Brahma Box Building

[DNIndustry 10+ year member]

I am ordering a 15" brahma, I am trying to design my enclosure.

I have ample space available in my 1996 blazer.

It is going to be 2.5 FT^3 sealed. with a 1200.1. I believe that this is what Dan Wiggins reccomends. is this including displacement or not?

What is the 15" displacement

As far as facing in an SUV. How should I position it?

Facing the Tailgate

Facing up @ 90 degrees

or Can I angle it at 45 towards the back ( does this make sense?) This is how I would like to do it if it wont change the sound from it.

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Kind of like this?

Eventually I would Like to get 2 of them and run a 1200.1 on each. If I some how get an extra 1200.1 before the other sub....I could run one amp per voice coil correct?

Mainly just for show but even both @ 3/4 power the driver could handle it for a while right?

Click to read more...

 

[DNIndustry 10+ year member]

SOrry my drawing got messed in posting..

 

[Mark_ab 5,000+ posts]

The box you have would have a slightly higher peak because it will have a marginally higher qtc than optimally flat (0.707). The peak would be even greater if that was 2.5 ft before displacement of the subwoofer (which is about .2).

 

[DNIndustry 10+ year member]

So you recommend 2.74? Would that still be tight? ( I am just learning QTC factoring)

 

[bumpin_blazer 5,000+ posts]

oh and if you think you can run a jbl1200.1 to each voice coil then your gonna be without a brahma. 2400watts rms to that sub will pop it like you wouldn't believe.

adam

 

[Mark_ab 5,000+ posts]

Originally posted by bumpin_blazer oh and if you think you can run a jbl1200.1 to each voice coil then your gonna be without a brahma. 2400watts rms to that sub will pop it like you wouldn't believe.

 

adam

Agreed. In daily driving for a Brahma, I doubt 99% of everyone would need more than 600W RMS.

 

[Mark_ab 5,000+ posts]

Originally posted by DNIndustry So you recommend 2.74? Would that still be tight? ( I am just learning QTC factoring)

2.8^3ft (after displacement) would yeild an optimally flat Qtc (0.707).