In the workshop this morning I got fed up listening to France Info's repetitive pre-election waffle and put Aaron Copland on the mifi**. The left channel had dropped out for some reason but I was using whirry electrics so I decided the one channel would do and bumped up the volume to compensate. About two minutes into Appalachian Spring, the loud bit with triumphant brass and mucho percussion, the missing channel cut in. The shop has concrete walls, roof & floor so the effect was rib-rattling, very like being inside one of the speakers.
But it was bloody wonderful so I left it that way until I needed to think.
** in this case half-buggered 1981 Sony music centre with still-good amp & hefty separate CD deck, playing through speakers with 8" woofers.