What is the recommended air space for a sealed enclosure for the sdr18 -d2

When I built my box I searched sdr 18 specs. It pulls up skar website in search results. Click the link and you'll find that skar provides all enclosure specs on their website. Enclosed and ported.

I got this 18 2ohm and it comes wired at 1ohm I have a 1200w Sony xplod amp and it’s not 1ohm stable what should I do ?

Rewire it so the ohms go up to 4

Im looking to buy 4 of these 18 , needing specs for best ported encloser

Skar recommends 4.6 cubes each tuned at 32hz

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🎶 Feel the Beat, Own the Road!

UNLEASH THE BASS - Experience heart-thumping sound with a peak power of 1200 watts.
COOL UNDER PRESSURE - Advanced airflow cooling design keeps your subwoofer performing at its best.
SEAMLESS INTEGRATION - Compatible with various devices, making it the perfect addition to your car audio system.
BUILT FOR COMPETITION - High roll foam surround and pressed paper cone for ultimate durability.
PRECISION ENGINEERING - Crafted with a 2.5" 4-layer copper voice coil for superior performance.

The Skar Audio SDR-18 D2 is a powerful 18-inch dual 2-ohm car subwoofer designed to deliver an impressive 1200 watts of peak power and 600 watts of RMS power. With a frequency response range of 18 Hz to 250 Hz and a high-temperature copper voice coil, this subwoofer ensures deep, rich bass and exceptional sound quality. Its advanced airflow cooling design and durable construction make it a reliable choice for any car audio enthusiast.

Specifications

Power Source	Corded Electric
Speaker Maximum Output Power	1200 Watts
Compatible with Vehicle Type	Car
Compatible Devices	Smartphone, Tablet, MP3 Player, Desktop, Television, Projector, Laptop
Speaker Size	18 Inches
Woofer Diameter	18 Inches
MP3 player	No
Specific Uses For Product	car
Controller Type	Corded Electric
Color	Coil Configuration=Dual 2 Ohm
Is Waterproof	FALSE
Warranty Type	limited warranty
Control Method	Voice
Audio Output Mode	Surround
Mounting Type	Enclosure
Speaker Type	Subwoofer
Additional Features	Bass Boost
Recommended Uses For Product	car
Subwoofer Diameter	18 Inches
Item Weight	25.3 Pounds
Unit Count	1.0 Count
Impedance	2 Ohm
Signal-to-Noise Ratio	87.3 dB
Number of Audio Channels	2.0
Battery Charge Time	18 Hours
Subwoofer Connectivity Technology	Wired
Connectivity Technology	Wired
Audio Driver Size	18 Inches
Audio Driver Type	Dynamic Driver

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Skar Audio SDR-18 D2 18" 1200 Watt Max Power Dual 2 Ohm Car Subwoofer

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