45hz could be adequate for most music if the frequency response is flat at 45 hz and started to roll off at that frequency. I doubt that it is but you must factor in the roll off when doing comparisons. Some speakers that say they go to 45 hz actually start to roll off much higher and you would certainly need a sub for decent bass.
Also consider what 35hz really means as well.......
Also consider what you might accomplish, bass wise, by placing your speakers to take advantage of bass nodes in your room.
FWIW