones
• Ultra-low noise discrete Class-A JFET input stage
• Powered by standard +48V phantom power – no batteries or external supply
• Rugged metal chassis built for stage and studio use
• Simple inline design with XLR female input and XLR male output
• Wide frequency response from 10 Hz to 20 kHz (±1 dB)

Technical details

• Gain: +25 dB
• Input: 1x XLR female (balanced)
• Output: 1x XLR male (balanced)
• Power requirement: +48V phantom power
• Frequency response: 10 Hz – 20 kHz (±1 dB)
• Input impedance: 15 kΩ
• Output impedance: 135 Ω
• Equivalent Input Noise (EIN): -129 dBV (A-weighted)
• Channels: 1 (mono)
• Housing: Rugged metal chassis
• Application: Boosts low-level microphone signals for longer cable runs or quieter preamps

Our verdict

The Klark Teknik MIC BOOSTER CM-1 is a must-have for anyone using dynamic or ribbon microphones with low-output preamps. Its transparent +25 dB gain and ultra-low noise floor make it an indispensable problem-solver in both live and studio environments.