yīnliàng tài dà, qǐng tiáoxiǎo.

音量 means volume level. In everyday Mandarin, it is most commonly used for the volume of things like:

• a TV
• a phone
• a speaker
• a radio
• a computer

So in this sentence, 音量太大 means the volume is too loud / too high.

You can also hear 声音太大 for the sound is too loud, but 音量 sounds especially natural when talking about something that can be adjusted.

Mandarin often talks about sound volume in terms of big/small rather than high/low.

So:

• 声音大 = loud
• 声音小 = quiet
• 音量大 = volume is high/loud
• 音量小 = volume is low/quiet

This may feel unusual to an English speaker, but it is completely normal in Chinese.
Here, 大 does not mean physically big. It means the volume level is strong or loud.

太 + adjective often means too... in the sense of more than is acceptable.

So:

• 太大 = too loud / too high / excessively large

In this sentence, 音量太大 means the volume is too loud.

This is stronger than simply saying it is loud. It suggests there is a problem and something should be changed.

Good question. Both patterns exist, but they are not exactly the same.

• 太大 = too loud / excessively loud
• 太大了 = very loud / too loud, often with a stronger sense of reaction

In this sentence, 音量太大，请调小。 is concise and practical, like a notice or direct request.

If you said:

• 音量太大了，请调小。

that would also be natural. It sounds a little more spoken and a little more expressive.

调小 means turn down, adjust lower, or reduce.

It is made of:

• 调 = adjust
• 小 = smaller / lower

So literally it means adjust to smaller.

This pattern is common in Chinese:

• 调大 = turn up
• 调高 = adjust higher
• 调低 = adjust lower
• 调小 = turn down / make smaller

So yes, it functions like a verb phrase and is very natural here.

Because 调 has more than one pronunciation.

Here it is tiáo, meaning to adjust / regulate:

• 调小 = adjust lower
• 调大 = adjust higher

The pronunciation diào is used in other meanings, such as certain senses related to tone, melody, or transfer/move around, depending on the word.

So in 请调小, the correct reading is tiáo.

Yes — and that is very natural.

Compare:

• 音量太大，请调小。
• 请把音量调小。

The version with 把 explicitly marks 音量 as the thing being changed. It can feel a little clearer and more complete in speech.

All of these are natural:

• 音量太大，请调小。
• 音量太大了，请把音量调小。
• 请把音量调小一点。

The original sentence is short and efficient, which is common in signs, subtitles, and simple instructions.

Chinese often leaves out the subject when it is obvious from context.

In 请调小, the understood subject is basically you:

• (你)请调小。 = Please turn it down.

Because the sentence is clearly directed at the person controlling the volume, there is no need to say 你.

This omission is very common in Mandarin.

请 means please, and it makes the request polite.

• 调小。 = Turn it down.
• 请调小。 = Please turn it down.

That said, 请 is polite but still fairly direct. It is very common in notices, announcements, and practical requests.

If you want to sound softer in conversation, you might say:

• 请调小一点。 = Please turn it down a bit.
• 麻烦你调小一点。 = Could you trouble yourself to turn it down a little?
• 可以调小一点吗？ = Could you turn it down a little?

They are related, but not identical.

• 调小 is usually used for adjusting the volume of a device
• 小声一点 means be a little quieter or speak more softly

Examples:

• 请把电视音量调小。 = Please turn down the TV volume.
• 请小声一点。 = Please lower your voice a little.

So if the problem is a phone, TV, or speaker, 调小 is especially appropriate.
If the problem is a person talking loudly, 小声一点 is more natural.

Not usually in the most natural way.

音量太大，请调小。 sounds like something said about a controllable volume setting, such as on a device.

For a person’s voice, more natural choices are:

• 你声音太大了。 = Your voice is too loud.
• 请小声一点。 = Please speak more quietly.
• 麻烦小声一点。 = Please keep it down.

So the original sentence is best for machines or audio equipment.

Chinese often connects ideas simply by putting them next to each other, without an explicit connector.

So:

• 音量太大，请调小。

literally has the structure:

• The volume is too loud, please turn it down.

Chinese does not always need words like so, therefore, or because of that when the relationship is already clear from context.

If you wanted, you could make it more explicit, but it is not necessary.

Yes, those are also natural.

Compare:

• 调小 = turn down / make smaller
• 调低 = lower

Both can work for volume. For example:

• 请调小音量。
• 请把音量调低。

They are very similar in meaning.
调小 feels very common in everyday speech for volume.
调低 may sound slightly more formal or technical in some contexts, but both are correct.

A few very natural spoken versions are:

• 音量太大了，请调小一点。
• 请把音量调小一点。
• 声音太大了，麻烦调小一点。

Compared with these, 音量太大，请调小。 sounds a bit more concise and instruction-like, which is perfect for a notice, subtitle, or simple request.