Radial Engineering ProAV1 Passive Multimedia Direct Box

Radial Engineering ProAV1 Passive Multimedia Direct Box

The Radial Engineering ProAV1 is a rugged, versatile, passive direct injection (DI) box designed specifically for AV professionals, live sound engineers, installation integrators and rental houses. With its “Swiss‑Army‑knife” connectivity, the ProAV1 easily interfaces consumer devices, instruments and pro audio sources to PA systems, mixers, consoles or recording gear — making it an indispensable tool for live events, installations and mobile rigs, Whether you need to connect a laptop, tablet, CD/DVD player, smartphone, active instrument, keyboard or line‑level device into a balanced microphone input, the ProAV1 simplifies the process. Its built‑in stereo‑to‑mono merge, ground‑lift switch, pad and transformer‑isolation provide high performance and reliability. Being completely passive (no power required) and built in a heavy‑duty steel chassis, it’s built for the road.

Key Features

• Multi‑format inputs: Stereo RCA, 3.5 mm TRS (1/8″), ¼″ instrument jack and XLR line input for maximum flexibility.
• Stereo‑to‑mono summing: Automatically merges left + right channels to mono output, reducing channel count and simplifying patching.
• Balanced, transformer‑isolated output: Uses a custom‑wound Radial transformer to deliver a 600 Ω mic‑level, balanced XLR output, providing ultra‑quiet performance and excellent common‑mode rejection to eliminate hum and buzz from ground loops.
• Passive design: Since no power supply is required, the ProAV1 is plug‑and‑play — ideal for rental gear or installations where reliability matters.
• High signal handling & ultra‑linear performance: The transformer can handle very high input levels and delivers a wide frequency response (20 Hz–18.5 kHz) with extremely low distortion (THD 0.01%).
• Rugged construction: 14‑gauge steel “book‑end” chassis protects the jacks and switches; built for touring and installation.
• Useful controls: Includes a ‑15 dB input PAD for hot sources, and a Ground‑Lift switch to disconnect pin‑1 and resolve ground‑loop issues.
• Thru‑puts on many inputs: The ¼″ instrument input, RCA and 3.5 mm inputs provide parallel “thru” outputs so you can patch to another destination while sending to the DI