Yes, they will fit a 2.5" tower. How loud depends on where you are standing.....surfing, party cove or boarding, and how they are powered and tuned. You're gonna need about 50ft of speaker wire, a set of RCA cables, power cabling and circuit protection and a some 16ga primary wire for the amps remote turn-on, These are the basics.
And I agree with Brian, the new KMT60 looks much better.
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