Lobarkaine
100+ Head-Fier
Very interesting your replay.baskingsharkTBH there are not many cable down IEMs (most are over ears) and there are very few "flat signature with deep subbass" at the budget segment. Most stuff are tuned harmanish or V shaped for consumer preferences. So your 2 criteria would probably be hard to fulfil. I can't think of any other IEM at below $100 that is neutral with subbass boost (and that can be worn cable down). That kind of tuning is usually seen in the higher end market.
The IEM you mentioned has quite good soundstage and technical performance, but the timbral accuracy for that set is bad. I had bought 2 sets of that, but sold them away cause of the timbre.
If you want something with big subbass with good technicalities, maybe read about the Urbanfun YBF-ISS014. It has very textured and deep bass, but there are QC issues (due to wonky MMCX or driver doubt), so best to buy it from somewhere with a robust returns policy. Also the Urbanfun is V shaped, so the mids are recessed.
Hope the others can suggest something appropriate, but neutral with subbass boost + cable down at < $100 USD is gonna be a search for a needle in a haystack. You might need to compromise on some criteria TBH.
Now I'll really like to know some iems with the Urbanfun YBF-ISS014 bass/subbass but more airy, better mids and trebles estension but not shouty.