Audio
Radial ProD2
Connect a keyboard or playback source while keeping left and right independent.
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Model and application
- Channels
- 2
- Design
- Passive
- Inputs / THRU
- Quarter-inch
- Outputs
- XLR mic level
- Input pad
- −15 dB
ProD2 contains independent passive DI paths. It needs no phantom power and does not amplify a weak source. It is not an automatic stereo-to-mono merger.
Connections and required equipment
Source L/R → separate INPUTs → XLR outputs → microphone inputs. THRU carries the parallel source signal for a suitable local destination.
Prepare the system
- Lower levels and protect the system before connecting.
- Label left/right and check source adapter wiring.
- Test each path alone, then the intended stereo mix.
Questions and troubleshooting
Playback loses one side or sounds incomplete.
Check the source breakout before blaming the DI.
- Verify separate left/right feeds to the two INPUTs; check source and console panning. A stereo headphone plug is not automatically a balanced mono feed.
- Test one known source/cable per path at protected level. If the fault follows a cable or output, document it; do not tie source outputs together to force mono.
The signal is quiet or distorted.
Locate the level mismatch.
- XLR outputs are mic level; check the destination preamp and source playback level. THRU is a different output type.
- For distortion, check console clipping first; then compare the DI pad with controlled gain readjustment. Verify clean peaks. Persistent distortion needs source/cable comparison and service evidence.
Hum remains after using ground lift.
The DI switch only changes the audio ground path.
- Compare its built-in GROUND LIFT at protected level and record the result. List attached audio, video and control equipment.
- If hum persists, have the system technician inspect the signal paths and approved isolation options. Never remove protective earth, cut shields or modify mains wiring.
Choose the next check
| Observation | Next check | What to record |
|---|---|---|
| Missing side | Breakout/L-R patch | Source and cable |
| Low/distorted | Mic input/pad/peaks | Settings and meters |
| Hum | Signal ground paths | Connections and comparison |
Precautions
- Do not connect speaker-power outputs without an explicitly approved interface.
- Keep protective earth intact.
- A ground lift is a diagnostic option, not a promise to eliminate every noise.
Official documentation
Manufacturer documentation and reported cases reviewed October 22, 2026. Diagnostic sequences are proposed checks, not physical tests by GLMedia. Match the installed version.
- Radial — ProD2 — Manufacturer source;consult the exact model/version.
- Radial — ProDI/ProD2 User Guide 02-2026 — Manufacturer source;consult the exact model/version.
- Radial — supplied 02-2025 guide — Manufacturer source;consult the exact model/version.