Umbra
Hobbyist & CA Tenderfoot
The other day I was buying a AQ 15" sub on Craigslist and the guy also had this homemade box:
I'm not sure if he ever ran the AQ or any other sub in it. He told me it originally housed a 15" woofer and a horn tweeter and it was later modified for sub use. I could tell it was way too small to run a 15 ported in, but I bought it because I thought I could run a 12 or maybe the 15 sealed in it. Before you knock it, it's solidly built and I paid $10 for it, but yes, it does look like ***.
Anyway, I bought it and later put the dimensions into a calculator and figured it should be tuned to around 34Hz:
The box is 14" deep, 15.5" high, and 24" wide. About 2.2 cubes taking into account the wood thickness (but not the port or woofer displacement)
The port is 3.5" x 3.5" and extends 10" into the box.
I made an adapter out of 3/4" MDF so it fits a 12 and I flared the left and right sides of the port with cut PVC. I believe the extra length brings the tuning down a bit. I don't actually know what the flares do, aside from possibly prevent port noise.
I've never had a ported box before, but it sounds pretty good to me. The sub in it is a Memphis Mojo PR, which I believe is more suited for a sealed box. It isn't crazy loud on 250W, but it definitely boosts the low end with only a little bit of SQ loss.
Without any further digression, let me just ask: is that a proper port? Most slot ports I've seen have at least one angle and often run along the back. Is this 3.5" square column a functional port, or am I retarded?
Thanks
I'm not sure if he ever ran the AQ or any other sub in it. He told me it originally housed a 15" woofer and a horn tweeter and it was later modified for sub use. I could tell it was way too small to run a 15 ported in, but I bought it because I thought I could run a 12 or maybe the 15 sealed in it. Before you knock it, it's solidly built and I paid $10 for it, but yes, it does look like ***.
Anyway, I bought it and later put the dimensions into a calculator and figured it should be tuned to around 34Hz:
The box is 14" deep, 15.5" high, and 24" wide. About 2.2 cubes taking into account the wood thickness (but not the port or woofer displacement)
The port is 3.5" x 3.5" and extends 10" into the box.
I made an adapter out of 3/4" MDF so it fits a 12 and I flared the left and right sides of the port with cut PVC. I believe the extra length brings the tuning down a bit. I don't actually know what the flares do, aside from possibly prevent port noise.
I've never had a ported box before, but it sounds pretty good to me. The sub in it is a Memphis Mojo PR, which I believe is more suited for a sealed box. It isn't crazy loud on 250W, but it definitely boosts the low end with only a little bit of SQ loss.
Without any further digression, let me just ask: is that a proper port? Most slot ports I've seen have at least one angle and often run along the back. Is this 3.5" square column a functional port, or am I retarded?
Thanks