As several previous posters in this thread indicate, streamed bass leaks out of an open fit. You can lose as much as 30 to 40 dB of bass. An open fit has the advantage if you have good low-frequency hearing (ski slope loss) that allows environmental bass to easily reach your eardrums and sound natural.
I have ReSound Omnias 962s DRW, IIRC. I like to wear a very occlusive fit because when I want noise exclusion and binaural beam forming, that gives me the best directional speech, e.g., in the Front Focus or Ultrafocus mode, the least environmental noise is leaking directly to my eardrums. (I have good low-frequency hearing, so, unfortunately, I can hear environmental noise unamplified by my HA’s all too well).
So when I stream, bass is trapped in my ears. I also boosted the streaming bass to Moderate in the “equalizer” adjustment in the Smart Fit fitting software (there’s also a Strong option). Even so, I have deliberately amplified my high frequencies by using the NAL-NL2 fitting algorithm rather than ReSound’s proprietary Audiogram+, which is more tuned for “user comfort.” I find that amplifying high frequencies helps pick up high-frequency speech and speech cues. Turning up high frequencies and mid-tones and turning down bass is essentially what the Speech Clarity button does in the (Smart 3D) smartphone app. YMMV. If you have an accommodating HCP, I’d ask him/her to make further adjustments and see how you like any tweaks that might help you. Don’t just take your HA’s out of the box in the standard setup.
I trialed the Phonak Lumitys back in January 2023, and I thought the bass was better, but I didn’t want to trade better bass for a shorter battery runtime (I got Omnias with size 13 disposable batteries), lack of MFi and Apple Watch connectivity for the controlling app, and the app being slow and clunky compared to the Smart 3D app. Phonak makes a great HA. Don’t know why it can’t make a better app!
I commented on Omnia bass in the following post: New hearing aid comparison engine - #6 by jim_lewis
With the Omnia telephone calls are very clear and natural sounding. Streaming with my molds and the bass adjustments sounds great to me (certainly not equivalent to my home or truck audio setups though). Hopefully, your HA’s just need some adjustment.