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[RooTxBeeR]

May I ask why you suggest 12sq in of port? I would think more port the better for getting the air moving.

moving air and hammering the lows with authority while sounding good are two different things. 12sqin of port will sound much better at 25-30hz than one with 16-18 sqin of port, if the box is designed right. The more port will be peakier also and have quicker roll off than one will less port area. A lot of youtubers or forum people may suggest out of their ass that you need the most port area possible. I suggest going to a couple different Meca or sound comps and listen to some different setups. It is very surprising to sit in a big hair tricking setup only to realize it doesn't sound that good.

Not saying this against what you are telling me. I was looking at a design i put together with 60sqin of port, at 14.4 per foot i believe, I actually never go above 15 when I design things, if that would make any bit of a difference. How would the highs be different on 12sqin compared to 14-15?

[kl0wn]

I have to agree with TeamHT, I actual found the topic and read it all and I didn't really see that big of a problem.

[Omega5002]

May I ask why you suggest 12sq in of port? I would think more port the better for getting the air moving.

moving air and hammering the lows with authority while sounding good are two different things. 12sqin of port will sound much better at 25-30hz than one with 16-18 sqin of port, if the box is designed right. The more port will be peakier also and have quicker roll off than one will less port area. A lot of youtubers or forum people may suggest out of their ass that you need the most port area possible. I suggest going to a couple different Meca or sound comps and listen to some different setups. It is very surprising to sit in a big hair tricking setup only to realize it doesn't sound that good.

Not saying this against what you are telling me. I was looking at a design i put together with 60sqin of port, at 14.4 per foot i believe, I actually never go above 15 when I design things, if that would make any bit of a difference. How would the highs be different on 12sqin compared to 14-15?

I've read that lower port area on tuning >30 hz gives you better range, like if I recall, one of the members mentioned he had a box tuned to 30 hz with 10 sq in per ft, and he could play from 18 to 65 hz with no problem, and that the lower tuning doesn't need as much port as the higher tuning due to the peak air velocity being at frequency lower than typical music from what I read.

[KillaCam]

TS;DR

[SWIFT]

May I ask why you suggest 12sq in of port? I would think more port the better for getting the air moving.

moving air and hammering the lows with authority while sounding good are two different things. 12sqin of port will sound much better at 25-30hz than one with 16-18 sqin of port, if the box is designed right. The more port will be peakier also and have quicker roll off than one will less port area. A lot of youtubers or forum people may suggest out of their ass that you need the most port area possible. I suggest going to a couple different Meca or sound comps and listen to some different setups. It is very surprising to sit in a big hair tricking setup only to realize it doesn't sound that good.

Not saying this against what you are telling me. I was looking at a design i put together with 60sqin of port, at 14.4 per foot i believe, I actually never go above 15 when I design things, if that would make any bit of a difference. How would the highs be different on 12sqin compared to 14-15?

Typically the more port area will hit the higher notes harder than the lower port area box but falls off very quickly below tuning or way above it. This is assuming box boxes are tuned at 30-32hz and same cube size.

My last setup had 11.5 sq in of port and loved the lows (3.65cu tuned at 29hz) for one 15. I could play a sweep and it had about the same output from 25hz all the way to 45hz to the ear. Yeah the next guy could beat me on a meter at 40hz but mine "sounded" much better below 35hz.

My current setup is the same way, I now have 14.5 port area but the SP4's have a high Xmax and can handle the port area better. Mine may not meter as high as some others but sounds incredible and I never build for the meter in my own vehicle. But even with the SP4's the rollout to the ear is quicker than before and I may actually try less port area to see how it reacts.

[RooTxBeeR]

Well the SSD's have 20xmax, while SP4's have a whole crapaly 33 lol, first time I ever seen what it was, WOW. SO you think maybe a tuning of 33Hz with 12.5 sqin per foot, and about 4.1-4.2cu ft would work well?

[SWIFT]

Well the SSD's have 20xmax, while SP4's have a whole crapaly 33 lol, first time I ever seen what it was, WOW. SO you think maybe a tuning of 33Hz with 12.5 sqin per foot, and about 4.1-4.2cu ft would work well?

That would work fine and play a wide range of music. If you have the room I would go with at least 4.5 net after all displacement.

[RooTxBeeR]

I will check, i was alwways used to designing with 14-15sq in of port and those take up a lot more space

[TeamHT]

Less port with lower tuning has worked out better for me in many installs. I too, also believed lower tuning and gobs of port. But response, authority, and ability to get low was more noticeable to the ear and termlab with less port. 12^2 of port is what I'm doing now with six 15"s, 12k watts, and tuned to 30hz