Goes very low for a 10 inch, pretty tight and accurate and has a really long excursion.
Almost none except that this puppy is way over priced considering the price of ED subs. Should have priced at aroud 349$ instead of 529$
I'm a proud owner of this Energy Sub that I have found here in Canada for 275$.
This sub is tight and accurate and fast enough to make any kind of music sound it's best and the ribbed eleptical surround hleps it reproduce sound with the lowest possible distortion.
In HT this sub really shines with a frequency response of 21hz at +/-3db it will put to shame alot of bigger subwoofers.
I have seen some 10 inches go as low as 18hz at +/-3db but all in all this puppy is really good.
It 's absolutely insane to hear the gun shots in Max Payne and in Terminator Salvation when John Conor uses the machine gun in the begining of the movie. It's really pounding hard. It does reproduce frequencies below the audible limit. Not being able to hear an earthquake in a movies but being able to feel it is quite impressive.
For the price I paid I consider I got a great value for my money but retail price for the US just did not make sense at 529$, since the A2-250 from ED retails at 350$ and has the above mentioned frequency respose at 18hz at +/-3db