Dacs HeadMaster Руководство пользователя - Страница 5
Просмотреть онлайн или скачать pdf Руководство пользователя для Контроллер Dacs HeadMaster. Dacs HeadMaster 8 страниц. D-a converter, monitor controller, reference headphone amplifier
Печатать страницуIn either case the level feeding the unbalanced input will be the same as the
balanced signal level.
4 Analogue Inputs
There are two sets of analogue inputs: balanced on XLR and unbalanced on Phono.
The maximum input level for the balanced inputs is around 28dBu, and for the
unbalanced inputs is +11dBV.
5 Headphone Output
The headphone outputs are on three pole ¼" jack, tip=left, ring=right, sleeve=0V. The
front and rear sockets 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 in
a single cable, 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.
Note on the problems of Loudness and Headphones
Our amplifier cannot do the impossible! We can only make headphones as loud as
they are capable of being. Beyond that they distort and clip, which is very bad for your
ears, short and long term. The problem usually is not so much that the headphones
are not loud enough; it is more that the sounds outside are too loud and are breaking
through into your ears. Approached from this direction the problem can be solved
more easily.
6 Volume Control for Headphone Outputs
This knob controls the volume of the headphone outputs; since both front and back
connections are in parallel it controls both outputs.
7 Power Switch
This switch illuminates when mains power ispresent. NB the switch is before the fuse
so if the mains switch is illuminated and none of the LEDs light up, then it may be that
the fuse is blown.
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]