it is the exact same sub as the quantum spl sub except basket and cone. the spider and platform too. same motor as the db drive plt too.i am a db drive and quantum audio dealer. these are great daily subs just not the greatest for numbers.
1 10" i do a 40.6 with 3k, custom 10" with VERY simular motor 43.2 & i have a totally diff 10" that dose 44.1 same amp and box.
the sub sounds decent and gets down with some mech noise with over 2krms (cone to spider). i cant blow it with 3k on tap ( want to blow it to make it loud),lol....