Round port help

[Banzai250]

Hello everyone! Newbie here with a dumb question please! I’m currently running a 3 inch round port on same side of my American bass xd12 woofers ( two woofers with wall between, 2.15 cu ft each ) I like to run 4 inch port but I don’t have enough space to fit the woofer and the port together ! My questions is can I run 4 inch inside the box and connect with a 3-4 inch reducer ? Would it make any difference ? Btw right now the box are tune to 30 hertz , Thanks in advance

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[THATpurpleKUSH 5,000+ posts]

Keep the same size port. Using reducers will **** with tuning and cause compression on the port which will hurt output.

3 inch ports are undersized for those woofers. You need to be using 4s or a single 6. You can buy pvc elbows at hardware stores to bend the port tubes to achieve your desired length.

 

[Banzai250]

Thanks for the reply ! I don’t think I can fit 4 inch port to the same direction as the woofer , let me ask you this , are 2.0 cuft enough for the AB XD12 ? I also pick up a set of Audio pipe Txx-Bd2-12 . Will it work in the same box or I need to build a bigger one ? Thanks

 

[THATpurpleKUSH 5,000+ posts]

2cf is fine for the XD12, you could go a little bigger up to 2.5cf but it might sound a little boomier.

I have no clue what size enclosure that Audiopipe sub would need, I have never used their subs.