Pro-ISO - Uncategorized Radial Engineering - Free user manual and instructions
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| Product Type | Professional Audio Isolation Transformer / Direct Box |
| Brand | Radial Engineering |
| Model | Pro-ISO |
| Dimensions | 5.5 x 3.5 x 2.0 inches (approx.) |
| Weight | 1.0 lb (approx.) |
| Power Supply | Passive (no external power required) |
| Input Connector | 1/4" TS phone jack (unbalanced) |
| Output Connector | XLR male (balanced) |
| Ground Lift Switch | Yes, to eliminate ground loops |
| Transformer Isolation | Yes, internal isolation transformer |
| Frequency Response | 20 Hz - 20 kHz (±0.5 dB) |
| Dynamic Range | > 110 dB |
| Total Harmonic Distortion | < 0.01% (typical) |
| Input Impedance | 10 kΩ |
| Output Impedance | 600 Ω (balanced) |
| Chassis Material | Steel with durable finish |
| Mounting | Desktop or pedalboard (rubber feet included) |
| Included Accessories | User manual, warranty card |
| Maintenance | Wipe with dry cloth; no solvents |
| Safety Precautions | Do not expose to moisture; use only with audio equipment |
Frequently Asked Questions - Pro-ISO Radial Engineering
What is the Radial Pro-ISO used for?
The Pro-ISO is a passive direct box that provides galvanic isolation to eliminate hum and buzz caused by ground loops between audio equipment.
Does the Pro-ISO require phantom power?
No, the Pro-ISO is fully passive and does not require any power source, including phantom power.
How do I connect the Pro-ISO?
Connect an unbalanced 1/4" instrument or line output to the input jack, and run a balanced XLR cable from the output to your mixer or interface. Use the ground lift switch if you encounter hum.
What is the ground lift switch for?
The ground lift disconnects the input ground from the output ground, breaking ground loops that cause hum and noise. Try both positions to see which sounds cleaner.
Can I use the Pro-ISO with a keyboard?
Yes, the Pro-ISO is ideal for keyboards, synths, and other line-level sources. It can also handle high-impedance instruments like guitars.
What is the frequency response of the Pro-ISO?
The frequency response is 20 Hz to 20 kHz with minimal deviation, ensuring transparent audio transmission.
Is the Pro-ISO compatible with phantom power?
While the Pro-ISO does not require phantom power, it is phantom power safe—connecting to a mixer with phantom power on will not damage the unit.
How do I clean the Pro-ISO?
Use a soft, dry cloth to wipe the surface. Do not use abrasive cleaners or solvents.
Does the Pro-ISO have a warranty?
Radial Engineering offers a 3-year transferable warranty against defects in materials and workmanship. Keep your receipt.
Can the Pro-ISO be rackmounted?
No, the Pro-ISO is a compact pedal-style unit designed for desktop or pedalboard use. It is not rackmountable.
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