box for 3 MM840

g-mang-man Posts: 46
edited June 2010 in Car Subwoofer Talk
Hi

Planing on building an SQ system in my BMW 330Ci and thought of 3 MM840's.

I want all three woofers to play in one box.
Polk states 0.3 c.ft per woofer,but to my knowledge the total volume will be smaller if all three plays in the same enclosure.

Anyone know how big the box should be?

I'm thinking that 0.7 c.ft will be good..for some odd reason.:)

Cheers.
Stereo:
Speakers:Polk SDA-1A
cd/dvd:Marantz DV6200(HDCD)
Amp: DUAL Audiophile Concept. (1992)

ICE:
Alpine CDA9887R
Audison LRX 1.1K
Audison LRX 4.5
Amega Q-Comp50
Amega Q-Comp60
Sub: Focal Utopia WX21 BE
Sub:? maybe 3 MM840.
Stinger HPI signal,power,speaker cables
Post edited by g-man on

Comments

  • Mahna MahnaMahna Mahna Posts: 14
    edited June 2010
    Why do you want to put all the subs in a common box compared to individual boxes?
    If you come to Canada, remember our bears like no foam lattes......thank you :D
  • TopperTopper Posts: 403
    edited June 2010
    sorry nothing to contribute regarding the box sizes but came across this pic of 8s in a BMW as well and thought i'd post it to give you install ideas:

    26750_359809173391_90526453391_3723749_3247962_n.jpg

    26750_359809193391_90526453391_3723751_2955505_n.jpg
  • Installer4lifeInstaller4life Posts: 256
    edited June 2010
    If you for each subwoofer then you will need .9 for all three in a common enclosure. As long as you are running one mono amp on all woofers then one enclosure will work as well as three seperate enclosures. Personally in a BMW I would go larger unless the subs will fire directly into the cabin with no restrictions.
  • g-mang-man Posts: 46
    edited June 2010
    thank you.
    Stereo:
    Speakers:Polk SDA-1A
    cd/dvd:Marantz DV6200(HDCD)
    Amp: DUAL Audiophile Concept. (1992)

    ICE:
    Alpine CDA9887R
    Audison LRX 1.1K
    Audison LRX 4.5
    Amega Q-Comp50
    Amega Q-Comp60
    Sub: Focal Utopia WX21 BE
    Sub:? maybe 3 MM840.
    Stinger HPI signal,power,speaker cables
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