Zv4 4th Order Specs

[ObTechAudio]

I'll soon be building a C-Pillar 4th order for (4) Zv4 12" Rev. 1s on (4) DD M3bs in an '08 Chevy Trailblazer. I've already decided on a 2:1 ratio, but I'm having trouble finding accurate info for my sealed section. Some have said 1.5 cubes per while others have said 1.25 cubes per.

So, I open it up to you guys to share your thoughts. On roughly 3-4k per sub, how much airspace would you give each sub on the sealed portion of the enclosure?

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[Buck 5,000+ posts]

Depends on how low you want to play

 

[Massive spl]

1.25cube per

 

[ObTechAudio]

Depends on how low you want to play

True... Looking for mid 20s to about 45-50... Needs low end demoing more than anything, but a solid number on the dash wouldn't hurt.

 

[Buck 5,000+ posts]

True... Looking for mid 20s to about 45-50... Needs low end demoing more than anything, but a solid number on the dash wouldn't hurt.

You'll always get a solid number on the dash if it's designed right.

 

[ObTechAudio]

You'll always get a solid number on the dash if it's designed right.

Very true, but like I said, demoing will be most important for this particular build. The overwhelming majority of music played will be in the 25-35hz range, with the most being 28-32hz.

 

[Popwarhomie 5,000+ posts]

My buddy had 4 ZV4 12s( SPL cone, surround, nightshade coils, Rev2) in a 4th blow through. Thing was nasty. Played from 15 to 50hz. Did a 157. Was a 3:1 though.

I can get some more specs from him if you like.

 

[ObTechAudio]

My buddy had 4 ZV4 12s( SPL cone, surround, nightshade coils, Rev2) in a 4th blow through. Thing was nasty. Played from 15 to 50hz. Did a 157. Was a 3:1 though.

I can get some more specs from him if you like.

I would very much appreciate that. I know it's a 3:1, but just seeing what he did would be a big help. Thank you x 100!

 

[Popwarhomie 5,000+ posts]

I would very much appreciate that. I know it's a 3:1, but just seeing what he did would be a big help. Thank you x 100!

He said do 1.25 sealed each.

 

[ObTechAudio]

He said do 1.25 sealed each.

Very helpful. Thanks again for reaching out!

 

[ObTechAudio]

He said do 1.25 sealed each.

I know his a beefy with SPL cones, nightshade coils, etc. The ones I'm working with are bone stock Rev 1s.... he still recommend 1.25 per?

 

[Popwarhomie 5,000+ posts]

I know his a beefy with SPL cones, nightshade coils, etc. The ones I'm working with are bone stock Rev 1s.... he still recommend 1.25 per?

Yes. His were in 1 each

 

[ObTechAudio]

Yes. His were in 1 each

Awesome... just wanted to check.

 

[ObTechAudio]

Yes. His were in 1 each

Do you have a youtube link or pics of his build?

 

[hispls 5,000+ posts]

Do you really think that .25 cube difference will be audible? IMO you're way over-thinking this and that variance will be about the least impact on final results.