Sound level setting?

[Tim Curtis]

Thanks for your reply @Nutul

Herewith a link to the usb dac/headphone amp. http://www.hirestech.com/product/?pid=107

Basically it's this (from product description):
Dual purpose built, it incorporates both a high–performance headphone amplifier with an analog volume control that allows you to connect the microStreamer between your computer and headphones; and a fixed-level, low impedance 2.25V line output that allows you to connect between your computer and home stereo, other entertainment system or to powered loudspeakers.

I have RPi MoOde connected via USB and use the fixed-level output to connect to the AudioEngine 2+ powered loudspeakers.

I don't fully understand your comment, how do I set the speakers to 0dB output? To my knowledge the AudioEngine 2+ does not have such a setting?

As @Nutul mentioned it's a bit confusing how this device can do both a line level and variable level output where the line level output is fixed at 100% volume and the variable level output is controlled by the host.

Does "Hardware" appear in the list of choices for volume type in Audio Config?