Audio-Technica AT8539 In-Line Power Module (HRS/cW to XLR)

The AT8539 is an in-line power module with an HRS-type 4-pin input that mates with any Audio-Technica Wireless Essentials microphone (models ending in cW), converting its output to a standard 3-pin XLRM line-level signal for a mixer or recorder input. It also supplies the DC bias voltage those capsules need to operate, running on 11-52V phantom power.

An integral low-cut filter rolls off below 80 Hz at 18 dB per octave when engaged, cutting handling and room rumble before it reaches the mix. The housing is steel for durability and shielding against hum, a practical build for a module that spends its life clipped to a cable run.