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Ported box for 2 Alpine Type R 12's (1242D) Are these plans good?


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I've got 2 12" Alpine R's. I prefer SQ, but these aren't really SQ subs, and everyone has recommended porting them. I would like to put them in a ported box, or two separate boxes if this is better. I listen to lots of metal, house, and dubstep, so lots of fast beats and some rapidly oscillating bass lines. I want to hear each note and want it to be clean, rather than pure SPL. I'm thinking of using a small volume and low tuning (in the high 20's). This will be in the trunk of an 05 altima. This link is to box plans for this sub. Can anyone verify if these plans are for 1242D type R's? Are the plans any good? any suggestions or plans are appreciated. here is the link: www.caraudio.com/forums/enclosure-design-construction-help/137804-free-box-plans.html

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u want more 30 to 40 hz for that kinda music

01 focus se

110 amp alt

Big 3 sky high and stinger hpm ofc 1/0

Super start platinum AGM (starting)

2 runs of 1/0 Execution audio front to back

Kenwood double DIN DDx271

A pillars- orion 4" super tweeter and 2-1" alpines.

Orion xtx 64 in the front doors

2:1 4th order bandpass

Sealed off trunk

Digital designs deadener on roof/ rear deck

Orion hcca 12s (black coils)

Orion xtr3700.1

Orion xtr250.2 mid/highs

All sky high 1/0 in trunk dual runs(power/ground)

Sky high dual 1/0 inputs

2 xs power D3100 in back

Sky high batt blocks

Rose audio batt blocks

Stinger volt meter

All sky high 1\0 fuse and holders

Db link remote/ rca

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why would the 20's be too low? not being a smart-ass, just curious. does much music have notes that low?

Home theater boxes are usually tuned that low because action movies often produce really deep rumbles that drop down into the 20's, sometimes even inaudibly low.

Music, however, doesn't drop below 30 very often. Unless you're listening to Chopped and Screwed/Slowed music a lot, tuning that low will hurt a lot of your upper end output. Regular music won't be as loud as it could be, and potentially could sound weird.

You can play frequencies below tuning

Just say no to Ground Pounder Customs.

More box builds

some cars do over 170db with one sub, so clearly my two 12"s can do that in my car, with my knowledge too! look out bitches!

I'm with captain stupid.

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33-35 is my preferred range. I'm kind of ocd about it and i have no idea why. 32 should be fine though.

Just say no to Ground Pounder Customs.

More box builds

some cars do over 170db with one sub, so clearly my two 12"s can do that in my car, with my knowledge too! look out bitches!

I'm with captain stupid.

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Ah I see. That makes sense. I will probably tune it around 32 then, unless this is still low.

i would do a 38hz

01 focus se

110 amp alt

Big 3 sky high and stinger hpm ofc 1/0

Super start platinum AGM (starting)

2 runs of 1/0 Execution audio front to back

Kenwood double DIN DDx271

A pillars- orion 4" super tweeter and 2-1" alpines.

Orion xtx 64 in the front doors

2:1 4th order bandpass

Sealed off trunk

Digital designs deadener on roof/ rear deck

Orion hcca 12s (black coils)

Orion xtr3700.1

Orion xtr250.2 mid/highs

All sky high 1/0 in trunk dual runs(power/ground)

Sky high dual 1/0 inputs

2 xs power D3100 in back

Sky high batt blocks

Rose audio batt blocks

Stinger volt meter

All sky high 1\0 fuse and holders

Db link remote/ rca

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Share on other sites

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