3 8 inch Subwoofer enclosure!! Hlp please?

[David.lee 10+ year member]

Hey guys I just purchased 3 infinity Reference 860w 8inch subwoofers. I want to do build this box by my self so i need help! this is my first build so i would appreciate help. Would you guys go sealed or vented? Also, could you help me build it? i have winisd and i have the specifications entered but i don't know what to do from there. I would appreciate all help thank you! Here are some specs and a link to the manual.

Car is Its a 2004 honda civic coupe, i have a lanzar opti2000d. Trunk space i want to work with is 36(w)x 14(h)x 32(l) max.

http://us.akg.com/tl_files/catalog//Infinity/Infinity-Car/Specsheets/Reference/Reference/860w/860W_PI_EN.pdf

THIELE-SMALL PARAMETERS

VOICE COIL DC RESISTANCE: REVC (OHMS) . . . . . . 3.30

VOICE COIL INDUCTANCE@ 1 KHZ: LEVC (MH) . . . . . . . 2.31

DRIVER RADIATING AREA: SD (IN2) . . . . . . . . 33.17

SD (M2) . . . . . . . 214.00

MOTOR FORCE FACTOR: BL ™ . . . . . . . . 12.56

COMPLIANCE VOLUME: VAS (FT3) . . . . . . . . 0.54

VAS (LITERS) . . . . . 15.23

SUSPENSION COMPLIANCE: CMS (µM/N) . . . . 232.70

MOVINGMASS, AIR LOAD: M MS(GRAMS). . . . 124.20

MOVINGMASS, DIAPHRAGM: MMD (GRAMS) . . . 122.40

FREE-AIR RESONANCE: FS (HZ) . . . . . . . . 29.60

MECHANICAL Q: QMS . . . . . . . . . . . 6.10

ELECTRICAL Q: QES. . . . . . . . . . . 0.483

TOTAL Q: QTS . . . . . . . . . . . . 0.45

MAGNETIC-GAP HEIGHT: HAG (IN) . . . . . . . . .0.315

HAG (MM) . . . . . . . . 8.00

VOICE COIL HEIGHT: HVC (IN) .. . . . . . . . . 1.34

HVC (MM) . . . . . . . . . . . 34

MAXIMUM EXCURSION: XMAX (IN) . . . . . . . 0.513

XMAX (MM) . . . . . . 13.00

Click to read more...

 

[brian502]

Vehicle? Dimensions of trunk?

 

[David.lee 10+ year member]

Im sorry i should have mentioned that! Ill edit the info in... Its a 2004 honda civic coupe, i have a lanzar opti2000d. Trunk space i want to work with is 36(w)x 14(h)x 32(l) max. Thanks for the reply brian! Much appreciated.

 

[brian502]

no worries. being that those subs are SVC, i would definetly go with a sealed box. just sitting here playing with some numbers, 28x10x7 will get u to around 1.13cuft before displacement. those subs call for .35cuft per. hope this helps or atleast gives u starting point.

 

[ThatChevyGuy 5,000+ posts]

no worries. being that those subs are SVC, i would definetly go with a sealed box.

Explain?

 

[brian502]

david said he was sry for not metioning the vehicle and trunk dimensions, so i replied no worries

SVC= single voice coil on the sub. i would not recommend porting svc coil.

 

[soundstreamer 10+ year member]

i would not recommend porting svc coil.

Explain?

 

[David.lee 10+ year member]

Thank you brian! ill deffinatlly use that as one of my templates! And Guys, Does anybody else not recommend porting this box? Ive seen a few people port it and it sounds very good! they say it has Sq and its pretty loud for 8s. Another question is people also recommenced giving each 8 about .8-1 ft each, will this be a bad idea from users who have tried this? Last question is if i do go sealed, would going over the .35 recommended box size for each sub effect sq? Sorry for all of the questions and do really do appreciate you guys at the site.

 

[globalminds_ent 10+ year member]

What does svc have to do with going ported or sealed? R

 

[DB-Audio 10+ year member]

What does svc have to do with going ported or sealed? R

exactly what I was wondering I always thought it had to do with the fs and xmax

 

[brian502]

I've always sealed svc subs and ported dvc subs. It's just ones opinion, and had no problem doing it this way. Apparently u guys have and there's nothing wrong with that either, if it worked.

 

[1stgen]

the coils have nothing to do with ported or sealed.

you should go ported, .75ft each so 2.25 NET with a 4" aero port or 18-22 sq inches port area slot port

 

[David.lee 10+ year member]

I think i may end up going the ported way, it should still have the SQ, itll be louder, and will hopefully hit some lower freqs. Ive seen the aero ports everywhere and think i may use it on this build! Does anybody elese think 1stgen's idea "ported... .75 each... 2.25 NET... with a 4" aero" will be a good box for these subs? again thanks to you all.

 

[DB-Audio 10+ year member]

I've always sealed svc subs and ported dvc subs. It's just ones opinion, and had no problem doing it this way. Apparently u guys have and there's nothing wrong with that either, if it worked.

your way is not necessarily wrong but dont think its because of the coils more of a personal preference

 

[David.lee 10+ year member]

https://drive.google.com/file/d/0B4btaowumBJFVjJpYUtmcnlYenc/edit?usp=sharing

https://drive.google.com/file/d/0B4btaowumBJFSzZlbVlHOUkzRU0/edit?usp=sharing

WOuld this be a decent basic box for these three subs? thanks again guys