9
Front Panel Operation
Power Button
Pushing the Power button will turn on the Zdac v.2. The power button illumination will change from red
to green. The most recently selected digital input will also illuminate green. Pushing the Power button
again turns off the Zdac v.2 and the button illumination will change to red to indicate the unit is in
standby.
Input Button
Press the Input button to cycle between OPT, COAX and USB inputs.
Input Indicators
The selected input will illuminate green. Available inputs are OPT, COAX and USB.
Main Volume Knob
The Main Volume knob controls a high quality analog potentiometer. It adjusts the output level of the
RCA and Balanced (XLR) outputs when the rear panel Volume Control Lockout switch is set to Variable.
If your Zdac v.2 is connected directly to your power amp you will use the Main Volume knob to control
the playback level of your stereo system. If the Volume Control Lockout switch is set to Fixed this knob
will be disabled and the volume will be set to maximum.
Listening with Headphones
The Zdac v.2 is equipped with a dedicated high quality current-feedback headphone amplifier based on
the top grade Texas Instruments TPA6120. This superior design allows for an extremely high slew rate
preventing odd order distortions which are responsible for listening fatigue. The virtually instantaneous
response to musical dynamics doesn’t raise the noise floor or degrade the s/n ratio like typical
headphone amps. The headphone amp circuit was also designed with a low 10 ohms output
impedance and high gain to drive headphones rated up to 600 ohms. We are confident you will be
thrilled with what you hear when the Zdac v.2 is mated with any of your preferred cans.
Headphone
Jacks
The Zdac v.2 accepts both 1/8” (3.5
mm) and 1/4” (6.3mm) stereo plugs. Both headphone jacks can be
used at the same time. A very low 10 ohms output impedance and high gain allows the Zdac v.2 to
drive headphones with impedances up to 600 ohms.
Note:
The Zdac v.2’s Analog XLR and RCA output jacks will be automatically muted whenever you
insert a headphone plug into either of the Zdac v.2’s headphone jacks.
Headphone Volume Knob
The headphone volume knob controls a high quality analog potentiometer. It adjusts only the output
level of the headphone jacks and it has no effect on the Analog XLR or RCA jacks’ output level.
Note:
Headphones can create dangerously high sound pressures levels without the audible
distortion you would hear from loudspeakers at comparable volume levels.
To protect your
hearing
please do not listen at high volumes for an extended time.
