VW Caddy for SPL from Ukraine !


Bratishev_Artem

CarAudio.com Newbie
Sep 3, 2021
16
13
Ukraine
Hi, i'm from Ukraine and my english so-so....
but I want to share my project that we are doing by our AAC team, I would like to hear your comments.
The first stage of work is the dismantling of the entire cabin, the removal of the old Soundproofing, which is not suitable for our tasks. Along with this, the removal of the bumpers will be replaced, the car will not only be interesting inside but also outside.
 

Attachments

  • Like
Reactions: Popwarhomie

Bratishev_Artem

CarAudio.com Newbie
Sep 3, 2021
16
13
Ukraine
  • Thread Starter Thread Starter
  • #2
In the car, the design was chosen BP-4. 4th order bandpass.
What is BP4 - one side of the speaker is closed in a sealed volume, the other side plays into the camera - after the camera is a port.
Despite the fact that there will be a cage in the caddy, the whole machine is subject to the terrible influence of parasitic resonances, so all the panels to which it will be difficult to get to after welding - we use the best material for these purposes.
STP Massa Bassa is a sandwich of polymer (mastic) and bitumen layer. EATH, the material works both as additional stiffness and quenching due to viscosity. + layer of aluminum foil. It is difficult to work with it, the application of the material implies heating the material and the knowledge of the installer (what to do with it) and labor-intensive rolling, but efficiency is above all! the effectiveness of the material, especially after a day, is above all praise
We rolled it up where we saw a need for it, let's go for the metal!
PURCHASED:
Profile 30 * 40, thickness 2mm + I-beams and a huge amount of cutting wheels, wires for welding, consumables and other trifles ...
After that, we invite a "welding engineer" for a consultation on rigidity and a discussion of the importance of applying knowledge from strength materials .....
 

Attachments

  • Like
Reactions: metalheadjoe

Bratishev_Artem

CarAudio.com Newbie
Sep 3, 2021
16
13
Ukraine
  • Thread Starter Thread Starter
  • #3
work has begun on the back wall .... special attention to it, it will be part of our closed box, the load on which will be very large. We overlap the frame to achieve maximum rigidity ...
A picture of understanding the exact volume of the camera is already emerging.

Simultaneously with the welding, they began to prepare the power wiring, or rather the connection between the generators and the battery. And they will be connected by 8 cable broaches of 50 squares, 4 on + and, accordingly, 4 broaches on "-". The entire cable (Audiobeat) is hidden in a protective braid and is being prepared for installation ...
 

Attachments

  • Like
Reactions: metalheadjoe

Bratishev_Artem

CarAudio.com Newbie
Sep 3, 2021
16
13
Ukraine
  • Thread Starter Thread Starter
  • #5
The ceiling, an important part .... vibration isolation even in 10 layers does not solve the problem .... so we work radically. Frame, metal bonding, plywood stitching ...

This work took a full two days to understand, to bend and weld the metal in three planes for the largest possible contact area with the ceiling.
 

Attachments

  • Like
Reactions: metalheadjoe

Bratishev_Artem

CarAudio.com Newbie
Sep 3, 2021
16
13
Ukraine
  • Thread Starter Thread Starter
  • #6
Port - will be located behind the driver, one of the most vibro-loaded parts will be the right front quarter and in particular the floor. Therefore, not without easy paths, we make a frame on the floor, a frame, squatting at the control points. Next, fill all cavities with resin with crumbs and a little secret recipe, for maximum rigidity and exclusion of all air cavities. Then we cover all this with 24 plywood and carefully tie everything together while shedding all the cracks and joints. After we get the effect of a "marble slab" knocking, and it is like "peas against the wall" ....
 

Attachments

  • Like
Reactions: metalheadjoe

Popwarhomie

Team Lethal Pressure
5,000+ posts
10+ year member
Jan 22, 2010
10,020
2,232
FL
  • Like
Reactions: ThxOne

Bratishev_Artem

CarAudio.com Newbie
Sep 3, 2021
16
13
Ukraine
  • Thread Starter Thread Starter
  • #10
The power reserve is always only a plus, the larger the capacity of the batteries - the better, and the generators that will power them - must be appropriate. Therefore, two AZ13 generators - 370A each - are exactly what will suit us.
the batteries themselves are an interesting solution, these are the batteries from the leaf car. Lithium manganate
total capacity about 700A
 

Attachments

  • Like
Reactions: metalheadjoe

Bratishev_Artem

CarAudio.com Newbie
Sep 3, 2021
16
13
Ukraine
  • Thread Starter Thread Starter
  • #11
rigidity, rigidity, rigidity .... the wall on which the subwoofers are mounted. plywood - 4 layers, + metal base on hairpins connected to the back wall. for 12 subwoofers about 170 liters of closed volume.
 

Attachments

Bratishev_Artem

CarAudio.com Newbie
Sep 3, 2021
16
13
Ukraine
  • Thread Starter Thread Starter
  • #12
further, a very long, difficult stage. Make all the walls as smooth as possible ... all the corners are rounded, later there will be tests with smoke, where we will see where the air flows are laminar or turbulent.
 

Attachments

  • Like
Reactions: metalheadjoe

Bratishev_Artem

CarAudio.com Newbie
Sep 3, 2021
16
13
Ukraine
  • Thread Starter Thread Starter
  • #13
the exit of the load wall should be rounded, this is taught at school))) Moreover, in the process we will have to play with the port, so we make it removable.
You are interested ? should I continue?)) And again, sorry for the bad English
 

Attachments

  • Like
Reactions: nags

hispls

CarAudio.com Veteran
5,000+ posts
10+ year member
Sep 10, 2009
12,065
740
Central Maine
This is a serious SPL build here. Thank you for sharing and please continue with the pictures.

Yes, the translation seems a little strange but we can understand your meaning.
 

Popwarhomie

Team Lethal Pressure
5,000+ posts
10+ year member
Jan 22, 2010
10,020
2,232
FL
That woofer placement is killing me. :oops:
 
  • Like
Reactions: nags

audiobaun

CarAudio.com Veteran
5,000+ posts
10+ year member
Jun 28, 2011
10,886
353
USA
Talking about one heavy azzed vehicle??? I hope that suspension will hold up. Deff not going to do well on the road. Flat bed vehicle. Awesome build concept. Very Interesting, and alot of work involved
 

Bratishev_Artem

CarAudio.com Newbie
Sep 3, 2021
16
13
Ukraine
  • Thread Starter Thread Starter
  • #20
So what's going on behind the car. Power supply lithium manganate, all connected by copper strips. All these subwoofers will be powered by two amplifiers. The power of each amplifier is 28K = 28000Watt nominal (1Ohm). As a result, we get about 56K at the output, taking into account that our connection to each amplifier will be 0.35Ohm - we, even taking into account the growth of impedance, have excellent power.
 

Attachments

  • Like
  • Wow
Reactions: nags and audiobaun

Create an account or login to comment

You must be a member in order to leave a comment

Create account

Create an account on our community. It's easy!

Log in

Already have an account? Log in here.


Users Who Are Viewing This Thread (Users: 4, Guests: 15)

  • nags
  • sherwood71
  • B


Latest posts

Newest threads

Most posts - Past 30 days

Latest classifieds