It is enough for most of the sound to set your speakers to 35Hz frequency crossover but it is not suitable for bass sounds. If the subwoofer is capable of going to just 35Hz and not beyond that, then it will not throw a deep bass. This will dramatically affect the whole movie, gaming, or music experience. You will not get the quality that producers want you to get. You need a subwoofer that is rated at least 15Hz, after that it can give realistic and deep bass. And this 15 is way lower than 35. It is basic mathematics.