Conrad-Johnson DR-1 Manuale d'uso - Pagina 4

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nstallation

Because the DR-1 dissipates very little heat, ventilation is not an impor-

tant consideration, allowing greater flexibility for custom or built-in instal-

lations. Of course, reasonable judgement must be exercised to see that

the DR-1 does not obstruct ventilation required by amplifiers or other

equipment in the system. The unit must be mounted horizontally.

All DR-1s sold in the United States are configured for operation on a

60Hz ac power line producing between 108 and 126 volts. Export

versions of the DR-1 will have the correct operating voltage and fre-

quency clearly marked on the back panel of the unit, near the ac power

cord. In all cases, the actual line voltage should be within + 5/- 10% of

the nominal rated voltage.

Electromagnetic Interference (EMI)

Considerable care has been taken in the design of the DR-1 to minimize

it's susceptibility to radio frequency interference and other forms of EMI.

Choice of materials, physical layout, grounding practice, and power

supply design have all been specified with a view to reducing the impact

of electromagnetic fields on the performance of this unit, and to assure

that it does not radiate fields that might interfere with the operation of

other units.

Care in installation can often avoid EMI induced problems. The following

practices should generally be observed in any application, and will be

especially important where EMI may be a problem.

Audio interconnect cables should be kept as short as possible (3 meters

or less), and shielded cable should be used (cable which has two center

conductors, and a separate external shield connected at only one end).

Physical location and cable "dress" can be an important factor in mini-

mizing hum pickup. The installation should situate the DR-1 away from

the preamplifier and other sources. Power (ac mains) cords should be

dressed to remain at least 4" (100mm) away from audio signal cables,

and from coaxial digital cables.

DR-1 Owner's Manual