I'm not sure, but to my ears the frequency doesn't change, just the volume gets louder.
To be effective, however, their must be a compression effect which protects the speaker from the lowest freaquencies.
Personally, in the case of subs, I would always set the size to max. These speakers are designed to take a lot of punishment and most have their own built in protection.
Cliff
Cliff
Main system - Sources (Kodi-HTPC, Vero 4k, FireTV, Sat) into Trinnov Altitude 32 (8-16) (+Roon), Trinnov Amplitude 8 amp & Vivid Audio (Giya G3, V1.5) and REL Stentor III speakers. Others: F80 + Raspberry Pi and other Pi systems.
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