has anyone had any experience with either of these subs, i currently have a klipsch synergy 10 and im wanting to get a bigger sub and while i have two i can just put the klipsch in the back of the room

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but seriously anyone know if those are any good, i need a good 12 for under 400 bucks. i can get the cadence 12 for $249 and the 15 for $349
I am looking for something that sounds good, my acuostics in my basement arent very good so i need something to make up for that
Thanks for any input