The CBulb replacement fuse keeps pro audio technicians and sound engineers prepared when crossover protection circuits fail during critical events. This 12-volt, 25-watt glass bulb fuse serves as essential backup protection for active crossover networks.

When a crossover fuse blows, it cuts power to frequency-dividing circuits that route signals to woofers and tweeters, effectively silencing your PA system. The CBulb restores crossover functionality by replacing blown protection fuses with proper 25-watt capacity and 12-volt rating.

This glass bulb fuse measures 1 5/8" x 3/8" and directly replaces original fuses in Seismic Audio crossover models SACN-151, SACN-152, and SACN-153. The 25-watt power rating handles typical crossover loads while protecting delicate driver circuits from overcurrent damage.

Sound technicians rely on CBulb fuses for church sound systems, live band PA setups, and DJ installations where crossover failure means dead speakers and angry crowds. Mobile performers especially benefit from carrying spare fuses to venues where equipment failure isn't an option.

Each CBulb fuse installs directly into crossover fuse holders without tools or special cables. The package includes one replacement fuse ready for immediate installation.

Seismic Audio backs the CBulb with standard warranty coverage and ships nationwide. Keep your crossovers protected and your shows running with reliable replacement fuses designed for pro audio applications.

Technical Specifications

Frequently Asked Questions

Which Seismic Audio crossovers use the CBulb fuse?

The CBulb fuse is compatible with Seismic Audio crossover models SACN-151, SACN-152, and SACN-153. These active crossovers use the 12-volt, 25-watt bulb fuse as protection for their internal circuits. Always verify your specific crossover model before ordering replacement fuses.

How do I know if my crossover fuse is blown?

A blown crossover fuse typically results in no output from the affected frequency range or complete signal loss from connected speakers. You may also see a visibly broken filament inside the glass bulb or black discoloration on the fuse ends. Check the fuse with a multimeter or swap in a known good replacement to confirm failure.

Can I use a higher wattage fuse as a replacement?

No, always use the exact 25-watt rating specified for your crossover model. Higher wattage fuses may not provide adequate circuit protection, while lower ratings will blow prematurely under normal operating loads. The 12-volt, 25-watt specification ensures proper protection for crossover components.

How many spare fuses should I keep on hand?

Pro audio technicians typically keep 3-5 spare CBulb fuses in their repair kit for emergency replacements during events. Churches and permanent installations should maintain at least 2-3 spares, while mobile DJs and bands benefit from carrying extras to prevent show-stopping equipment failures at venues.

What tools do I need to replace a crossover fuse?

Most crossover fuse holders require no tools for replacement - simply pull out the blown fuse and press in the new CBulb replacement. Some units may have screw-in fuse holders requiring finger tightening only. Always power down the crossover before replacing any fuses for safety.

WARNING: This product can expose you to chemicals including Di(2-ethylhexyl)phthalate (DEHP), which is known to the State of California to cause cancer. For more information, go to: www.P65Warnings.ca.gov