Radial ProDI 1-channel Passive Instrument Direct Box with Custom Transformer
Features
• Full-range, passive direct box
• Isolation transformer eliminates noise
• Very low harmonic and phase distortion
• Compact and rugged design
• Ideal for live sound and studio.
• Isolated XLR connector eliminates chassis ground potential
• Custom audio transformer on input provides 100% isolation to eliminate hum- and noise-causing ground loops, while maintaining signal integrity.
• Military-spec PC board, with full surface ground plane to reduce susceptibility to RF noise
• High-grade switches — long life, high cycle for reliable performance
• 14-gauge steel welded I-beam construction makes it virtually impossible to torque the PC board
• -15dB pad reduces the level going in from loud sources that could overload the circuit and cause distortion
• Book-end design creates a protective zone around the switches & connectors, indestructible 14-gauge steel construction
• Full no-slip rubber bottom pad provides mechanical isolation, electrical insulation and prevents unit from sliding around
• Balanced male XLR output connector, AES standard with pin-1 ground and pin-2 hot
• Lift switch lifts the ground to pin-1 on both channels.
• Heavy-duty baked enamel finish for excellent durability
Passive vs. Active DI
• Active direct boxes employ electronic circuits to change the impedance from hi-Z to lo-Z and balance the signal.
• Passive DIs instead employ a simple passive transformer to do the work.
• Active DIs require batteries, 48V phantom-power or external power supplies to power their circuits, while passive transformer-equipped direct boxes do not require any power to perform their task.
Custom Isolation Transformer
• Equipped with a custom-made audio transformer, which provides exceptional signal handling without saturation.
• Has extremely low phase distortion in the critical bass and mid regions.
• ProDI's transformer provides 100% isolation, to eliminate hum- and noise-causing ground loops, while maintaining signal integrity.
• Also has isolated XLR connectors, to eliminate chassis ground potential, as well as a military-spec PC board, with a full surface ground plane to reduce susceptibility to RF noise.
Really Easy to Use
• Plug and Play
• Connect the instrument to the 1/4" inputs, the 1/4" through jack to the stage amplifier(s) or mixer and the XLR output to the mixing console and you are done.
