Benchmark DAC1 HDR Bedienerhandbuch PDF herunterladen (Seite 22)

DAC2 Series Instruction Manual Rev C Page 22

Internal Settings

Removing Top Cover

The DAC2 cover must be removed to gain

access to the jumpers. Do not attempt to

remove the faceplate or rear panel.

CAUTION: The DAC2 contains static

sensitive components and should only be

opened by qualified technicians. Static

discharge may cause component failures,

may affect the long-term reliability, or

may degrade the audio performance. Use

a static control wrist strap when

changing jumper settings.

CAUTION:

•

Disconnect AC power by unplugging

the power cord at the back of the

DAC2.

•

Remove only the 8 screws holding

the cover (4 on each side).

•

Do not remove any screws on front or

rear panels.

•

Never remove the power entry safety

cover in the rear corner of the DAC2.

•

Always connect a static-control wrist

strap to the chassis before touching

any internal component.

Low-Impedance Passive Pads

The XLR outputs are equipped with low-

impedance passive pads that may be used to

reduce the output levels while preserving the

full dynamic range of the DAC2. The DAC2

ships with the 10 dB pads enabled.

TIP: When directly driving power

amplifiers and powered speakers, start

with the factory default 10 dB pad

setting. If necessary, change the pads

so that normal listening levels are

achieved with the ‘Volume Control’ above

the 11 o’clock position.

When the output pads are enabled, the

output impedance changes slightly, and the

maximum allowable cable length should be

reduced as shown in Table 1 (assuming 32

pF/foot and a maximum allowable loss of 0.1

dB at 20 kHz).

Table 1 - Cable Drive Capability

Balanced Output Drive Capability:

A

ttenuator Output Maximum Loss in dB

Setting (dB) Impedance Cable (ft) at 20 kHz

0 60 680 0.1

10 425 96 0.1

20 135 302 0.1

Unbalanced Output Drive Capability:

Output Maximum Loss in dB

Impedance Cable (ft) at 20 kHz

30 1360 0.1

TIP: To set the XLR outputs to typical

professional studio levels, set the pads

to 0 dB. For most home installations, set

the pads to 10 dB or 20 dB.

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