15' mayhems surface and volumes

[keddy_net 0]

Hello guys

 

I have:

 

VW Golf 4 hatchback car

2 x AA Mayhem 15' D1

Skar Audio sk 4500.1d

2 x Crescendo F31-Hp

Stock alternator 120A

 

 

I need advice:

 

Daily box

Wired to 0.7

Tuning 32hz

What surface area of port ?

What internal volume ?

 

Spl box:

Wired to 0.25

Car peak around 50Hz

tuning box 47 Hz

what internal volume ?

what surface area ?

 

I need this volumes and surface area from users who play with mayhems or similar subs like n2, n3, zcons etc.

 

Thank You

Michael

Edited May 24, 2014 by keddy

[Shogen 325]

Whaaaaaaaaa

[gprestonmoto 89]

ROFL. WTF is this?

[Shogen 325]

First.. What size mayhem, how much space do you have??

[keddy_net 0]

2 x AA Mayhem 15' D1.

 

The maxim internal brut volume for this subs is arround 7.5 cu ft.

 

Now I have a box tuned to 37Hz with 39.4 x 23.8 x 20.1(inch) external dimensions

But i want to make two box, one for daily one for spl.

Edited May 24, 2014 by keddy

[Shogen 325]

Ooooooo I missed that in the title. My bad. Alton is your man, hopefully he sees this

[jcarter1885 995]

Why not build one box with interchangeable ports so you can have a daily tune when you want it and a spl tune when you are competing?

[95Honda 486]

I installed that exact driver with a Cresendo 3500.1 (4Kw roughly) last year.  I ended up with 4ft3 and roughly 70in2 of vent area @30Hz, IIRC.  Works fantastic.  Honestly though, there is no rule of thumb for vent area.  You need to model with your alignment and power to see if you will have compression issues.

[keddy_net 0]

I start working on this box.

 

it will be with two 8' PVC interchangeable round and flared ports.

 

For daily the box will have 7.6 cubic feet, 2 x 8' flared round ports, 32Hz with 27' depth and 97.4 sq inch area

For SPL the box will have 8.2 cubic feet, 2 x 8' flared round ports. I will start from 42Hz tuning to find the car peak freq

Edited May 28, 2014 by keddy