toddy0191
500+ Head-Fier
All those similar models should be the same as they're from a same company that OEM/ODM for ppl. The company is Senzhen Estron Technology co. If you look at Alibaba they have many products offering and they largely focus on hybrid earphones.
https://szestron.m.en.alibaba.com/?spm=a2706.7835515.1998800312.15.iEJYex
The silver colour which they named it Estron C630 is actually pretty decent in terms of SQ, just a crappy microphone ruins it all, volume button working fine tho.
The black colour they named it C610 is nothing spectacular, looks nice with ceramic body but sound is just meh. I've tried their other model the Estron C631 which is a triple driver too just recently and it's pretty good too, but only for those who have high tolerance to bright hot treble. It kinda reminds me of the unnamed D2 and i suspect they both use the same dual BA driver.
Good info!
How would you describe the signature of the c630?