The AmpBulb is an essential backup fuse for PA technicians, sound engineers, and venue operators who can't afford amplifier downtime during live events. This fast-acting glass fuse keeps powered speakers, amplifiers, and powered subwoofers running when electrical surges or overloads would otherwise shut down your system.

Rated at 10 amps and 250 volts, this fast-blow fuse provides reliable circuit protection without the delay that could damage sensitive amplifier components. The glass construction allows for quick visual inspection to confirm if a fuse has blown, while the compact 3/16" x 3/4" size fits standard amplifier fuse holders found in most pro audio equipment.

These dimensions make the AmpBulb compatible with Seismic Audio amplifiers and powered subwoofers, as well as many other professional audio brands using the same standard fuse size. The fast-acting design means it will trip quickly when current exceeds safe levels, protecting expensive amplifier circuits from damage that could cost hundreds in repairs.

Smart PA technicians keep several AmpBulbs in their road case for clubs, churches, outdoor events, and mobile DJ gigs where a blown fuse could end the show. Whether you're running sound for a 100-person wedding reception or a 500-capacity venue, having backup fuses prevents costly downtime and maintains your professional reputation.

Each order includes one replacement fuse ready to install in any compatible amplifier or powered speaker. Seismic Audio backs this essential accessory with reliable shipping and the quality standards that keep your sound system running.

Technical Specifications

Frequently Asked Questions

Will this fuse work in my powered speaker or amplifier?

The AmpBulb fits any amplifier or powered speaker using a standard 3/16" x 3/4" glass fuse holder rated for 10 amps at 250 volts. Check your equipment's manual or existing fuse to confirm the size and rating before ordering. This fuse is compatible with Seismic Audio amplifiers and powered subwoofers, plus many other professional audio brands using the same specifications.

How do I know if my amplifier fuse has blown?

A blown glass fuse will show visible breaks in the internal wire filament, or the glass may appear cloudy or blackened from electrical arcing. If your amplifier suddenly loses power but the AC power cord and outlet are working, check the fuse first. Always turn off and unplug equipment before replacing fuses to avoid electrical shock.

Should I keep backup fuses for live performances?

Yes, carrying 2-3 backup fuses prevents show-stopping equipment failures during live events. Fuses can blow from power surges, overloading, or normal wear, especially in venues with inconsistent electrical systems. Professional sound technicians always pack spare fuses alongside backup cables and adapters in their road cases.

What's the difference between fast-blow and slow-blow fuses?

Fast-blow fuses like the AmpBulb trip immediately when current exceeds the rated capacity, providing maximum protection for sensitive amplifier circuits. Slow-blow fuses tolerate brief current spikes but aren't suitable for most pro audio applications where quick protection prevents expensive component damage.

How many people can an amplifier with this fuse rating handle?

The fuse rating doesn't directly determine crowd capacity – that depends on your amplifier's wattage and speaker configuration. However, amplifiers using 10-amp fuses typically power PA systems suitable for 100-500 person venues like clubs, churches, school auditoriums, and outdoor events when paired with appropriate speakers.

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