/32bit digital-TO-ANALOG CONVERTER
REVISION 1PrA – MAY 2012
Copyright © 2012, M2Tech Srl
same frequency as the sample rate of the file or disc being played back. The Vaughan
uses the word clock to synthesize its master clock by a dedicated internal circuit. The
VAUGHAN automatically recognizes the clock frequency and type
Due to the unit’s internal structure, external word clocks may not allow for the best
performance, while master clocks do. Thus, using a master clock frequency, when
available, it’s preferred.
14. Stereo and dual mono modes
All S/PDIF and AES/EBU inputs (Toslink
included) can be used as either two
separate stereo inputs for sample rates up to 192kHz (96kHz on Toslink
) or a a single
dual mono input on two wires for sample rates up to 384kHz (192kHz on Toslink
mono mode also accommodates some sources which only carry high resolution (192kHz)
on two wires. Each input pair can be independently configured to operate in either stereo
or dual mono. See details about how to configure the input mode in Section 16.3, Page 30.
15. Power supply, battery and battery charger
The VAUGHAN has a sophisticated power supply based on an universal AC power AC/DC
converter, a high quality, high capacity and high surge current LiPo battery and a
dedicated battery charger.
The units normally draws its power from the battery and the AC/DC converter is switched
off to avoid injecting noise in the audio circuits. A battery charge is sufficient for 4/5 hours
listening, depending on various factors like the ageing of the battery, the use of
headphones and the selected input.
When the battery is depleted, the system automatically isolates it from the audio circuits
and power them by the AC/DC converter (unless “manual” is selected for the power mode,
see Section 16.3, page 30), to ensure uninterrupted operation. The converter is also used
to provide the current to charge the battery via the dedicated battery charger.
When “manual” is selected for the power mode, the above strategy is inhibited and the
battery is used to the full capacity. After it is completely depleted, the system switches
itself off, thus isolating the battery to avoid damages due to excessive discharge. Before
reaching this point, the system advices the user with messages on the display. User may
decide to put the unit in standby, thus manually initiating a charge cycle.
In case of battery or battery charger failures, the user can force the usage of the AC/DC
converter to avoid stopping the unit while waiting for servicing or replacement, at the cost
of a slightly lower sound quality.