3 sentences

1. 这副耳塞的音质非常出色。

   zhè fù ěr​sāi de yīn​zhì fēi​cháng chū​sè.

   The sound quality of this pair of earbuds is excellent.

   Source: Dong Chinese Dictionary

2. 这套视听器材的音质非常好。

   zhè tào shì​tīng qì​cái de yīn​zhì fēi​cháng hǎo.

   The sound quality of this audio-visual equipment is excellent.

   Source: Dong Chinese Dictionary

3. 他的嗓音音质淳厚，非常有磁性。

   tā de sǎng​yīn yīn​zhì chún​hòu, fēi​cháng yǒu cí​xìng.

   His voice has a rich quality and is very magnetic.

   Source: Dong Chinese Dictionary