Originally Posted by treads
I'm in the same boat. I have a single Empire that I purchased with plans to add a second one down the road. Now that option is off the table, so I am trying to pick a second sub that would allow me salvage my investment in the Empire.
HSU used to sell a "mid-bass module" that was intended to be placed near field, and coupled with a larger sub to handle the lower frequencies. I was wondering whether I could use the Empire (touted for its mid bass performance) in a similar manner, or whether that would just be a waste of a decent sub? Currently I have the Empire placed in the front left corner of the room, but could relocate directly next to the seating area. Then I could add a new sub to where the Empire now sits. I'm not sure exactly how you would "split" the bass frequencies between the two subs, as I believe the crossover for the Epik acts as a low pass filter, and so I am not sure how you would limit it to mid-bass duties. I guess you could use an in-line filter on the Empire to limit the lower frequencies, but don't know if that would cause any problems with Audessy (I am currently running MultEQ 32). Any ideas or suggestions would be appreciated. I may just have to bite the bullet and get a new sub, knowing that it may replace rather than supplement the Empire.
Incidentally, if anyone in the central or SW Florida area wants to either buy or sell a single empire, I would be more than happy to either double down on a second empire or sell my existing one and start from scratch. Just PM me with any interest.
There are external EQ options such as the minDSP that can be used to apply a high pass filter to the Empire if you decide to use it for only mid bass. You can also try an in-line filter like you say but I've read they can impact sound quality. You could then set the low pass filter on the new sub to pick up at the frequency where the Empire ends or have them overlap and both cover mid bass. Not sure how this would impact Audyssey but think you'd be OK; that said, I don't think I'd try it without the ability to measure the results.
I have an Empire and Legend that I've used together and recently added 2 DIY Dayton 18" subs to my room and use all 4 together. I have the Epik gains set around 1/4 and have the subs placed along the side and rear of my room to fill nulls. Similar to what you're thinking, I considered adding a HPF to at least the Legend but ended up not doing so. I'm very happy with the sound of all 4 together. If you're up for DIY, I'd recommend it.... best thing I've done in my home theater room. If I lived in Florida, I'd gladly sell you my Epik and use the funds to replace it with another 1-2 Daytons. Before deciding to go the DIY route, I considered adding a PSA sub - they seem to be the closest to the Empire from what I could tell; again, very glad I went DIY though.