f3 is, in this case, your sub's LF cutoff. For example my towers' f3, per Polk, is 35hz. My front sub rated & tested to 20hz.
The PSA website has my sub rated down to 19Hz.
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Paradigm Studio 20v5-fronts
Paradigm Studio CC-490v5-center
Paradigm Studio 10v5- side surrounds,Monitor surround 3v7-bck surr
Oppo UDP-205/LG 65C6
Outlaw 976 prepro/ Emotiva BasX A-700 amp
Power Sound Audio 15S
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