Fuse Confusion

We are often asked which fuses should be used for various amplifier types.

It is important to fit the correct fuse to your amp. Fitting the wrong current rating or type of fuse will put the amp at risk of damage.

There are two important things to note when selecting fuses for your amp. The first thing is the current rating. This will be indicated on the amp rear panel by a number followed by the letters “A” or “mA”. As an example, if your amp uses a two amp fuse, you will see “2A” on the rear panel.

The second thing to note is the speed type for the fuse. If the fuse legend on the rear panel indicates “T” or “Slo Blo” next to the current rating, you must fit a “time delay” or “Slo Blo” fuse. This type of fuse carries a “T” mark next to the current rating number on its end cap. E.g “T2A” or “T250mA”.

If no speed type is shown on the rear panel legend, you should assume that a “standard” fuse must be fitted. This type of fuse carries no speed type mark next to the current rating number on its end cap. There are also Fast Blow fuses which are indicated by an “F” before the current rating.

Always carry spare fuses of the correct type with you at all times. Occasionally fuses fail simply as a result of ageing. If this happens, the amp will work fine once the failed fuse has been replaced. If a replacement fuse blows straight away, or after a short time of amplifier operation, there is a fault. In such circumstances you should get the amp checked and repaired as quickly as possible.

Do not be tempted to fit a fuse of a higher rating than that indicated on the amp’s rear panel. If you do that, the amp will not be adequately protected and there will be a risk of serious damage, or even fire.

We can supply fuses or fuse kits for all amps. Every amp repaired or serviced by Essex Amp Repairs, will be provided with a spare set of fuses free of charge.

This entry was posted in Information. Bookmark the permalink.

Leave a Reply