AudioControl CM 20 - Everyday Measurement Microphone Passive Sub-Box the Mille PRO subwoofers are

the Mille PRO subwoofers are built with Boundary Free Surround technology allowing for a greater emission surface with equal diameter

Magnet - High density flux ferrite

which could void the car warranty

9 bit /AP4 D (2 CH bridged) amplifiers

3 car audio coaxials were designed with maniacal care to provide a linear frequency response and ensure high reliability

AudioControl CM 20 - Everyday Measurement Microphone Passive Sub-Box the Mille PRO subwoofers areThe AudioControl CM 20 is an excellent everyday, budget measurement microphone with commendable frequency response for its price. The CM 20 is a back electret condenser microphone with omni direction pickup, phantom powered and XLR connector. Rugged construction is part of its appeal. Technical Specifications Performance Frequency Response: 20Hz 20kHz 3dB Polar Pattern: Omnidirectional Impedance: 250 Phantom Power: 10 52Vdc Connector: 3 pin XLR, pin 2