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Ah, thanks for the reply. Someone sold them to me for a very cheap price, so that's why I have them. If I was buying new, I would probably get more SQ oriented subs. I might try out both ways to see which I like better.

DId the sound ever get muddy when playing fast music? How about drum kicks?

J R, what type of music did you listen to in the ported box? was it as clean as the sealed? thanks

I see. Thanks for the response.

I've got 2 12's (1242d) and am probably going to build a ported box for them. I was just curious if anyone has ever had them in a sealed box, and how they sounded. Or if anyone has had them in a ported box, how they performed.

Do you think Alpine type R 12's would be ok in a t line box? Im about to build a sealed box for them, and experiment with either a ported or t-line with the rest of the MDF (I have a few sheets)

I see. I listen to lots of rock, metal, dubstep, and house music. I may consider building one to see how it sounds.

How do transmission line enclosures operate? What makes them different than regular ported enclosures? How do they sound in terms of SQ, and note definition (rock and metal, lots of fast drum kicks.) How much louder are they than sealed and ported? Thanks.