The Omni is an omni-directional, small-diaphragm condenser microphone that can be built at a very low cost. The creator offers detailed instructions and a bill of materials on his website.
- Small-diaphragm capsule from Projects Unlimited
- Omni-directional pickup pattern
- Electret condenser type
Price: $7 for instructions and bill of materials
Adjusted cost: $25 (estimate from HomeMadeMicrophones.com)
More information at www.homemademicrophones.com.