Hey guys, I'm new here and have been trying to do a bit of research on getting a ported box made. Depending on how confident I feel, I may attempt to do it myself, or have someone else do it for me.
I'm doing a stereo build for my 1991 BMW 325i coupe. The car currently has rear deck speakers, but they will be going out and I'd like to aim the ports so they fire from the previous speaker cavities.
The setup is going to be 2 e3.8 woofers by Elemental Design.
They will each be getting about 100rms from a nine.4 amp, also be eD.
I'd like to keep the enclosure as narrow as possible, and here is what I came up with for the box dimensions. What I need help with is finding the port size and type, and the placement of the ports as well as the subs.
Here is what I came up with.
The sub specs are as follows:
Voice Coil: 38mm
Magnet Width: 4.800"
Cutout Diameter: 7.250"
Mounting Depth: 4.375"
Total Height: 4.900"
Outside Diameter: 8.375"
And the recommendation for box sizing is:
Vented ( ideal )
.5ft³ Tuned to 30Hz
Vented ( DDLoud)
.7ft³ Tuned to 35Hz
I see a lot of people going with the slot/square ports now, and not so much the round plastic ports. Is there a reason for that? I'd like to stick with the round ports, as they seem to be more idiot-proof. What I need is dual ports, and also having them as close to the edge as possible so I can aim them into the factory deck opening.
I'd appreciate any pointers or help. If you need more information, I'll do my best to provide it to you.