Dacs HeadLite2 Manuel de l'utilisateur - Page 5

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3 & 6 Outputs

Connections

The headphone outputs are on three pole ¼" jack, tip=left, ring=right, sleeve=0V. The

front and rear outputs for each headphone amplifier are connected in parallel. The

output circuitry is designed to drive down long lines with minimal high frequency loss.

If you are sending headphones signals down long lines using screened twin

conductor cable (such as foil screened twin, FST), we would recommend using two

separate cables if you can. This would reduce any possible cross-talk between the

left and right channels. There are installations we know of where left and right are

sent down the two conductors of FST, and all reports have been good.

If two or more pairs of headphones are to be driven by an output, they should be of

the same type and impedance. If they are different (eg. low and high impedance),

power sharing will not be even. One will be too quiet, and to achieve the required

level in that pair, the other pair will overload.

4 Earthing

The signal 0V is separate from the mains earth. This separation allows unbalanced

operation with a large measure of immunity to hum problems, since the amplifier is

not referenced to or connected to any earth other than the signal source. The mains

earth is connected to the case of the device. If you wish to connect the signal earth to

the mains earth or a technical earth, this may be done by running a wire from the

earth tag. This connection should only be made by qualified personnel, if it is

necessary. If in doubt please call us.

5 Sensitivity Switches

On the rear panel, there are sensitivity switches for channels A&B and C&D.

This allows user selection of sensitivity as an operational control, rather than

having to be set with internal links.

7 Volume Control

The HEADPHONE VOLUME control adjusts the signal level going to the amplifier.

This control allows independent volume control of each amplifier's output.

DACS LTD, Stonehills, Shields Road, PELAW, Gateshead, Tyne and Wear NE10 0HW

Tel: +44 (0) 191 4382500 | Fax: +44 (0) 191 4382511 | www.dacs-audio.com | [email protected]