I purchased some of these and think they're quite good. Look up the "Singapore Hi-Fi Blog" for a review.
Here's a bit of info in English, although it's in low resolution.
https://upload.review33.com/2ndhand/201811/201811291312535900.jpg
Here's a bit of info in English, although it's in low resolution.
https://upload.review33.com/2ndhand/201811/201811291312535900.jpg