How high do subs go

Hello, Not only do cheap ones go to 80hz but good ones too. That is where my woofer system is crossed over at. You may see them in "my system". They are not "your average bear". Good subs require a bit of surface area, especially if they are going to intergrate with electrostatics. It also goes down to 20hz quite well. I think that good subs should be capable of higher freq. They intergrate easier if they do with any speaker system.
Bob

Hi Kal yeah sorry that 80 hz was a typo. I do in fact crossover my woofer system at 185hz. Now the question is what makes someone call a subwoofer a subwoofer? Should I call my sytem a subwoofer, since it goes to 20hz or as I presently call it a woofer system since it is crossed over so high? If your system is capable to 20hz but you are not using what is commononly referred to as a sub ie: 12'-18"+ drivers in a mono or stereo configuration, do you effectivly have a built in sub? What if if you are crossing over (like myself) your low freq speakers at 185hz (or perhaps 150hz, 110hz or 90hz)? What about full range speakers that are cabable to very low freq, but are not using a sub, is it OK to say that we are listening to subs because you have 20hz or so? Or does a subs features mean that it is limited in freq to a low number (and what would that number be?) and must it be seperate? How many full range speakers do not need a sub?
Bob