Is the Benchmark DAC-1 HDR a passive preamp?

Can't seem to figure out if the preamp section of the Benchmark DAC-1 HDR is a passive linestage or an active preamp. Thanks guys.
I am fairly sure that it is active. It has a very low output impedance.
Since the analog output section uses op amps, doesn't that make it active?
Active, I know this for sure.