Slam” is a very interesting attribute. What does it mean? Do you hear this “slam” when listening to live music? Is this “slam” an accurate representation of what’s on a recording or is it emphasis of particular frequency range that one component features over another? In most cases, “slam” is not real. Accurate reproduction/presentation is what I value in my system. This includes dynamics, tone, focus, layering, separation, soundstage. Coda is balanced pretty well in that regard. Imo
“Slam” is perhaps not the best descriptor for what I was trying to convey. To be more concise, my Yamaha seems to provide better woofer control and authority than the Coda 8 in the lowest two octaves, even with speakers that have a -3dB point of ≈35Hz. It wasn't notable until I swapped the Yamaha back into the system. Otherwise the No.8 did sound quite balanced, but then so does the Yamaha. So it doesn’t seem to be a linearity effect, but more to do with outright extension and damping factor. The Coda has more power on paper but the Yamaha 2100 sounds more powerful in practice—more “effortless.” That’s the best way I can describe the difference.
My Parasound A21 sounds more powerful on the whole than either aforementioned amp, but it still doesn’t seem to plumb the lowest octave quite as deeply as the Yamaha. But among the dozens of amps I’ve owned, the Yamaha digs the deepest for some reason. That’s not to say the Coda is a slouch in that regard, it is certainly better than the majority of Class D amps, without question.