My house is full of subs, nothing matches. It's time to get coherent.
I've got a Velodyne "12, Earthquake "15, two Vandersteens that I could never get to work, and two Epik "12 subs that were OK.
It's time to get serious. Music only.
Please help me save money.
Seriously? This is almost too easy. rbshafer, you are there. All you do, hook them all up. They do not need to match. Mine don't!
https://systems.audiogon.com/systems/8367
b_limo is right, search DBA/Swarm. You've got four perfectly good subs. Six, if you connect the 2 Vandy's to something and run them passive. But even just the four you have will work great.
I know, everyone thinks speakers have to match. Well, speakers yes. Subs no. Which you have plenty. Don't cost nothing. What do you have to lose? Just when you get done being amazed please come back and let us all know. There's still a few haven't figured out DBA really does work.