Enclosure Suggestions for Two 18's.

[Zeltergiest]

I have two Zv4 18's freshly reconed and now I'm trying to do some research for the best possible enclosure that will suit my goals. In case it matters, Sundown tooled basket, NSV2 coil, Zv6 Spider. My main goal is to be able to play lows with authority and move as much air as possible. I've heard people say before tune low and a lot of port area but I need more specifics. Ideally, what would be the best tuning and how big of a box will the subs need to be efficient? I'm only considering a ported box design at the moment. If it's worth mentioning I'll be powering the subs with a Team Pie 7500.1 (Vital Power Clone)100ah Underground Power, 2 HO 300+ alts, all 0awg wiring throughout. Any advice or direction would be greatly appreciated, thanks! I'd like to achieve something similar to this.

Edit: I found this design online, would an enclosure like this be a good place to start?

Click to read more...

 

[HondaCRV03]

@Buck

 

[Ridinhi 5,000+ posts]

@Buck

Don’t think he is able to do designs at the moment. I’m needing help with a design myself.

 

[Boominburban 10+ year member]

That enclosure is only giving you 5.25 cu.ft. net per sub. I don't think that will be enough for the 18's you have. They probably have quite a bit more VD than the sq subs the box was designed for. I'm betting your subs will probably want 6.5+ cubes each. You really need to pull TS parameters ....

 

[Zeltergiest]

That enclosure is only giving you 5.25 cu.ft. net per sub. I don't think that will be enough for the 18's you have. They probably have quite a bit more VD than the sq subs the box was designed for. I'm betting your subs will probably want 6.5+ cubes each. You really need to pull TS parameters ....

• Fms: 27.4 Hz
• Res: 135.5 Ohm
• Qms: 5.39
• Qes: 0.60
• Qts: 0.54
• Rms: 15.0 kg/s
• Cms: 0.07 mm/N
• Mms: 469.7 gr
• Nref: 0.45 %
• Bt: 22.1 N/A
• SPL: 88.6 dB
• VAS: 136.2 L
• Rp: 33.7 Ohm
• Lp: 35.4 mH
• Cp: 1152.6 uF
• Le: 2.29 mH
• Recommended Ported Enclosure Size: 7.00 Ft^3
• Recommended Tuning: 32 hz
• Recommended Port Area: 112 in^2

The basics that Sundown Provides.

 

[HondaCRV03]

Don’t think he is able to do designs at the moment. I’m needing help with a design myself.

You're right. Hell if the design he made for my 18s works, I say he should send that over

 

[Zeltergiest]

@Buck

I've seen this guy many times on various post. Should I try contacting him directly? I assume he designs boxes right?

 

[Zeltergiest]

You're right. Hell if the design he made for my 18s works, I say he should send that over

What 18's do you have?

 

[Buck 5,000+ posts]

I would probably do 13-14 cubes net with a large square or slot port. Those subs are gonna probably move a ton of air and need more port than you’ll maybe want to try to fit with aeros. The box needs to be very strong, too, with how big each panel is going to be and the power levels you’re at. Idk how low you want to play, but usually something like 28-30 hz tuning plays pretty low while still being relatively balanced. Idk the t/s or recommendations on those, but you might need more like 14 cubes net with ~14-16in^2/cube of port area, if Sundown follows the model they’ve had for a while with their sub designs. You might just want to ask Sundown what they recommend or at least see how similar the zv6 is to the zv5.

 

[Buck 5,000+ posts]

I've seen this guy many times on various post. Should I try contacting him directly? I assume he designs boxes right?

I am not currently designing.

 

[Zeltergiest]

I would probably do 13-14 cubes net with a large square or slot port. Those subs are gonna probably move a ton of air and need more port than you’ll maybe want to try to fit with aeros. The box needs to be very strong, too, with how big each panel is going to be and the power levels you’re at. Idk how low you want to play, but usually something like 28-30 hz tuning plays pretty low while still being relatively balanced. Idk the t/s or recommendations on those, but you might need more like 14 cubes net with ~14-16in^2/cube of port area, if Sundown follows the model they’ve had for a while with their sub designs. You might just want to ask Sundown what they recommend or at least see how similar the zv6 is to the zv5.

THIS is a HUGE help. It's a good starting point of reference. Any Ideas when/if you'll be designing boxes again? Thanks for the reply. Greatly appreciated!

 

[HondaCRV03]

What 18's do you have?

Fi team 18s v3

 

[Buck 5,000+ posts]

THIS is a HUGE help. It's a good starting point of reference. Any Ideas when/if you'll be designing boxes again? Thanks for the reply. Greatly appreciated!

Idk if I’ll be able to or not; it probably won’t be anytime soon, at all.

 

[SlugButter]

This is one beautiful subwoofer. The recommended 7 cubes tuned to 32 HZ per sub from sundown would definitely be adequate. If these were my subs, and I had around 18 cubes of space to use, I’d do 7.25 cubes per sub tuned to 30 HZ with 16-18 sq. Inches of port per cube. Brace it as if its a bomb shelter and give it a triple baffle. Maybe even consider using 1 - 1.25 inch thick walls all the way around.

 

[HondaCRV03]

@SlugButter , you also design too? Or you're more of a builder?

 

[SlugButter]

@SlugButter , you also design too? Or you're more of a builder?

I’m a designer/builder. I still do my designs on graph paper and double/triple check everything as I build it. I should try to improve my digital learning so I can do professional blueprints. .

 

[HondaCRV03]

Sounds like OP should DM you

 

[mat3833 10+ year member]

Biggest thing here is make sure you have enough bracing. I'm currently running a single 18 @ 2500w on a 40x24 baffle, single layer, bolted to the 34"x20" oval trunk opening. Below about 35hz that baffle starts moving. Below 30hz, it's moving enough to be concerning. Any panel above 24x24 should be 1.5" thick or have internal bracing. Any panel over 30x30 should be 1.5" thick and have internal bracing.

My enclosure for the pair of 18's will be about 14 cubes net. It's a really odd shape and 4 of the sides are going to be against the car(rear, bottom, and the 2 large side panels). That leaves the top, the front, and the 2 smaller side panels. The top is going to be 2" thick, the front is going to be 1.5" thick, and the small side panels are going to be .75" thick since they arr only 22"x8". The other panels are going to be either bolted to the car or in the case of the large side panels, wedged between expanding foam and squished by the rear doors.

My subs have very low moving mass, only about 230g. I bet those Z subs are close to double that. That translates into alot of energy transfer into the panel in addition to the air pressure forces.

Matt

 

[Bobbytwonames 5,000+ posts]

@SlugButter , you also design too? Or you're more of a builder?

He's more of the criminal type with a lot of time to draw.

 

[djdilliodon!]

Once you start Frankensteining subs the TS specs will change from what is published. What it’s been rebuilt with will work tho in 7-7.5 cubes each. A ZV6 is a 4 layer spider so it’s pretty stiff and the surrounds on the larger rolls are also thick. Youll need those cubes if you want that low end.