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The Daily Insight

Why do my subs keep blowing fuses?

Author

David Ramirez

Published Mar 15, 2026

Why do my subs keep blowing fuses?

In most cases, an amplifier will blow fuses due to internal damage caused by the way it was installed. If the amp fuse keeps blowing, the power wire–the wire that goes to the battery or a hot connection–may be grounding out. …

How do you troubleshoot a Klipsch subwoofer?

Make sure the sub is plugged in, powered on and has a sub cable plugged into the LFE port on the back of the subwoofer. On the back of the sub, turn the gain knob up to at least 50-60% (about 12 or 1 o’clock on the dial) Do not plug the other end of that sub cable into your receiver or sub output.

Why does my 40 amp fuse keep blowing?

If your amplifier’s main power wire has a fuse in-line that keeps “blowing”, it can be related to the wire itself or the amplifier. In most cases, an amplifier will blow fuses due to internal damage caused by the way it was installed.

What kind of Fuse does a Klipsch subwoofer use?

Whether the factory fuse has any specific specifications I don’t know. Most likely it’s a standard fast blowing glass fuse. There are glass fuses that are called slow blow, time delay fuses such as the Bussman GDC Series, Time-Delay, Glass Tube – GDC-2A.

Where can I find a sub 10 fuse?

The SUB-10 fuse near the power cord, after taking some measurements of the fuse holder appears to use a 5 mm x 20 mm 2.0 amp fuse, which I believe is a fast blowing type. You should be able to find this type of fuse at a Radio Shack, online or possibly at a hardware store.

What should I do if my subwoofer fuse blows?

Fuses don’t just blow, especially in the SUB-10. You might as well start looking for a place to repair it. Most likely a fast blow. Hardware stores usually stock fuses. The manual should tell you the type and size. Fuses don’t just blow, especially in the SUB-10. You might as well start looking for a place to repair it.

What kind of Fuse is a slow blow?

Most likely it’s a standard fast blowing glass fuse. There are glass fuses that are called slow blow, time delay fuses such as the Bussman GDC Series, Time-Delay, Glass Tube – GDC-2A. Won’t blow for up to 2 mins with an overload.