Enclosure question?

[bigtoysr4us 0]

Hey SSA Members I have 2 Mtx 9510-44 that I am looking to design an enclosure for, now I'm not to sure if its possible but I think it is, I would like to be able to do hair tricks, for power I have a Lightning Audio 3000 watt mono amp which is putting out a steady 1900 watts, the car is an 03 cavalier with factory electrical big 3 and two optima red tops. I'd like to fire the subs forward and possibly run the port on the rear deck lid sealing off the trunk from the cabin. my max dimensions are 36x16.5x24 I dont think it needs to be that big but I am new to hair tricks so I need some direction Thanks everyone.

[bigtoysr4us 0]

nobody has any tips or tricks for doing a hair trick, I thought I posted this in the right forum to get help.

[Impious 1,476]

Sorry, but hair tricks with 2 9510's from a trunk on 1900w isn't going to happen. Redefine your goals to something more realistic and we can try to assist you.

[bigtoysr4us 0]

now are my goals needing to be redefined due to current power that I am running, or is it because of the woofers that I have. Please elaborate on your answer

[Impious 1,476]

Primarily your limited cone area and enclosure placement/cabin space. Majority of the people doing the massive hair tricks have walls and/or multiple times more cone area. Two 10's from a trunk in a sedan aren't going to do the hair tricks you see on YouTube, atleast in any manageable installation.

If "hair tricks" are your goal (given your line of questioning, I'm assuming it is), then you need to entirely redesign your system and given the size of the trunk in a Cavalier, you would need to step up to a wall. Then I would suggest you look into increasing your cone area as well and fit the largest quantity/largest diameter drivers you can fit in the airspace. Granted given proper enclosure design and construction as well as driver selection 1900w would probably achieve your goal, again most of the people doing the YouTube hairtricks are running 3x or more that power.

Based on your line of questioning, I would suggest you refocus your goals. Designing and installing those types of systems take a significant amount of knowledge and experience to properly setup. It doesn't appear you are there yet.

[bigtoysr4us 0]

I really think that it is an achievable goal I might be under powered for what I want to do but I know its possible, I'm just not sure on what design aspects that I need to be focused on be it more port velocity or maximizing cone movement. My skill set is far more advanced than that of my posting status its just spl isn't my normal area of the industry.

[Frostedflakejake 148]

I really think that it is an achievable goal

I would go ahead and argue that you should take Impious' advice. Not only is he extremely knowledgeable, but I also agree with him to the fullest on this. The combination of equipment you have is holding you back.

You need more cone area and more space at a minimum. Exactly like Impious said. You want to move as much air as possible inside of your cabin to push that air out of any openings (windows) to make the hair trick happen. Sure, you can try it with your two 10's in the trunk all you want. I'm not a betting man, but I will bet that you won't ever achieve your goal.

[Impious 1,476]

I really think that it is an achievable goal I might be under powered for what I want to do but I know its possible, I'm just not sure on what design aspects that I need to be focused on be it more port velocity or maximizing cone movement. My skill set is far more advanced than that of my posting status its just spl isn't my normal area of the industry.

I wasn't trying to insinuate you were generally unknowledgeable, rather this is not your area of expertise. It wasn't based on your posting status, but rather the questions you were asking.

If you really want to pursue this, there are some general guidelines. Look at what most SPL guys have to give you some clues. Large enclosures with tons of port area generally arranged in a manor to minimize cabin space.

So, first this should tell you that you would want to avoid a high vent mach. High vent mach/port velocity will lead to compression of the air in the port, which will cause large amounts of port noise and reduce the efficiency with which the air in the port can oscillate. So you want to use a port with large area to reduce port velocity, but on the other hand if you go too large the mass of the air in the port can become too much for the driver to effectively utilize. It's a balancing act. Second, you want to create a "path of least resistance" for the air in the port to more or less reduce drag on the air as it oscillates within the port. Also, port design/shape will have an affect on the turbulence within the port, which is one of the reasons many people use aeroports, flares, and 45's or PVC in the corners of their enclosures and ports. To reduce turbulence.

As for the enclosure, generally you want the enclosure on the larger side. Larger enclosure = more efficient enclosure with a larger peak at tuning. Yes, you want increased cone excursion as more excursion equals more air movement. Load a driver in WinISD and compare the cone excursion graph of various enclosure sizes of the same tuning on the same power. You'll notice as the enclosure size increases the cone excursion increases as well.

For tuning, you will want to tune higher. You'll gain peak output and better match the resonant frequency of your vehicle. You're not going to be doing hair tricks with a 30hz tone, especially with your setup. It will be more in the 40's and 50's. Tuning high will obviously cause your low frequency response to suffer, but that's the trade off.

From there, it's all about experimentation and what works for your subwoofers in your vehicle. Those are just basic generalizations. I still believe you are searching for a unicorn here, you don't have the basic foundation upon which those types of systems are built. But if you want to spend a bunch of time and money (MDF, glue, screws, etc will add up quickly, you'll need to build and test and build and test and build and test) to pursue this endeavor, there's some basics to get you started.

[bigtoysr4us 0]

Awesome thats what I was looking for when I finish the new design I'll be putting it up in the Build section. thanks for the help.