On the Adioformz Website, it shows their xb box with the sub firing down into it. Just wondering if anyone has this setup and if they see an advantage to downfiring?

 

One advantage to downfiring, depending on the distance between the speaker and the surface, is that the floor will act as a loading wall, making the box behave more like a ported box = louder.

 

So if i wanted to downfire the sub would i still need to port it?

 

If it was built properly, porting + downfiring = very odd

as long as you keep the sub 3~5" from the surface, it won't end up as a loading wall.

 

would u recamend doing a box like this for a Kicker solobaric L7 15"?

 

I think he's talking about inverting the sub, in which case there are very little advantages to....

like this: This is inverted mount, not downfiring

 

yep like my 2 downfiring subs under the seats.....

 

so there is no way i could down fire my L7?

 

I apologize - I did mean the inverted set up.

 

of course you can... all downfiring means is that the sub cone is facing the floor and the enclosure has something too hold the sub up off of the floor, such as a lip or spikes...

Just like rear-firing is with the subs facing the rear of the vehicle and foward firing is with the subs facing the front of the vehicle....

 

Mounting subs inverted effectively increases the volume of the enclosure.The magnet, frame, and voicecoil no longer take up enclosure space, while the volume inside the cone adds to enclosure volume... Not very practical in other respects, though, particularly because of exposed wiring and probable phase reversal...

 

^^^ very true, but in most cases the amount of airspace that is gained is practically negligible...

 

ok , Thanks everyone for your help!

 

here's my inverted set up... still need the amps tuned tho... it should hit so much harder/louder/cleaner i think than it does now.... just dunno how.. i can wire things.. but not tune them

 

Ok i have a similar question, i'll try to explain this clearly...

I have 2 12s in seperate sealed boxes in a tC. When both subs are in phase (hitting outward from the magnet) no bass is produced. But when they are 180 degrees out of phase (1 hitting inward towards the magnet, and one hitting outward away from the magnet) they pound like hell. Would it be ok to flip the 1 sub around (magnet on the outside of the box) and change the polarity of it so that they both hit outwards from the magnet.

Please ask, if you need clarification. I already asked on another thread and all i got was "you hooked it up wrong" and "thats impossible". Please, i know how to wire amps and subs. Im just not familia with the capabilities of subs. Hitting positive or negative, and inside box or outside box, and so on. Any help is much appreciated!

 

tCizzler,

Are you ABSOLUTELY sure that they are moving in opposite directions? Because that would cause no sound.

If you could, do me a favor.

Get a 9V battery. Test it on one box, + on the battery to + on the terminal, - on the battery to - on the terminal. See which way the sub moves.

Do the same on the other sub, + to + and - to -. I'm betting they move in opposite directions.

More than likely it's a simple error on the back side of the terminal in one box

 

Ok i truely am thankful for your attempt to help me, but thats what im talking about (what i said in my first quote). People keep doubting my setup, everything is setup properly and i have tested it fully because i was confused also. Nothing is wrong in the setup of the amp or wiring. I did the battery trick and it is actually obvious just by watching them. If you get a song with enough bass, you can see the speakers moving and they only work when they are hitting opposite ways. I wish i knew someone that lived closer to maybe see if they could look at it with me.

My real question is... Can i just turn around one of the speakers, or will it hurt anything?...Speaker life, box integrity, etc.

Thanks again mandos, i'm not being sh1tty or anything, but i have checked rechecked and then double rechecked the wiring. And even done battery testing.
I have heard from some people that it could be the way the HU is setup or something, but it still doesn't make sense to me. But like i said im not real worried about that right now, im just wondering if i can turn my speaker around in the box.

 

Yeah, turning it around in the box = not an issue, as long as you can mount it w/o the surround hitting the edge of the hole

I really wish I could help you, but the only time I wired 2 speakers so they moved in opposite directions, I got no sound at all

 

My .02...
Dual VC subs, coils wired incorrectly. Or single VC subs-one is blown? Grasping at straws here.

Battery test would also rule out a sub incorrectly wired/marked @ the factory.

 

Thanks!

I know what you mean... every other system i've ever had was different. This is the only one that needed this setup. At first i thought maybe it was because of it being a hatchback, or maybe because i had 2 seperate boxes, but after asking some questions, i ruled those possibilities out.