MR5 - Uncategorized Radial Engineering - Free user manual and instructions
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| Product Type | Audio Direct Box / Signal Converter |
| Dimensions (W x D x H) | 8.5 x 6.25 x 2.0 inches (216 x 159 x 51 mm) |
| Weight | 3.2 lbs (1.45 kg) |
| Power Source | Passive (no external power required) or 48V phantom powered |
| Input Connections | 1/4" TS unbalanced, XLR balanced |
| Output Connections | XLR balanced, 1/4" TRS balanced |
| Frequency Response | 20 Hz – 20 kHz ±0.5 dB |
| Maximum Input Level | +24 dBu (1% THD) |
| Dynamic Range | >110 dB |
| Total Harmonic Distortion | <0.01% (typical) |
| Transformer Type | Radial custom wound toroidal |
| Ground Lift Switch | Yes |
| Pad Switch | -15 dB |
| Filter Switch | High-pass filter 80 Hz |
| Construction | 14-gauge steel chassis, powder coated |
| Operating Temperature | -10°C to 60°C (14°F to 140°F) |
| Maintenance | Wipe with dry cloth; no user-serviceable parts |
| Safety Certifications | CE, CSA, RoHS |
| Warranty | 3 years limited |
Frequently Asked Questions - MR5 Radial Engineering
How do I power the MR5?
The MR5 is a passive device that can be powered by 48V phantom power from a mixing console or external supply. No battery or external power adapter is required.
What is the difference between the MR5 and a standard DI box?
The MR5 features a fully balanced transformer-coupled output with a ground lift and pad switch, making it ideal for long cable runs and noisy environments. It also includes a high-pass filter to eliminate low-frequency rumble.
Can I use the MR5 with an electric guitar?
Yes, the MR5 works with any unbalanced high-impedance source like electric guitars, basses, keyboards, and line-level devices. Use the 1/4" input and select the appropriate pad setting if the signal is too hot.
How do I set the ground lift switch?
Use the ground lift switch to eliminate hum caused by ground loops. Start with the switch in the normal position (lift off). If you hear a low-frequency hum, engage the lift to disconnect the ground path.
Does the MR5 have a built-in high-pass filter?
Yes, the MR5 includes a selectable 80 Hz high-pass filter to remove subsonic frequencies, reducing stage rumble and wind noise without affecting the audible signal.
What is the maximum input level before distortion?
The MR5 can handle up to +24 dBu with less than 1% THD, making it suitable for both instrument and line-level signals with plenty of headroom.
Can I use the MR5 with a microphone?
No, the MR5 is designed for high-impedance, unbalanced sources like instruments and line outputs. For microphones, you need a microphone preamp or a dedicated microphone DI.
Is the MR5 rackmountable?
The MR5 is a compact standalone unit with no rack ears included. However, it can be placed on a desk or pedalboard. Radial offers optional rackmount kits if needed.
How do I clean the MR5?
Disconnect all cables and wipe the chassis with a dry, lint-free cloth. Do not use any liquids or chemicals. The interior has no user-serviceable parts.
Does the MR5 work with stereo signals?
The MR5 is a mono device. For stereo signals, you will need two units. However, you can use the 1/4" TRS input as a balanced line input for mono applications.
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USER MANUAL MR5 Radial Engineering
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Product information
Brand : Radial Engineering
Model : MR5
Category : Uncategorized