Experience thunderous bass with the Harmony Master 12" competition SPL subwoofer. This non-enclosed subwoofer features dual voice coils and a power handling capacity of up to 1500 watts RMS. Its 2 ohm impedance ensures that your car audio system delivers clear and distortion-free sound during high-powered performances. The Harmony HA-ML122 Monolith is perfect for car audio enthusiasts who crave powerful bass without compromising on sound quality.Google these subs for specs and reviews . You will not be disappointed.  They are in very good condition..priced right!! I had to charge a little for shipping these are extremely heavy subs..I bought 4 18s same brand and same series.  Thata why I'm selling . No longer have a use for them. My feedback speaks for itself..These are terrific subs that will handle waaay more than 1500 rms..7k dynamic on two subs will not phase them.. they stay cool and have 8 layer dual copper voice coils..Dual tensil leads , 4 guage speaker terminals You can't go wrong with these subs..just my two cents.. This is for TWO subwoofers Will only ship to lower 48. 

This sell is  for 2 subs not 1 , no box included . However I do have multiple enclosures for 12 inch subs.  I have a custom concept enclosure tuned at 36 hz , dual 6 inch aero ports. 100% birch and carpeted that could be sold as well.  This enclosure will allow fitment of most 12 inch subs encluding x series sundown , Harmony audio monolith and Fried Rice 12 inch subs .