La notice dit qu’il faut brancher l’enceinte à une multiprise avant d’utiliser la télécommande.

In French, une notice often means an instruction leaflet, instruction sheet, or manual, especially for a product or device.

So in this sentence, La notice dit... means The instructions say... or The manual says..., not The notice says... in the English public-sign sense.

Qu’il is a shortened form of que il.

In French, que becomes qu’ before a word starting with a vowel sound, to make pronunciation smoother. So:

• que il → qu’il

Here, que means that:

• La notice dit qu’il faut...
  = The manual says that it is necessary to...

This kind of shortening is called elision.

Il faut is a very common French expression meaning:

• it is necessary
• one must
• you have to
• must

It uses il, but this il does not refer to a specific person. It is an impersonal expression.

So:

• il faut brancher... = you have to plug in...
• literally: it is necessary to plug in...

French uses il faut very often where English might simply use must, need to, or have to.

Both are possible, but they feel slightly different.

• il faut = a general instruction or requirement
• vous devez = you must, directly addressing the reader

Because this sentence comes from a manual, il faut sounds natural and neutral. It presents the action as a general requirement rather than speaking directly to you.

Compare:

• Il faut brancher l’enceinte... = The speaker must be plugged in... / You need to plug in the speaker...
• Vous devez brancher l’enceinte... = You must plug in the speaker...

Manuals often prefer impersonal wording.

With brancher, French often uses à to show what something is being connected to.

So:

• brancher l’enceinte à une multiprise
  = plug the speaker into a power strip

The pattern is:

• brancher quelque chose à quelque chose

Examples:

• brancher l’ordinateur à la prise = plug the computer into the socket
• brancher la lampe à une rallonge = plug the lamp into an extension cord

In English, we often say into, but French commonly uses à after brancher.

Here, l’enceinte means the speaker or the loudspeaker.

This word can be confusing because enceinte can also mean pregnant when talking about a person:

• Elle est enceinte = She is pregnant

But in a technology or electronics context, une enceinte usually means a speaker.

So context matters a lot.

Une multiprise is a power strip, multi-socket extension, or multi-outlet adapter.

It is the device that lets you plug several electrical items into one wall socket.

So:

• à une multiprise = into a power strip

After avant, French normally uses de before an infinitive verb.

So:

• avant d’utiliser = before using
• literally: before to use (but that literal wording is not natural English)

Because utiliser begins with a vowel, de becomes d’:

• de utiliser → d’utiliser

This is another example of elision.

French often uses an infinitive like this when the subject is understood from the context.

So:

• avant d’utiliser la télécommande

means:

• before using the remote control
• before you use the remote control

The person doing the using is the same implied person reading or following the instructions. French does not need to repeat vous here.

French uses articles more often than English does.

In English, instruction-style sentences sometimes omit articles or use possessives:

• Plug speaker into power strip before using remote

French usually sounds more natural with articles:

• brancher l’enceinte
• utiliser la télécommande

So even where English might sound more compact, French often keeps the:

• the speaker
• the remote control
• the instructions/manual

The sentence breaks down like this:

• La notice dit = The manual says
• qu’il faut = that it is necessary / that you must
• brancher l’enceinte à une multiprise = plug the speaker into a power strip
• avant d’utiliser la télécommande = before using the remote control

So the overall structure is:

[The manual says] + [that it is necessary] + [to do X] + [before doing Y].

This is a very common French pattern in formal instructions.

Yes. Brancher can have several meanings depending on context, such as:

• to plug in
• to connect
• sometimes informally, to get someone interested in something

But in an electronics sentence like this one, brancher clearly means to plug in / connect to power.

That is why brancher l’enceinte à une multiprise is understood as a physical electrical connection.

Yes, la télécommande is the normal French word for remote control.

You may also hear people shorten it in casual speech:

• la télécommande
• sometimes just la télécommande de la télé, depending on context

But in manuals and standard French, la télécommande is the normal full word.