Acoustic harmonium is cool, but what if you want to add some delay?! Or maybe warm it up with some nice reverb? Compression?
It's all possible.
The "Mini Mike Preamp" is designed to be used with the Open To Source Sensors Harmonium Microphone Array / Pickup. This accessory converts the XLR output on the microphone to a powered 1/4 inch output - giving you the opportunity to utilize effects pedals and even plug directly into an amplifier.
Get this and get creative!!