The CompC Thin Profile 10-Inch Subwoofer Enclosure comes loaded a single 4-Ohm terminal.

Features:

Fits Perfectly Under Or Behind A Seat
Genuine CompC Subwoofer
Custom Port Design
Made Of Heavy MDF
Spring Loaded Speaker Terminal
Thick Black Carpet Protects the Enclosure
Embroidered KICKER Logo

Specifications
Subwoofer (in, cm): 10, 25
Impedance (Ohms): 4
Power Watts (peak/RMS): 600/300
Sensitivity (dB 1w/1m): 93.8
Box Top Depth (in, cm): 4,10.2
Box Bottom Depth (in, cm): 7-5/8, 19.4
Box Height (in, cm): 15, 38.1
Box Width (in, cm): 21-1/2, 54.6