🔊 Enhanced Kemo M040N Preamplifier Module Review

This preamp worked great with my dynamic mic and only required a 9V battery. Directions and wiring were very easy to follow.

So this preamp works, but I couldn't use it because of the common ground wire between the positive voltage and the mic input. The output of this was supposed to go to the input of the signal processor, but I couldn't connect both to the same power supply because the preamp was tuned to the local radio station.

This preamp worked great with my dynamic mic and only required a 9v battery. Directions and wiring were very easy to follow.

So this preamp works, but I couldn't use it because of the common ground between the positive voltage and the microphone input. The output of this was supposed to be the input of the signal processor, but I couldn't connect them both to the same power supply because the preamp was tuned to the local radio station.

This little module does exactly what I need. I set out to build a preamp for using boom box condenser mics for a small footprint portable speaker system. I did it and it worked, but it made too much noise. While researching the noise problem, I came across Kemo modules. When it arrived I ripped the guts out of my homemade amp and hooked it up to a Kemo M040N. MARVELOUS! This worked and no discernible noise was found. Kemo makes other modules that are compatible with the M040N.

Works great, easy to use. I have verified that it draws less than 2mA, allowing a 9 volt alkaline battery to last over 250 hours with this preamp. My application: I drive my newest Audi at track events of the Audi Club. They require all windows to be open for access by security personnel. The exhaust and engine noise of the latest Audi model are so quiet that the engine cannot be heard over the wind noise at high speeds. . So you can't use engine sounds to control revs and shift points on a…