i was looking through posts in this forum for sub reccomendations and took a look at Martin Logan's subs. i noticed that they implemented a driver inside the box to eliminate box coloration and muddy bass. i am wondering if there are any other companies that do this at a lower price point. if not i am wondering if there are any other subs that have low coloration at like $500. this isn't for a purchase just a mental exercise.
Put "isobarik" into a search engine for a mental exercise.
I know M&K puts drivers inside the box in most of their MX series subs and let me tell you they all sound pretty crisp IMO, but price can be an issue on some models.