The CompC 12-Inch Subwoofer Enclosure comes loaded with a single 4-Ohm terminal.

Features:

Uses Very Little Trunk Space
Genuine CompC Subwoofer
Custom Port Design
Made Of Heavy MDF
Spring Loaded Speaker Terminal
Thick Black Carpet Protects the Enclosure
Embroidered KICKER Logo
This enclosure works best with 300 watts of recommended power. See below for more details.

Specifications
Subwoofer (in, cm): 12, 30
Impedance (Ohms): 4
Power Watts (peak/RMS): 600/300
Sensitivity (dB 1w/1m): 95.3
Box Top Depth (in, cm): 11-7/16, 29
Box Bottom Depth (in, cm): 14-5/8, 37.2
Box Height (in, cm): 16, 40.6
Box Width (in, cm): 17-1/2, 44.5