Bass so loud it HZ
CarAudio.com Regular
I had a guy build me a wall and it's similar to a 6th just doesn't have a front port so right now its pretty much just a ported wall. I believe it can be done no problem. what do you guys think ?
Some random data for you relating to accoustic coupling:
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You can see how the wavefront stays coherent as it matches or more closely matches the surface area of the cabin (height and width), like waves and air flowing through your clam slowly expanding and contracting as one, instead of abruptly expanding and breaking apart more, like if your port just immediately opened to full cabin area. It’s really air impedance, but haha I’ll leave it there.
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You should be able to play way above 40 if tuned to 27 hz. The tuning may be wrong or you could have a loading issue; I’m not sure.I've never really seen to many ppl running a clamshell. But I will say for just being a ported box and not having a loading wall it plays a pretty wide bandwidth .it's supposed to be tuned at 27hz but will play under 20 up to 40 with it peaking in the high 30s. It also moves air pretty good which is what I was going for. I got a 158.9 out of it so far but would like to get a little more out of it. I really havent tuned my amps very well or deadend my doors yet so i think it has more. But thats what i was wanting to lower the back port and raise the front port . I figured with a loading wall it would help me to get the wind I'm wanting and also help me peak a little higher so I can also get a higher spl score. But I'm not real knowledgeable when it comes to bandpass enclosures.
I just went out and tested my bandwidth and it plays down to about 15 can't hear it tho of course and about 40 it starts to fall off after 45 it really falls off . I thought with a ported box you wouldn't have very much bandwidth ?You should be able to play way above 40 if tuned to 27 hz. The tuning may be wrong or you could have a loading issue; I’m not sure.
What’s the vehicle, is it a b or c pillar wall, how much wattage are you running, and what’s the ohm load on the amp from the subs? And that’s 4 18’s?I just went out and tested my bandwidth and it plays down to about 15 can't hear it tho of course and about 40 it starts to fall off after 45 it really falls off . I thought with a ported box you wouldn't have very much bandwidth ?
04 jeep grand cherokee b pillar . Two surge 10ks at .5 per pair of subs l. Yes 4 18 inch rs plats.What’s the vehicle, is it a b or c pillar wall, how much wattage are you running, and what’s the ohm load on the amp from the subs? And that’s 4 18’s?
Ok. You have 4 18’s on let’s say 20k to make it easy. Your cabin is relatively tiny. That box being in your cabin is like 4 18’s playing inside of a large sealed box or look at your box in reverse like your cabin is your sub chambers. My point is that your cabin isn’t that big and should be well pressurized by the absolute monstrosity of a system you have; that’s a ton of wave energy density per volume of air. You are losing pressure in the cabin fairly early for being tuned at 27 hz, which you really should check to make sure the tuning is that from the structure of the box. For it to fall off that quickly and not be tuning, you’ve got too big of a box, port issues, 1/4 wave cancellation issues (or some other phasing issue), something of that nature, if I’m understanding you correctly. There’s a mathematical reason why it would fall off that hard, so I would figure the why before you figure the solution.04 jeep grand cherokee b pillar . Two surge 10ks at .5 per pair of subs l. Yes 4 18 inch rs plats.
Yeah I'm not that knowledgeable on all this stuff man . And I play it with one window down if not it's not as loud but it is louder at higher freq sealed .I paid alot of money to have this built . It was supposed to be a 6th order but dude messed up and built it for 2 18s . Then had to tear the baffle and all that out and this is what he came up with .If you could wire to 2 ohms, you could see if sub movement is stressing the amps too much at .5. You’d see how it plays wired higher, especially comparing db changes over a range, because playing away from tuning can cause way more stress on the amp, which causes the amp to electrically not be able to handle energy from the coil moving more from the woofer unloading, basically. You could try some things like that too. I don’t think any of this is going to be particularly simple or easy to figure out with all of the factors.
I haven't even attempted to play that high I've went up to 55s and I mean it plays but it's not loudHow do the subs respond at say 60-80hz?