OPERATION
Troubleshooting
Problem | Cause | Action | |
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Unit will not turn on | BAT+ wire not connected or incorrect voltage | Check connections for proper voltage | |
(no power LED indicator) | REM wire not connected or incorrect voltage | (11~16VDC) | |
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| GND wire not connected | Check connection to ground | |
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| Fuse(s) blown | Replace fuse(s) | |
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Unit has power - LED is | Volume turned all the way down | Increase volume level at head unit | |
green (but no sound) |
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Speaker defective or damaged | Check/replace speaker | ||
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| Input signal not connected | Check high or low level inputs for | |
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| proper connection | |
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Unit blows fuse(s) | Incorrect fuse rating | Use fuse(s) with correct rating | |
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| BAT+ wire touching chassis ground | Check for pinched wire | |
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| Speaker defective or damaged | Check/replace speaker | |
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Engine noise | Bad ground connection | Make sure amplifier is grounded to | |
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| clean bare metal | |
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| Signal ground loop or RFI (radio frequency | ||
| interference) | high current wiring | |
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Distorted audio output | Incorrect input signal type or | Check connections and reduce/adjust | |
| input level too high | input level | |
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Low audio output | Incorrect input signal type or | Check connections and increase or | |
| input level too low | adjust input level | |
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Weak bass | Low frequency output is out of phase | Adjust phase control as needed | |
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For Your Records
Registration
Please keep your original sales receipt and be prepared to provide this receipt in the event you require service, as your original receipt is considered the best proof of purchase and indicates the date you purchased your Dual product.
Dealer Name
Dealer Phone
Purchase Date
Register Your Product
Register your product online at www.dualav.com.
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