Shure A85F Line Matching Transformer

Optimize microphone audio for pro audio, security, and surveillance systems with the Shure A85F line matching transformer. Designed to boost and match levels, this impedance matching transformer delivers a 24 dB signal increase to revive weak mic outputs and maintain clear, intelligible audio for monitoring, recording, or live sound. The A85F features a balanced female XLR input and an unbalanced high‑impedance male 1/4" phone plug output, making it ideal for connecting low‑impedance microphones to older mixers, recorders, or CCTV audio inputs — and it may be used in reverse when needed. By preserving signal integrity over long cable runs and minimizing noise and hum, the A85F simplifies integration of microphones into surveillance, security, and broadcast workflows. Its compact, rugged construction fits easily into racks, field kits, or fixed installations where reliability matters. For AV integrators and security professionals needing dependable audio interfacing, the Shure A85F is a straightforward, cost‑effective solution — add it to your next monitoring or surveillance installation to ensure clean, consistent microphone performance.

• Provides a clean 24 dB signal boost to restore weak microphone levels for clearer recordings and monitoring
• Adapts balanced low‑impedance XLR mic outputs to unbalanced high‑impedance 1/4" inputs, enabling compatibility with legacy gear and recorders
• Compact, rugged design for reliable use in studio, field, and security/surveillance installations
• Can be used in reverse to match high‑impedance sources to low‑impedance inputs, adding installation flexibility
• Improves signal integrity over long runs, reducing noise and hum for dependable monitoring and surveillance audio