Amazon.com: KEF KUBE 8b Subwoofer Black : Electronics
FS: KEF KUBE 8B 8" Subwoofer for Bookself Speaker | Stereo, Home Cinema, Headphones Components
KF92 Subwoofer | KEF Europe
Settled on a nice little 2.1 setup. KEF LS50 black edition, KEF Kube 8b. Nice and blended. May raise the LS50s to ear height with some stands but otherwise happy for now.