Alpine R2-SB10V Halo Series 10" linkable ported subwoofer enclosure dblink If you have rear locations

If you have rear locations that don't make a component configuration feasible

Four 25mm hex-socket screws

Alpine optimizes their R2-S65C 6-1/2" 2-way component speaker system for near-perfect sound from premium sources

EV-40M-T owner's manual

Simple usb connection

Alpine R2-SB10V Halo Series 10" linkable ported subwoofer enclosure dblink If you have rear locationsTwice the bass Alpine's Halo Series subwoofer enclosures make it simple to add bass (and more bass) to your system. You'll get great bass response from a single box, and when you're ready to expand your system you can add a second enclosure and the optional linking kit to create a two speaker system with double the impact. Laying it down The R2 SB10V comes loaded with Alpine's updated R2 W10D4 subwoofer wired for 2 ohm impedance, for solid bass