Featured 2 12's in a 2018 Mustang GT.

[Airflow_Concepts]

2 12" Cerwin Vega VMAX Subwoofers. Dual 2 ohm.

1x Orion XTR 2500.1DZ

1x Energie PR 2400 Power Cell

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[1aespinoza 10+ year member]

1x Orion XTR 2500.1DZ

So those are the guts that put out up to 5kW. I have not given Cerwin Vega a looksie in quite a while but those subs look like they could do some damage.

 

[Deiimos]

The CV subs look decent enough for the price, 3” coil, should have some pretty good output. I really haven’t looked up a Cerwin Vega in a long time myself.

 

[mahc 10+ year member]

That sealed box is huuuuge. More efficient than a compact one I guess. Impressive subs from CV for sure.

 

[Airflow_Concepts]

That sealed box is huuuuge. More efficient than a compact one I guess. Impressive subs from CV for sure.p

That sealed box is huuuuge. More efficient than a compact one I guess. Impressive subs from CV for sure.

Yeah the sealed chambers are 1.68 cubes each before sub displacement, after sub displacement each chamber should be roughly 1.5 cubes. The box will be externally ported and tuned to around 32. Should be able to cap off the ports and use the enclosure both sealed or ported. So far on minimal power everything seems to be low and loud.

 

[munchy_cool 10+ year member]

nice ....can you please share the dimensions of the box?

 

[Airflow_Concepts]

nice ....can you please share the dimensions of the box?

-HEIGHT: 13 1/2”

-LENGTH: 33 1/4"

-DEPTH: 17 1/2”

 

[munchy_cool 10+ year member]

-HEIGHT: 13 1/2”

-LENGTH: 33 1/4"

-DEPTH: 17 1/2”

thanks

 

[Airflow_Concepts]

Ports are in, getting closer to putting some real power to The subs.

 

[1aespinoza 10+ year member]

Ports are in, getting closer to putting some real power to The subs.

Are the subs already broken in? If not, go easy on them or they will deconscripulate.

 

[shredder1 10+ year member]

Are the subs already broken in? If not, go easy on them or they will deconscripulate.

No way those 4" ports (12.56in2) are sufficient. On his power... even 2ohm? I advocate for 2x the port area but if using external Pvc watch for those plumbers problems like >150hz resonance that resonates <150hz. Make it solid.
Its a real thing with long external Pvc ports in my exp.

 

[Airflow_Concepts]

No way those 4" ports (12.56in2) are sufficient. On his power... even 2ohm? I advocate for 2x the port area but if using external Pvc watch for those plumbers problems like >150hz resonance that resonates <150hz. Make it solid.
Its a real thing with long external Pvc ports in my exp.

Yes the ports are external. Will not be chipping away at internal volume. Calibrating the amp should not allow any frequencies lower than 26 and above 80.

 

[1aespinoza 10+ year member]

On his power... even 2ohm? I advocate for 2x the port area

Is this per sub? Also, is the issue that the smaller port area will raise the resonant frquency of the box?

 

[Airflow_Concepts]

Enclosure and subs are in the trunk. Gave them some power with low voltage and it gets rowdy.

 

[Airflow_Concepts]

With the car running and the starting battery paralleled to the Energie 2400 power cell voltage does not dip below 14. I can tell the amp wants to power the subs well beyond the rated power. I am still tweaking things with the amp to find the happy medium between music and heavy bass tracks. It's hard to tell, but I would shoot my shot at peak output seems to be between 31 and 36 Hertz. Tried running everything without the LPF switch which limits things to 25 Hertz, and definitely smelled a little heat. I backed things down and will test again with the LPF switch on. Never did the subs bottom out and definitely think that the amplifier played a big part in that with the quality components built in. As things stand Right now, I think on a meter the setup would come in around the 145 to 147 mark around 35 hz. Very impressed overall, as in comparison to my last setup which was two DC audio level 4 XL m2s on a DC 5K. Yes I still think the DC 5K was louder but not by much, since it was literally twice the power. Definitely think the XTR 2500 at 1 ohm would be incredibly loud and match or supersede what I thought at the time was the loudest system I ever had. Keep in mind this is a dirty signal from the factory HU with a kicker LOC which has performed phenomenally

 

[Airflow_Concepts]

No way those 4" ports (12.56in2) are sufficient. On his power... even 2ohm? I advocate for 2x the port area but if using external Pvc watch for those plumbers problems like >150hz resonance that resonates <150hz. Make it solid.
Its a real thing with long external Pvc ports in my exp.

So do you think adding another 4-in port to each chamber will increase the output.

 

[shredder1 10+ year member]

So do you think adding another 4-in port to each chamber will increase the output.

It would but certainly make those ports prohibitively long. Even turning the center chamber divider into a window brace and going with a single 6" is more port than dual 4"... Not much but some. Round ports at times make things difficult, with set port area it's hard to nail the best area for best output.

Right now your at about 8in2^ft3, it just depends on the power and subs capability

 

[Airflow_Concepts]

Okay added another 4-in port to each chamber and definitely suffered in output as far as volume and low frequency response. I do know that it is a slightly undersized recommended volume for each subwoofer. Definitely got a sniff of the coils after adding the second port to each chamber. It's literally a third louder and lower with just the one 4-in port at roughly 11 to 13 inches in length. I do know and understand that the ports need to be substantially longer when adding more port area, but at this point it seems like the enclosure volume is the inefficient factoring in the equation. Good news is that the subs do not seem to be mechanically maxed out but the ear test does acknowledge that adding more power at a certain point Just gets muddy and ineffective for output.

 

[Airflow_Concepts]

New Enclosure

 

[Airflow_Concepts]

Video of new setup.