Heft, for me, is the quality of bass sound that hits you in the body, not something you get with your ears.
I paired my Trace Elliot head with two Barefaced Supercompact for the first time at a pub venue in a room upstairs. The place will take about 200 people (The Ship in Old Leigh, if anyone knows it). I wasn't going through the PA. A bass player I know who just happened to be standing at the back said as soon as I started to play he got that push in his guts and lamented selling his Trace Elliot head.