Sneak Peak at the new system

[S8track16]

I think they can handle quite a bit of pressure before anything bad happens.

[negolien]

Thanks I don't want to damage them. This will probably be the last upgrade for me unless later I decide to throw some Polk's in the trunk. Damn Fry's is always having that sale for $150 and well I just might not be able For resist for ever lol.

http://www.frys.com/product/5481739?...H:MAIN_RSLT_PG

[JonStoltz]

dude how did u get these big pics up, im trying to do the same

[JonStoltz]

trying to get those pics up of my installation and wont let me cause of size

[S8track16]

Upload them to photobucket and copy the url image links into the posts.

[negolien]

Originally Posted by S8track16

Upload them to photobucket and copy the url image links into the posts.

Yup photobucket is what I use also. You can use thumbs too then when we click em they get bigger. Interested to see how things are going :<)

[S8track16]

The twin arrived today, time to design a new box and seal off the trunk.

[negolien]

We should start a pool to see what the first part to rattle off is

[S8track16]

Lol, my rear bumper is getting a bit loose on the sides, i'll have to keep an eye on it.

[S8track16]

Rather than letting my other sub sit on a table, decided to take apart the front of my current box and change it up for 2 lvl 4s.

[tw0123]

lmao!! good job Brandon!! those subs make that box look tiny hahaha!!!

[negolien]

The volume for two is the same as 1? How much power now the same or you get a different amp?

[S8track16]

Same amp but it's wired to 1 ohm so I get a bit more power. The volume is half now so my tuning is around 40hz. It will be used as a temporary setup, or at least until the July 13th competition. 40hz= higher spl number

[tw0123]

Sweet man. Where is this competition on the 13 th?

[S8track16]

Ottawa boomfest

[tw0123]

Sweet. I'll be deep in work that day unfortunately. Just found out its the Lindsay downtown's annual classics car show that same Sunday.... they're expecting 800 cars to full downtown. Can't afford to pass up the potential business that day!

[S8track16]

Damn, 800 cars downtown, is there enough room for that? And ya, business should be really good that day.

[tw0123]

Yeah it's a tight squeeze for sure! It's usually my second busiest day of the year but the last couple years they've let outside food vendors in so it's sucked. I got together with some of the other restaurants in downtown and complained so we'll see how this year goes!

[S8track16]

Decided to make a new subwoofer box actually meant for two of these subwoofers. Around 2 cu ft. per chamber and tuned to around 31-32hz.

[AleroB888]

Originally Posted by S8track16

Decided to make a new subwoofer box actually meant for two of these subwoofers. Around 2 cu ft. per chamber and tuned to around 31-32hz..........

Nice work!

I don't think the distance between the drivers would cause a loss of output at very low frequencies, like below about 50-60 hz. At 100-200 hz, possibly, depending on where they cross over. Outside the car up on a stand they might lose some output, but not in the confined space of that car.

It makes no difference what direction the current flows, the result is mathematically the same, and depends on the resistance in the circuit. It is usually easier and better to ground with a short cable to the chassis, if the grounding point is chosen carefully. If you have a negative cable already run to the trunk from a battery near the engine, just connect another negative cable to a point in the trunk and see if the voltage increases. If it does, then disconnect the longer cable and check again.

That port is a very complex situation with the two enclosures feeding into one opening. The linear distance between the backs of the drivers to the large port opening can affect the tuning, as well as the mass of air in the port. Boggles the mind! I guess if the computer app used a model specifically for that, you should be ok. The other variable on the port is the length of the duct, which can reinforce or cancel certain frequencies. That can be an advantage, if you choose an optimum crossover point. If the port does not work out there is a fairly easy way to correct it, but I'm interested to see how it sounds now, and if the box actually did achieve its target tuning of 31-32 hz.