any music recorded between 69-80 will have lots of subbass
it's only a popular trend to empasize high end, and 50-100hz 'beat' frequencies, a la pop music
any more most music's recorded to emphasize those freq's to make it sound good on crap car stereos, and portable mp3 players, etc.
not too many people give a crap about a quality system anymore, so the record companies don't give you nice flat recordings to work with, because they'd sound like poop if you didn't know how to make 'em sound the way you want