[brianaker]

The film "War of the Worlds(2005)" has effects going down to 20 Hz; to play it you will need an ATMOS AV receiver that has an LFE port to feed the signal to an amp that has LFE input. Not all amps which have an LFE input can cleanly output 20 Hz, let alone anything lower, so you would need to check the specs.

I wouldn't be surprised to discover that the original "Iron Man" movie reproduced effects at that level, but I know the "War of the Worlds" film does.

[toast0]

Why atmos? Wouldn't any receiver with a subwoofer out do? Many subwoofers have a crossover and you can could also wire your audio out through the subwoofer and then to your speakers if you really want.

[vGPU]

There’s a difference between sub out and LFE. Sub out usually can’t accurately do frequencies that low. I believe LFE is Dolby tech too.