Sat 7/19/2014 8:52 am. The microcube already has plenty of good reviews, but I'd like to point out something that may not be so obvious (it wasn't to me); it makes a good preamp for an existing effects-challenged large amplifier. In my case this was a really old "Kent" with the electronics ripped-out sometime in the Carter administration/replaced 12" speakers + a 20-watt (so they say) "Lepai" stereo amp + the wondrous microcube, with the Lepai plugged into the cube's "record out/phones" jack (through a hacked-up cable) -- when something's plugged in there, the microcube's speaker is silent. The result gives me my ridiculous Kent miraculously resurrected with all the microcube effects/amp sims! The microcube's portable-enough so you could actually use something like that to play somewhere, if you had some beloved old wreck you wanted to upgrade with reverb etc....