Thank you both for your answers! ^_^
For important gameplay signals you should definitely make sure they can be heard on those speakers.
While this thread is related to a trailer, that's a good point: I'm not sure that I've tested my actual game's sounds on the laptop speakers. Thank you for mentioning that!
For part of a trailer, ehh, maybe it's not terribly important.
Fair enough--not something to worry overmuch about, then.
If you want bass sounds to be heard on bad speakers, you could add some subtle "sharpness" to it (sawtooth/square wave-like sounds). You still won't feel the oomph on those poor speakers, but at least it can be heard.
Still, I might try what you describe above! I did try mixing in a higher-pitched version of the main sound (a sort of gong-like effect), but wasn't happy with sound of the result. But then again, I did only perform one experiment, and didn't try quite what you suggest above...
Use subtitles. *loud bass thump*
Hmm... I'm not sure that I want to include subtitles in a trailer, unless it's in the form of closed captioning. It's something to consider, although I hesitate to commit to including them in videos in general (as I'd likely want to do if I included them in one video)...
Make the screen shake.
There's already a visual cue along with the sound--the image suddenly tattering into shreds of mist, and evanescing away. the sound is intended to underscore and give weight to it.
See here:
Before the tattering away, music is swelling, seemingly to something good--then suddenly the scene is torn away, accompanied by a gong-like sound.
Sorry, that's all I got.
Not a problem! I do appreciate the suggestions. ^_^