I am setting up a home theatre room and I have some matching speakers for the LCR and a beefy subs for LFE. but don’t have much space for the surround channels. I was looking online and found some reasonably priced second hand satellite packages with a small sub. I was wondering what people thought about wall mounting the satellites but using the speaker terminals on the small sub to handle the 80 to 120hz range for only the surrounds. And in my receiver setting the surrounds as small with a 80hz(same as LCR) crossover to the main subs. I would also place the small sub behind the couch to offset the locational frequencies. Is this a good idea or a bad one?