Brand: Dual
Category: Car Audio
Document Type:
Language: EN
Manual for TBX10A - Troubleshooting and error codes + PDF Download
Uploaded: April 8, 2025, 1:50 p.m.
Manual Publish Date: 2016-01-01
Warranty Summary
Dual Electronics Corp. warrants the TBX10A for one year against defects in material and workmanship from the original purchase date.
Basic Operation Summary:
- Preparation: Disconnect negative battery terminal before installation. Choose a suitable mounting location, ensuring adequate space and avoiding areas with moisture or restricted airflow. Test amplifier functions before final mounting.
- Connections: Connect power (+12V fused near battery), ground (GND to clean metal), remote turn-on (REM to head unit), and input signal (RCA or speaker wire).
- Control Setup: Adjust crossover frequency (50Hz-250Hz) to blend with the sound system. Use phase control to optimize bass. Set input level to match head unit output and avoid distortion. Green LED indicates normal operation.
Troubleshooting and error codes
| Problem | Cause | Action |
|---|---|---|
| Unit will not turn on (no power LED indicator) | BAT+ wire not connected or incorrect voltage REM wire not connected or incorrect voltage GND wire not connected Fuse(s) blown |
Check connections for proper voltage (11~16VDC) Check connection to ground Replace fuse(s) |
| Unit has power - LED is green (but no sound) | Volume turned all the way down Speaker defective or damaged Input signal not connected |
Increase volume level at head unit Check/replace speaker Check high or low level inputs for proper connection |
| Unit blows fuse(s) | Incorrect fuse rating BAT+ wire touching chassis ground |
Use fuse(s) with correct rating Check for pinched wire |
| Engine noise | Speaker defective or damaged Bad ground connection Signal ground loop or RFI (radio frequency interference) |
Check/replace speaker Make sure amplifier is grounded to clean bare metal Re-route RCA cables from existing high current wiring |
| Distorted audio output | Incorrect input signal type or input level too high | Check connections and reduce/adjust input level |
| Low audio output | Incorrect input signal type or input level too low | Check connections and increase or adjust input level |
| Weak bass | Low frequency output is out of phase | Adjust phase control as needed |