Using the DACS Headmaster
Installation
1 Connecting the Power
The unit will accept 240 VAC and 110 VAC mains supplies. The IEC inlet’s fuse holder
is used as a selector as shown in Fig 2. The factory setting is for 240 VAC.
Figure 2
2 Digital Inputs
Connections
The AES/EBU input is on XLR. The S/P DIF input is on phono. The inputs both accept
sample rates from 32kHz to 200kHz.
3 Fixed Level Out and Variable Outs, Balanced
This fixed level signal is a direct out from the D-A converters. It is factory set to
provide a signal level of +18dBu for a digital signal at 0dBFS. For unbalanced
operation you must connect the output Pin 3 to Pin 1 OR connect the unbalanced
screen to Pin 3 (optionally leaving the Screen terminal of the TRS jack unconnected).
If an analogue input is selected but there is an AES/EBU signal coming in to the unit,
then this signal will appear on the fixed level output regardless of the analogue input
selected. If there is an S/P DIF signal coming in it will not be sent to the fixed level
output. However, if you wish the S/P DIF input to go to the fixed level output while an
analogue input is active, then this can be achieved by pressing the S/P DIF and the
analogue input simultaneously.
The variable outputs are intended to feed loudspeakers, and use two pairs of TRS
jack sockets. If the destination is unbalanced, then the output must be connected
either by using a two pole jack in the HeadMaster (or linking the Ring and Sleeve of a
TRS jack) or by connecting the signal to the Tip of the TRS jack and the unbalanced
screen to the Ring of the TRS jack (and optionally leaving the Screen terminal of the
TRS jack unconnected).
240V
11
0V
Set for 240VAC
24
0V
110V
Set for 110VAC
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]
