JDV-Pre - Audio Equipment Radial Engineering - Free user manual and instructions
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| Product Type | Tube Preamp / Direct Box |
| Brand | Radial Engineering |
| Model | JDV-Pre |
| Inputs | 1 x 1/4" HI-Z instrument input |
| Outputs | 1 x XLR mic output, 1 x 1/4" parallel thru |
| Vacuum Tube | 12AX7 dual triode |
| Power | External 12V DC adapter (included) |
| Frequency Response | 20 Hz - 20 kHz |
| Gain Control | 100 mV to 1 V input sensitivity |
| Signal-to-Noise Ratio | >90 dB |
| Dimensions | 145 x 112 x 48 mm |
| Weight | 850 g |
| Construction | Steel chassis with rubber base |
| Instrument Load | 1 MΩ for true hi-Z loading |
| Ground Lift | Lifts pin-1 to eliminate hum |
| Applications | Recording, live touring, studio DI |
| Maintenance | Wipe with a soft dry cloth |
| Safety | Keep away from water and humidity |
| Repairability | No user-serviceable parts; authorized service only |
| Warranty | 3-year limited warranty |
Frequently Asked Questions - JDV-Pre Radial Engineering
What type of device is the Radial Engineering JDV-Pre?
The JDV-Pre is a tube preamp and direct box designed for instruments and audio sources.
How do I power the JDV-Pre?
It operates from an external 12V DC power adapter included with the unit. No battery is required.
Can I connect my guitar directly to the JDV-Pre?
Yes, the 1/4" input offers a 1 MΩ impedance to preserve your guitar's tone.
Is this preamp suitable for studio recording?
Absolutely, the XLR output provides a clean signal to mixers and audio interfaces, with the tube stage adding warmth.
Does the JDV-Pre require phantom power?
No, it uses its own power adapter, so phantom power is not needed and will not damage the circuit.
What does the ground lift switch do?
The ground lift disconnects pin-1 on the XLR output, eliminating ground loops and hum in live or studio setups.
How should I clean and maintain the JDV-Pre?
Use a soft dry cloth to wipe the chassis. Never use solvents or water.
What kind of tube is inside the JDV-Pre?
It uses a 12AX7 dual triode tube, which is a common and highly musical preamp tube.
How do I replace the tube?
The tube is not user-replaceable; refer to authorized service personnel to maintain safe operation.
What is the physical size of the JDV-Pre?
It measures 145 x 112 x 48 mm and weighs 850 g, making it pedalboard-friendly.
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USER MANUAL JDV-Pre Radial Engineering
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Product information
Brand : Radial Engineering
Model : JDV-Pre
Category : Audio Equipment