No such thing as a "linear" supply, except for maybe a battery. 
So scroll down to where it says power supply, it says linear, so I'm confused,, as usual. Is this the input, like 120v?
http://www.crestaudio.com/assets/literature/specs/116972_11560.pdf
Bob Lee is of course sorrect. The linear in power supply refers to the voltage regulator used, not to the power supply.
"
A
linear regulator provides the desired output
voltage by dissipating excess power in
ohmic losses (e.g., in a resistor or in the collector–emitter region of a pass transistor in its active mode). A linear regulator regulates either output voltage or current by dissipating the excess electric power in the form of
heat, and hence its maximum power efficiency is voltage-out/voltage-in since the volt difference is wasted. In contrast, a switched-mode power supply regulates either output voltage or current by switching ideal storage elements, like
inductors and
capacitors, into and out of different electrical configurations.
Ideal switching elements (e.g., transistors operated outside of their active mode) have no resistance when "closed" and carry no current when "open", and so the converters can theoretically operate with 100% efficiency (i.e., all input power is delivered to the load; no power is wasted as dissipated heat)."
