Here’s a new feedback today from customer who purchased Advanced ROM for DX220. He shared his feedback after using free version for a while.

Apollo is quite good. It is more neutral than mango. Mango has increase booster in mid band region, focusing in vocal and the downside, it makes sound a bit muffled.

Overall your Advanced Rom improve clarity, blacker background, deeper staging. Good job.

Thanks
Regards

Apollo included in Purist ROM is a custom built version with my own code optimizations to improve sound quality. Feel free to try it and happy listening. 🙂