- Mar 1, 2018
- Gold Coast, Queensland, Australia
To add a basically but not utterly irrelevant aside, if I may:
Long, long ago, there was a flurry of "sub-bass synthesizer" products (all analog, AFAIK) that did the same thing, but in the other direction (i.e., added some signal at half the fundamental frequency).
View attachment 214612source: https://worldradiohistory.com/Archive-All-Audio/Archive-High-Fidelity/70s/High-Fidelity-1978-09.pdf
This one may have just been a tone control, though, for all I know.
View attachment 214613
N.B. Note that I didn't say these products worked well.
The Realistic Bass enhancer is a great little product. The only real issue with it is residual noise. It's basically a parametric EQ with a very good subsonic filter, so good for both vinyl and small speakers.
It was an add-on sold with Minimus 7 and other small speakers for years.
I've got one here and ran some FR plots on it a while back if anyone is interested in seeing what it does.