Dan D'Agostino Momentum Manuel du propriétaire - Page 5

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maKing connections to

the momentUm PReamPLifieR

Interconnect cables

We recommend the use of high-quality balanced XLr audio interconnect cables with the

Momentum preamp. If you have a source device that does not offer XLr connections, use

the high-quality XLr-to-rCA adapters provided with the Momentum preamp. If you need

more adapters, please contact your d'Agostino Master Audio Systems dealer. do not use

XLr-to-rCA adapters to connect the preamp to your amplifier—use only an amplifier with

XLr balanced inputs.

First connect the source devices (phono preamp, Cd player, etc.) to the appropriate inputs.

Connect each XLr cable (or XLr-to-rCA adapter) to the appropriate XLr jack by pushing

the plug into the jack. To release the plug, push on the small tab atop the jack and gently

detach the plug. never grasp interconnect cables by the cable itself—you could damage the

cable. Be sure to connect left channel to left channel, right channel to right channel.

note that the Momentum Preamplifier does not incorporate a phono stage; you will

have to add an external phono stage in order to use the Momentum with a turntable. We

recommend getting a phono stage of the best possible quality in order to get the best from

the Momentum.

now connect the Momentum's line outputs to your amplifier. Connect each XLr cable to the

input by pushing the cable onto the jack. To release the XLr cable, push on the small tab on

the top of the plug then grasp the cable by the plug and gently pull it out.

Power supply connector cable

The Momentum preamp is supplied with a special power connector cable that connects the

power supply to the preamp main chassis. The connectors are surrounded with a collar. To

connect them, pull back on the collar, push the connector onto the jack on the power supply

or the preamp, then release the collar. To disconnect them, slide the collar back to unlock

the connector, then pull the connector loose.

Be sure to hook up the power supply connector cable before you connect the power supply

to the AC outlet.

AC cord

The Momentum preamp power supply is supplied with a high-quality AC cord tipped with a

15-amp IeC connector at the preamp end and a three-conductor AC plug at the other end.

You may use a different power cord with the Momentum if you wish, as long as it is tipped

with a 15-amp IeC connector and a three-conductor AC plug.

After the speaker, interconnect cables, and power supply connector cable are connected,

push the IeC connector on the power cord into the IeC jack on the Momentum preamp.

12-volt trigger outputs

These 3.5mm jacks emit a 12-volt dC control signal when the preamp is on. You can connect

them to any devices that take a 12-volt dC control input, such as an amplifier.

Remote control input

This is a standard IC5-type 3.5mm input for a remote control signal. This can be used with

home automation systems, or with an Ir repeater system in situations where the Momentum

preamp is installed in a cabinet.

RS-232 input

This dB9-type input allows the Momentum preamp to be controlled by home automation

systems that use the rS-232 protocol. Consult your d'Agostino Master Audio Systems dealer

for more information.

oPeRation

Initial power-up of the preamplifier

To power-up the Momentum preamplifier, you need to use two switches. one is located on

the back of the power supply; this switch turns the AC power on so the power supply will be

active. The other is the Standby button located on the front of the preamp.

First, flip the switch on the back of the power supply to the on position. Then press the

Standby button on the front of the preamp. This will power up the preamp and illuminate the

volume indicator.

After power is switched on, the Momentum requires approximately 30 minutes to reach

optimal operating temperature. Although the preamp will sound excellent upon initial

listening, the sound quality will improve as it warms up, much as the flavor of a fine red wine

improves if it is allowed to breathe for a few minutes.

Basic operation

The Momentum preamp offers only a few basic functions: power on/off, volume, source

selection, phase and mute. operation is simple but a brief description follows.

standby: The Standby button is located under the front edge of the preamp. When the

preamp is in standby (off) mode, the Led in the middle of the button will be lit. Push the

button to turn the unit on. When power is on, the Led in the middle of the button will go

off and the volume indicator will illuminate. Push the button once more to turn the unit

off. The light for the volume indicator will go out and the Led in the middle of the Standby

button will light up.

Volume: Turn the ring around the volume indicator clockwise to raise the volume and