First let me say I know these subs are junk, but I need to build a box for a pair of 12" Xpods. Is there any one out there who knows how much air they need for a sealed or vented box. All I can find on the internet are basic specs but no box sizes.

I can't help you with the box building part of it, but if you get the proper box and don't abuse them, I think you'll be pleasantly surprised as to how good they "can" actually sound.

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You need to be more specific on the model. It should be on the magnet. But sealed for 12" xplods 1-1.25 cu.ft per subwoofer and ported 1.35-1.75 tuned per to 37hz

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L0W T0N3Z AUDIO

NORTHERN AUTO SOUND

The model number is xs-l121p5. It is one of the older red ones.

There is nothing but basic info on them. The only thing i can suggest is email there tech support and see if they can get you the parameters. But as i stated earlier you will be fine with 1-1.25 cu.ft sealed and 1.35-1.75 cu.ft. tuned to 37 hz after sub and port displacement.

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L0W T0N3Z AUDIO

NORTHERN AUTO SOUND

Thanks I will try a 1.25 box I have in the shop and see how it sounds.

they say ported at 1.67cubic ft tuned at 34hz sooo the port style is up to you .. square, slot/ L port, round port ( flush or flared)

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02 GRAND CARAVAN SPORT

SPEAKERS: -6 1/2" component from energy still to come concidering alternatives
-2x Massive audio CW12 in 4.2cf dual chamber square ported at ~35hz

Amps: -DD SS1
-KAC-745

Upgrades: -160 amp alt. maybe
-4 gauge wiring (done)
-0 gauge BIG 3 (done)
-sound deadning the shit out of the van somewhat not done yet
?????????

ohh and um

Max Power (W): 1200
Max Power (RMS, W): 350
Sensitivity (dB/W/m): 89
Freq. Resp.: (Hz) 18 - 2k
Impedance (Ohms): 4
D (mm): 250
D (inch): 9.8
Rdc (Ohms): 3.2
Fs (Hz): 26.4
Qts: 0.42
Qes: 0.44
Qms: 5.86
Vas (Lit.) : 55.5
Vas (ft_): 1.96
Mms (g) : 219.0
Lvc (mH) : 1.2
Xmax (mm) : 7.5
Xmax (inch) : 0.3
BL (Tm) : 16.1

__________________
02 GRAND CARAVAN SPORT

SPEAKERS: -6 1/2" component from energy still to come concidering alternatives
-2x Massive audio CW12 in 4.2cf dual chamber square ported at ~35hz

Amps: -DD SS1
-KAC-745

Upgrades: -160 amp alt. maybe
-4 gauge wiring (done)
-0 gauge BIG 3 (done)
-sound deadning the shit out of the van somewhat not done yet
?????????