Whats in the box:

• 1 x Bio 2.0 12" D4 Car Subwoofer (Dual 4 ohm)

Features:

1. It is a dual 4Ω (ohm) resistive (voice coil) subwoofer
2. This sub takes 250W (RMS) & can take up to 500W power (MAX)
3. Dual connectivity terminals with 2" (diameter) voice coil make this product versatile irrespective of its size, dimensions and power consumption
4. It incorporates Y30 graded ferrite magnet, which is one of the kings in the magnet world
5. Strong basket frame is capable of handling high powered audio frequencies without any harm to the product

Technical Specifications:

1. Sub power: 250W (RMS) | 500W (MAX) 
2. Subwoofer size: 12"
3. Subwoofer type/ impedance: Dual 4 ohm
4. Voice coil (diameter): 2" (50.80mm)
5. BL: 18.966
6. FS: 31.003 Hz
7. QTS: 0.461
8. QES: 0.496
9. QMS: 6.532
10. VAS: 69.221 liters
11. SPL: 88.10 dB (@1w/1m)
12. Xmax: ~15mm (Both way)
13. Displacement: 0.12 ft³

Box Specifications:

1. Sealed: 1.00 ft³
2. Ported: 1.50 ~ 2.0 ft³

Mounting / Installation Parameters:

1. Cutout diameter: 279mm / 11"
2. Overall diameter: 318mm / 12.5"
3. Mounting depth: 145mm / 5.70"