Hey guys,
I bought a Bazooka Amp (1500series, 300x1 4ohms, 500x1 2ohms) off ebay for a total of $65. It will probably be replaced when i get spare money and really feel like it, or if its complete crap.

anyway, im looking to buy (2) infinity refrence 10" subs. They recommend .75cu ft. of air. how should i calculate this? I want both subs in one box and i plan to make it outta a sheet of High Density Partical Board from home depot. Can someone tell me some specs I should use? do i measure the boards as part of that .75 cu.ft. or not? is it safe to go over or under the suggested ammount? i want a good crisp sub, im not looking to win any competitions just want more bass. currently I have:

Kenwood KDS-316s HeadUnit
Bazooka 1500 Sub
Infinity Refrence 6x9's
Infinity Refrence 6 1/2's
30 feet 8 gauge power
10 feet 12 gauge stereo
remote wire
RCA Cable

all i need now is to build the box and install the subs and terminal and carpet it, then just hook it all up and be happy. but any help would be greatly appreciated.

also i would like to keep this sub box kinda out of the way, so i was hoping to angle the rear panel down.
one last thing: the power to the amp. the bazooka has (4) 20amp fuses on it, what should i do for an inline fuse (like i see in the amp wiring kits) or do i even need one? thanks again guys

MrGone

 

regarding the box,
to figure out the size of the box, you just multiply the height x the width x the depth (all dimensions in inches). then the number you get from that is divided by 1728. that will give you cubic ft.

it is ok to go over or under the recommended size. usually with sealed boxes, the smaller you go the boomier the sound from the sub, and the larger you go the tighter the sub will play.

 

How did you get the number 1728? i couldnt figure it out.
I was doing the height x the width x the depth and then i would cube root it and then i would get big or just off numbers.

So I am reading the post correctly, if you make the box bigger, you get a cripser sound, if you make a smaller box, you get a bigger thump.

Also can you tell me about the inline fuse on power lines.

thanks, I gotta run, class starts
MrGone

 

Take a look at the fuses on your amp (they look like automotive fuses). They should have a number on them (20,30,etc) see what the amperage is, and how many are on the amp. For instance if you have two 20amp fuses then your inline fuse from the battery should be a 40amp fuse . . . two 30 amp fuses . . a 60amp inline fuse.

Hope this helps :-)

 

1728 = 12x12x12 = which is equal to one cubic foot. the bigger the box the better the sound quality (little less loud), the smaller the box the louder it gets (lower sound quality, thump)

 

thanks for the help so far.
when measuring, should i use the area that will actually be "holding" the air, or the outside of the box, basically if im using 3/4" boards, do i count the 3/4" as part of the air space?

also my amp has (4) 20amp fuses. I take it that I need one 80amp fuse (im assuming that putting (4) 20 amps on the power line wont work to hold 80 amps). What does putting an inline fuse protect against? I just like to know what im doing, or what im doing it for. thanks again guys.

oh btw, i was in radio shack at lunch today, i bought a terminal that is sposed to cost $2.50 but its onsale for $.98 so i bought 2 made me happy because this is sposed to be a low cost project (as opposed to having cartoys or some other company install it)

thanks
MrGone

 

Don't make your box too big though, that will hurt your sub. I had that problem when my friend and I tried to build our own box, we just made it to big and killed 2 subs. Make sure you do everything right, a good installation for a system is really important if you want it to sound half way decent.

 

measure the inside volume of the box, not the outside. so don't include the 3/4 all around.

and about the box being too big, i'm sure if you build one that's like 1 cubic foot for each sub or less you should be fine.

 

thanks for the help and input.
just one more question... about the fuse, so i would need an 80 amp fuse? what does it do to keep a fuse on the power line if there are already 4 of them in the amp?
also any tricks on wiring the power through the firewall (3rd Gen), im having a hell of a time
thanks
MrGone

 

the point of the fuse is to protect the car's electrical system, while the fuses on the amp protect the amp. make sure your inline fuse, the 80, is within 18" of the battery, you probably knew that, but i just wanted to make sure cause that's for safety.

 

actually i didnt know that
i was going to put the fuses in the trunk because if they blew it seemed like an easy place to replace them. i think that i am going to wire the power through the front quarter panel, its where all the other wires are going.

MrGone

 

ok guys, how did you wire your amps power?
I have the signals wired up and ready to go, theyre on the right side of the car (passanger). now I just need to get the power and remote through. remote is easy, but I cant get the power through the firewall. I dont want to drill a hole. its 8 gauge wire thats about 1/4". someone said go through the hood release grommet, it seems like its possiable but its not working to well. I cant get it trought. I want it to follow the rest of the wires which I am almost 100% sure that they go through the drivers front fender.
how can i get it through and upto the battery. I have big hands but I may be able to get my mom or someone to do hard cramped parts.
Thank you
MrGone