I have just received my Somic v4 last week and been listening them through the Opus #1 and Shanling M1. I would say it has decent sub-par, provided you have a good seal (the housing is relatively small and with angled nozzles, albeit shorter). To me it is definitely brighter and more musical than the Tenmmak Pro which sounds smoother and warmer.
Thank you! I will probably wait for my Somic v4s to arrive before I think about ordering the Tennmak Pros. As long as Somic V4 is not too bright, I don't think I will order the Tennmak pros in a hurry.