I've tested the remote volume with an SPL meter and here's what I've found. Pressing volume up or volume down once yields a change of about 2.5 dB.

I tested using 80 and 125Hz warble tones calibrated to 70 dB with my meter. A press on the volume up or down ALWAYS yielded the same approximate 2.5dB differential for me.

As Dave and others have mentioned, this is a minimally perceptible change.

Obviously, pressing the button for a longer period results in greater movement of the volume control and greater changes in volume, but this is dependent on how long you hold the button down.

I've had my 2150 for about three weeks in a bedroom system and I am extremely happy with its performance. I replaced an Audio Analogue Primo integrated amp which had a motorized volume control and the AA remote volume moved in much wider increments than the Outlaw. I have a much easier time getting the volume I want with the 2150's remote.

Regards,
Tony.