They are mainly a good, daily, entry level sub //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
Low-end extension was the primary focus of the design. You can get an F3 of 25 Hz in a small vented enclosure! Spent a good deal of time getting a very symmetrical BL curve and a full 12mm of linear x-max, so distortion is low too.
They also get pretty loud... I installed two for my Dad behind the seats of his regular cab truck and it does over 130 dB with the windows up and over 137 dB with the windows down @ the windshield on the TL. Tuned for classic rock for my Dad //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif