4 Inch Round woofer HiFi Stereo Jamma Speaker 30W RMS 8 ohm, by RetroArcade.us - Walmart.com
Subwoofin' Arcade1up - I have been integrating a small $67 powered 8” subwoofer in all my cabs to help with bass deficiencies. Works well with Arcade1up in that this (monoprice powered 60-Watt