OPABoardsREV_1.pdfProduct Overview
The Single Channel OPA Alice PCB is an ultra-low noise impedance converter designed for DIY microphones. Made for builders and experimenters, it provides an ultra-low noise signal path, impedance conversion, and simple installation.
Ideal for DIY microphone builds, this product helps simplify wiring and installation.
Key Features
- Single-channel OPA-based microphone circuit
- Low-noise impedance conversion
- 12VDC output to bias electret microphones
- Mates with our DC-DC Hex Inverter for a complete solution for condenser microphones
Applications
- DIY microphone builds
- Microphone upgrades and modifications
- Custom audio electronics projects
Technical Description
This compact PCB provides a solution for DIY microphone builds. Built around a low-noise OPA-based impedance converter, the circuit adds only about 1 dB of self-noise beyond the capsule, ensuring the microphone’s noise performance is determined by the capsule itself rather than the electronics.
Designed specifically for builders and experimenters, it helps simplify the cost and complexity of creating high-performance custom microphones.
- Ultra-Low Noise Signal Path
The OPA-based impedance converter adds approximately 1 dB of self-noise, allowing the capsule to define the microphone’s noise floor rather than the electronics. - Integrated Capsule Bias Supply
12VDC output provides stable polarization voltage for electret capsules, eliminating the need for external bias circuitry. The 12VDC output can also drive our DC-DC Hex Inverter for a complete solution for condenser microphones - Designed for Modern DIY Microphone Projects
Compatible with a wide range of microphone capsules and optimized for low distortion, balanced output, and strong RF immunity.
Specifications
| Product Type | Microphone circuit PCB |
| Configuration | Single channel |
| Application | DIY Microphone Builds |
| Compatibility | Condenser and electret microphone capsules |
| Form Factor | PCB, 53mm x 37.75mm (tapers to 34mm) |
| Included | One piece, fully populated single channel board |
Helpful Pairings
This product may be used with our TSC-1, JLI-2555, and JLI-3410 depending on your application.
Frequently Asked Questions
What does this circuit do?
This board provides impedance conversion for condenser or electret microphone designs, simplifying DIY builds.
What type of microphones is this used for?
It is designed for use with condenser microphone capsules or electret microphone capsules in custom or modified microphone builds.
What other components are required?
A microphone capsule, microphone body, and supporting hardware are typically required to complete a build. A bias generator is also needed for a condenser microphone.
