Is a difficult subject, partly because the term is so wide ranging and so vague.
Most music, excluding perhaps some electronic music and a church organ, will be happy with an in room response down to about 70hz with the response rolling off below that. After all, that is the basic response of music cut onto an LP record, 12db/octave with a -3dB point at 70Hz, this was the norm for all 'popular' commercial recordings and a few specialist lables apart it still is.
Digital can and does have a response that goes much deeper but for 'classic' rock it really is not needed, what is required is a tight, powerful response in the couple of octaves above 60hz. Subwoofers are designed to fill in below 60hz, they will not give you more punch or more presence, on some recordings they might give you some 'weight' to underpin the music but it is remarkable how little it contributes in other cases...