Trunk help (40hz+ lacking)

[afearlesshunter]

Aight. New build I'm trying to get rolling here. Specs

Forward firing (into cabin right behind seats)

2: Soundrive SDA 3's

2: 2.3 cubic ft enclosures tuned to ~30hz

Smallish port area.

Is not sealed off yet

Playing on 300 @4 ohms (probably rising more than the national debt)

Issue:

Above 37hz or so, there is a major drop in output. I have not tried sealing anything off yet and I assume there is cancelation, just don't know how much that might affect output. I am triple checking phase of each woofer tomorrow.

Any advice from experience with trunk walls etc would be great, thanks again guys.

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[Jeffdachef 5,000+ posts]

Seal it off first.

 

[trumpet 5,000+ posts]

Get some pool noodles, cut them as needed and stuff the gaps around the enclosure. It will make a huge difference.

 

[afearlesshunter]

Alright, Sealed it up with plumbing insulation tube and.. not much better. Both subs are in phase with the other. I believe Im going to wait to see if full power helps the issue, If not I might increase the port area and tuning slightly.

 

[Jeffdachef 5,000+ posts]

Alright, Sealed it up with plumbing insulation tube and.. not much better. Both subs are in phase with the other. I believe Im going to wait to see if full power helps the issue, If not I might increase the port area and tuning slightly.

Check all seals with a piece of paper to see if there is air movement anywhere.