Rick,
I continue to love this speaker and have found it to be the best small speaker I've ever owned for double bass--at least for my double bass which is a LaScala Hybrid with Evah Pirazzi strings, and a Rev2 Solo pickup played through either an AI Focus S. III or an older AI Clarus XL. It is compact and fits easily in a Deluxe Cajon bag with an amp, and weighs only 16 pounds. It has a fat, quite traditional sound and I often take a little off the bottom with the HighPass filter of the Focus or my HPFPre when using the Clarus XL although there is plenty enough top end in the single speaker to put some air in the double bass. It sounds particularly good when you want just a little amplification to fill in the bottom notes, like when playing with an unamplified acoustic pianist. However, it can put out plenty of volume and I've used it as my only piece of equipment playing with a reasonably loud, 17-piece big band. I've also been rehearsing with a three-horn, 4 rhythm band being put together by the vocalist/guitarist leader that plays a mixture of swingy stuff (think Michael Buble) as well as older rock & roll like Gerry Rafferty for which I play bass guitar.
Previous small speakers I have used include a couple of Wizzy10's, the really early Euphonic Audio speakers whose numbers I can't remember, a Schroeder 110, a GK MB150X, a fibreglass Crazy 8, an Acme B-1 (the BF One10 puts out way more volume than the Acme) and my AI Ten2EX speaker that I still own and use occasionally for duo or trio gigs with no drummer although the much lighter weight of the BF One10 keeps drawing me back to it.
Hope this is helpful.
Erik Hansen aka Lownote
Edinburgh, Scotland