Electrotap Hemisphere Speaker

I might eventually get the Hemisphere by Electrotap instead of a conventional speaker cabinet for my cello and bass. The frequency response goes down to 60Hz, which might be a restrictive for those low notes on the low B string of my bass, but a subwoofer could be added if necessary. The main appeal of this alternative speaker system is that it more closely approximates the sonic behavior of acoustic instruments, in that it radiates sounds in all directions instead of just one.