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.