IB3 15 & 18 useable upper frequencies

[fish 0]

I'm going back & forth between using 2 15" IB3's & 1 18" IB3, but am a little concerned about their output between 50-80hz. I'm going to use 8" pro audio midbass in my doors, but from what I've read they shouldn't be crossed lower than 80hz. Does anyone have any input they can give me on the IB3 line playing these higher frequencies?

[sandt38 448]

Maybe you should reconsider the mids then.

What alignment are these IB3s going into? If they are going to be in an IB installation, would you care to disclose specifics, like how you will isolate them, and how large will the "enclosure" actually be. It may be impossible to get these into a true IB installation in a vehicle, so the top end may actually be more accessable in the alignment then you think.

[Sir-Lancelot 216]

Why IB and pro audio?

What is it you want to accomplish?

[NDMstang65 403]

You should consider different mids then...most IB setups are crossed around 56Hz..