5
Interconnect Cables
Start by connecting the source devices (computer, phono preamp, CD player, etc.) to the DDP-1. In every case, grasp the
cables by the plugs/connectors, not by the cable itself, otherwise you could damage the cable or the DDP-1's jack panel.
The most critical connection is the one between the DDP-1 and the power amplifier. If your amplifier offers XLR input, we
strongly recommend you use XLR cables to connect the DDP-1 to the amplifier. This will minimize noise and interference
while providing a more secure connection.
For AES/EBU and XLR input connections, align the pins inside the plug and push it in until it clicks. To remove, press the
tab on the top of the jack, above where the plug connects, then pull the plug out. For XLR output connections, follow the
same procedure for connections, and press the tab on top of the plug, then pull the plug out. For RCA (coax), optical, USB,
and I
2
S connections, simply grasp the plug and insert it into the jack on the DDP-1.
12-volt DC Trigger Output
This is a 3.5mm (1/8-inch) jack that produces a 12-volt DC control signal when the preamp is on. You can connect it to any
amplifier (or other device) that accepts 12-volt DC trigger input. This way, the amp or other connected component will auto-
matically turn on when the DDP-1 is on, and off when the DDP-1 is off.
Powering Up the DDP-1
Once the power supply is connected, press the Power button on the front of the DDP-1 or on the
remote. We recommend you switch on the DDP-1 on before you switch on your power amplifier.
Touching the power button will activate a 20-second warm-up. During this time, the DDP-1's circuits
will come up to operating temperature, and its motorized volume control will automatically calibrate
itself by turning back to 0, then returning to the last volume setting you used. No audio signals will
pass through the unit while it's warming up. When the front display shows the two-digit volume read-
out, the DDP-1 is ready to use.
Adjusting Volume
To adjust volume, press the +/- Volume buttons on the remote or turn the Volume knob on the front
panel. The setting will be displayed on the LCD. Minimum volume setting is 00, max is 99.
Selecting an Input
There are two ways to select an input on the DDP-1: either directly with the buttons on the remote,
or by using the Menu/Input Select knob on the front panel.
To select an input with the remote, press the button for that input. To toggle between the RCA in-
puts, press the RCA input. The front LCD will show which is selected. To select an input from the
front panel, turn the Menu/Input Select knob in either direction. The input list will be displayed on the
LCD. Turn the knob until the input you want appears in bold. (If you don't see the input you want,
turn the Menu/Input Select knob until it appears.) Press the Enter button to select the input.
Mute
To mute the audio, press the Mute button on the remote or the front panel. The sound will go quiet,
the red Mute indicator will appear in the lower right corner of the display, and the volume readout
will turn red and flash. Press either Mute button again to restore the sound.
Using Headphones
To use the DDP-1 as a headphone amp, plug a set of headphones into the 1/8-inch jack on the front
panel. An adapter can be used for headphones that have a 1/4-inch (6.2mm) plug. Press the
HP/Pre button on the remote or the front panel. The preamp outputs will mute and the front display
will show that the DDP-1 is in headphone mode. Press either HP/Pre button again to mute the head-
phone output and reactivate the preamp outputs.
Operation
