At the moment I have a ported 10" subwoofer with the chassis and port at the top. It sounds good, but without the top itīs a bit too silent.
But itīs still louder than my last box, where it was in the rear.
Would a box with a downfiring subwoofer be louder?
Where should I place the port?
Ported subwoofers are more effecient, however they use your trunck/rear cargo area to move the sound. when you take the top off they sound will always go away. I have a dual 10" Sealed down-firing subwoofer. with the top and or doors off the bass doesn't go completly away, but you do need to turn it up a little more.. For what you have I would have the sub/ and or port facing the back. So everything will bounce off the back.
I had a sealed box with the same sub before. The ported box is way louder and deeper.
Are you sure that it will be louder with the top off when I build a box with the sub/chassis to the rear?
On that way the box will have less volume and that will make it 4-5 dB quieter at frequencies between 20-50 Hz.
I had my sub facing the back. But it was a 3^ft enclosure. Took the back seats out to fit it inside the jeep(never used the back seats anyway). I was pushing 2000watts so having the top down didnt change much.
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Not positive as far as the port goes, but downfiring will give some "corner loading" effect where the gap between the cone and the hard surface create some restorative effect or backpressure. Can give some added reinforcement for max output.
Much like firing a sub toward a backseat with a passthrough trunk vs firing toward the trunk.