The unit has four inputs: AES/EBU, SP/DIF, balanced analogue and unbalanced analogue. The analogue inputs use THAT InGenius® balanced input ICs providing 90dB CMRR, DC coupling and THD+N figures of around 0.0015% input to output. Inputs are selected using the stainless steel front panel switches with LED indicators.
HeadMaster’s outputs include two headphone outputs (one on the front panel, and one on the rear) and two selectable monitor outputs. The headphone and monitor outputs have independent volume control and are fitted with conductive plastic pots.
The rear panel features a fixed level balanced analogue output from the D-A input, with digital FSD set to provide and output of +18dBu. The headphone output uses DACS’ renowned Clarity headphone driver circuit. The balanced outputs are DACS’ high performance driver circuits.
The Crookwood D-A uses a technique that makes it impervious to jitter on the incoming signal, and provides unobtrusive anti-aliasing filtering. The result is a clean accurate audio output, unaffected by jitter, or other digital anomalies. It simply does not get any better than this.
|For 1kHz sine in||Direct Out||Monitor Out
||HP Out (into 150R)|
|AES @ -18dBFS||@0dBu out||@-16dBu out||@+3dBu out|
|THD + N||0.001330%||0.002700%||0.003500%|
|Balanced IP @ 0dBu||@-9dBu out||@+10dBu out|
|THD + N||/||0.001300%||0.003400%|
|Unbalanced IP @ -10dBV||@-16dBu out||@+3dBu out|
|THD + N||/||0.003700%
Maximum Input Balanced >+28dBu Maximum Input Unbalanced 11dBV