Untested, sold as-is.

The CAD Equitek E200 is a classic multi-pattern, side-address condenser microphone introduced in the 1990s by Conneaut Audio Devices (CAD). Valued for its transparent sound and high-gain active servo headamp circuit, it typically sells used today between $200 and $350 USD. [1, 2, 3, 4, 5]Key Features and Design

• Polar Patterns: Switchable between Cardioid, Omnidirectional, and Figure-8.
• Dual Capsules: Twin back-electret capsules mounted on an internal shock-mounting system.
• Active Servo Circuitry: Uses high-speed OpAmps instead of interstage capacitors to extend low-end response and reduce phase anomalies.
• Power Requirements: Designed to run on standard 48V phantom power combined with internal 9V batteries to supply extra voltage headroom and high SPL handling (up to 148 dB SPL with the pad engaged).
• Onboard Controls: Features a switchable 80 Hz high-pass filter and a -20 dB pad. [1, 2, 3, 4, 5]

Applications and SoundUsers on platforms like HomeRecording.com generally reach a consensus that the E200 provides a warm, spacious, and highly detailed sound. [1]

• Best Uses: Widely praised for acoustic guitars, drum overheads, room miking, and particularly bass or acoustic cabinets due to its flat low-frequency response. [1, 2, 3, 4, 5]