The new Marantz PHA-3 Stereo Field Production Headphone Amplifier provides three independent headphone feeds from balanced or unbalanced sources and can drive headphones to high levels at audiophile quality with low distortion — ideal for field broadcast production companies, portable audio/video production crews and live sound productions where critical audio monitoring is required, even under high SPL conditions. The PHA3 features a rugged metal case and the ability to daisy-chain additional units utilizing the Loop outputs.

Features include:

• Three independent headphone outputs with individual level controls
• Balanced XLR inputs or 1/4″ and 3.5mm stereo inputs
• Switchable stereo or mono operation
• 1/4″ Loop output for daisy-chaining additional units in series for extra outputs
• Parallel 3.5mm and 1/4″ outputs with two additional 1/4″ outputs
• Internal power (2x AA) or external power (5-17VDC) with seamless switchover
• GREEN LED indicates power with good battery, RED indicates low battery power
• LED turns RED to warn when four hours of battery life remain
• Rugged aluminum chassis with strap loops for wearing or mounting

Here are the details.