مكبر الصوت قريب من المسرح.

It literally means amplifier of the sound, which is the normal Arabic way to say loudspeaker.

This is an iḍāfa construction, often called a noun-noun phrase:

• مكبر = amplifier
• الصوت = the sound

Together, they function as one unit: the loudspeaker.

A very important point: in an iḍāfa, the first noun usually does not take ال. So even though the whole phrase is definite, you get:

• مكبر الصوت = the loudspeaker

not المكبر الصوت.

Because Arabic usually leaves out the present-tense to be in sentences like this.

So:

• مكبر الصوت قريب من المسرح literally looks like:
• The loudspeaker near the stage

but it means:

• The loudspeaker is near the stage

This is completely normal in both Standard Arabic and spoken Levantine.

If you wanted was, then Arabic would use a verb, such as كان.

Because the sentence is built as a nominal sentence:

• مكبر الصوت = the subject
• قريب من المسرح = the predicate / comment about the subject

So the structure is basically:

• [The loudspeaker] [is near the stage]

This is the normal Arabic order for this kind of sentence.

Here قريب is acting as the predicate of the sentence, not as an adjective directly inside the noun phrase.

Compare:

• مكبر الصوت قريب = The loudspeaker is near
• المكبر القريب = the near/nearby loudspeaker

In the sentence you gave, قريب is not part of مكبر الصوت. It is saying something about it, so it does not take ال.

That is why:

• مكبر الصوت قريب من المسرح = correct

not:

• مكبر الصوت القريب من المسرح unless you mean the loudspeaker that is near the stage as a noun phrase.

Because قريب commonly goes with من in Arabic.

So:

• قريب من = near / close to

Even though من often means from, you should learn this as a fixed pattern:

• قريب من البيت = near the house
• قريب من المدرسة = near the school

So in this sentence:

• قريب من المسرح = near the stage

It is best not to translate the preposition word-for-word. Just memorize قريب من as a chunk.

قريب agrees with the thing being described, and مكبر is grammatically masculine singular.

So:

• مكبر الصوت قريب = the loudspeaker is near

If the subject were feminine, you would use:

• قريبة

For example:

• السماعة قريبة من المسرح = the speaker/device is near the stage

So yes, agreement matters here.

Because ص is a sun letter. When ال comes before a sun letter, the l sound of ال is absorbed into the next consonant.

So although it is written:

• الصوت

it is pronounced more like:

• aṣ-ṣawt in careful Standard Arabic
• or eṣ-ṣōt / iṣ-ṣōt in Levantine-style pronunciation

So you do not usually say al-sawt.

This is a very common Arabic spelling/pronunciation pattern.

A careful reading close to Standard Arabic would be something like:

• mukabbir aṣ-ṣawt qarīb min al-masraḥ

In Levantine speech, you may hear something more like:

• mkabbir eṣ-ṣōt ʔarīb min il-masraḥ

A few useful notes:

• مكبر may sound like mkabbir
• الصوت becomes eṣ-ṣōt
• قريب is often pronounced ʔarīb in many urban Levantine accents, because ق often becomes a glottal stop
• الـ often sounds like il- or el- in Levantine speech

There is some regional variation, so not every Levantine speaker will say it exactly the same way.

It is very understandable and natural-looking, but it is also quite close to Standard Arabic in wording.

A Levantine speaker would understand it easily, and could say it. But in very everyday speech, people might also choose other expressions, such as:

• حدّ المسرح = next to / by the stage
• جنب المسرح = beside the stage

So a more conversational Levantine version might be something like:

• مكبر الصوت قريب من المسرح
• مكبر الصوت جنب المسرح
• مكبر الصوت حدّ المسرح

All are understandable; the original sentence is perfectly good.

It can mean stage or theater, depending on context.

So:

• in a performance-space context, it may mean the stage
• in another context, it could mean the theater

In your sentence, if the meaning shown to the learner is stage, that is completely reasonable:

• The loudspeaker is near the stage

But be aware that مسرح is a flexible word and can refer to either idea.

Because normal Arabic writing usually leaves out short vowels and most grammatical endings.

So learners usually see:

• مكبر الصوت قريب من المسرح

rather than a fully vowelled version.

A fully marked Standard Arabic version would look something like:

• مُكَبِّرُ الصَّوْتِ قَرِيبٌ مِنَ الْمَسْرَحِ

But in everyday reading and writing, Arabic speakers normally do not write all those vowel marks.

So this sentence looks short and simple on the page, even though there is more pronunciation information underneath it.