I am heading to Essex to collect the stored Sonic Bed_London v.o. subs. Sonic Bed_Scotland’s install on Monday answered the mysterious sensation that that Bed’s bass end had never really performed before. Subs and amps top tech spec… curious. Answer; turn over the boxes and it was revealed that the Scottish maker had lifted the floor of the cabinet by 11cm so reducing box’s internal air space thus cancelling any possibility of sub. AH.!@*****^*!!. Today is the 1st moment I have to do anything about it, but hey, great to have chance be able to do a real test of the physics.