Galliardist
Major Contributor
You tested a power amp against an integrated amp. You also tested a less powerful amp (assuming the AHB2 was used in stereo mode) against a more powerful amp.I have auditioned the benchmark ahb2 recently against the marantz pm10 and even though the benchmark measures better the marantz sounds better. My benchmark ahb2 is up for sale. There is more detail revealed by the marantz with a bigger sound stage and better separation between instruments. What surprised me the most about the benchmark is how ‘stunted’ or ‘cut off’ the very low frequencies are expressed that the marantz does much better on. Stronger tight punch on low frequencies by marantz. Another person auditioned with me and we drew both the same conclusions.
We both concluded that measurements are of lesser importance and sound listening is much more important.
We don’t know enough about what needs to be measured to draw valuable enough conclusions from that alone. Lesson learnt
So you compared apples to oranges, quite apart from, no doubt, not level matching and checking impedence, gain and voltage levels for connections. You don't mention source or speakers used. If gain on whatever you used with the Benchmark was too low, and the speakers used required lots of power to drive the bass (where more power is needed) adequately, you would get precisely this result. We don't even need to ask for a blind level matched test if one of your options is a mismatch. Any system has to be properly matched and with components used within their performance envelope.
For goodness' sake, test properly and give full details of the test.